Fresno County, CA Building Permits, Zoning & Septic Rules

Unincorporated Fresno County, California requires a building permit for most construction, remodeling, and manufactured-home placement through the county's Development Services division¹. Fresno County also zones unincorporated land under its Zoning Ordinance² and issues septic permits through Environmental Health³. An owner-builder may perform qualifying work but must still obtain required permits, complete Fresno County's owner-builder form, and pass code inspections⁴⁵.

At a glance

Building permit: Required in unincorporated Fresno County, with exemptions for small structures¹
Zoning: Yes, under the county's own Zoning Ordinance²
Septic: County-issued through Environmental Health under Title 15 and the county LAMP³
Owner-builder exemption: Allowed with a signed Form F174 owner-builder affidavit⁴
Soils suitable for conventional septic: Just 5.8% of the county's soils have no severe limits⁶
Minimum lot size: Varies by zone, from 6,000 sq ft to 640 acres⁷
Well permits: Construction permit required; no permit needed to operate a well⁸

Who to call

Building permits

Fresno County Development Services — Building & Safety

Building permits, plan check and inspections for unincorporated Fresno County

(559) 600-4570

[email protected]

2220 Tulare Street, Fresno, CA 93721

Zoning

Fresno County Development Services — Zoning

Countywide zoning administration for unincorporated Fresno County

(559) 600-4540

[email protected]

2220 Tulare Street, Fresno, CA 93721

Septic permits

Fresno County Department of Public Health — Environmental Health

Septic (OWTS) system permitting and inspection, and private well construction permits, in unincorporated Fresno County

(559) 600-3357

1221 Fulton Street, 3rd Floor, Fresno, CA 93775

Floodplain permits

Fresno County Public Works and Planning — Development Engineering Section

Floodplain development and grading permits for Special Flood Hazard Areas in unincorporated Fresno County

(559) 600-4022

[email protected]

2220 Tulare Street, Suite B, Fresno, CA 93721

Contact details are copied from each office’s official page and were checked against it on September 29, 2026.

Do you need a building permit in unincorporated Fresno County?

Yes. Unincorporated Fresno County requires a building permit for the erection, construction, enlargement, alteration, repair, moving, improvement, demolition or conversion of a building or structure, unless a specific exemption applies¹⁹. Some of the plainer exemptions: a detached accessory structure like a tool shed up to 120 square feet, a fence up to 7 feet high, a retaining wall up to 4 feet unless it holds back a surcharge or Class I, II or III liquids, and an on-grade water tank up to 5,000 gallons with a height-to-width ratio no greater than 2:1⁹. A small detached farm or accessory building can also skip a permit if it's Group U, one story, no more than 240 square feet of floor area, no more than 380 square feet of roof area, and no taller than 10 feet at the wall or post - though claiming that exemption still means filing through the county's Citizens Portal with a site plan, at a cost of $153.44 plus a $21.85 online fee¹⁰. The applicable code just changed, too: the 2025 California Building Standards Code took effect January 1, 2026, and any permit application filed after December 31, 2025 has to meet the new code rather than the 2022 edition¹¹¹².

Who is the Fresno County building department and how do you reach them?

Fresno County's Development Services and Planning offices are at Fresno County Plaza, 2220 Tulare Street in Fresno¹³. For permit and plan-check questions call (559) 600-4570; the separate Building Inspection line is (559) 600-4560, with a 24-hour inspection request line at (559) 600-4131¹³. For a qualifying residential project, the county must determine whether the application is complete within 15 days, then complete project review within 30 days for 25 units or fewer or 60 days for 26 units or more¹⁴. County building-permit fees increased by 3% on July 1, 2026 under Ordinance 24-005; use the current Master Schedule of Fees when budgeting¹⁵.

Does Fresno County have zoning?

Yes. Fresno County's Zoning Ordinance classifies and regulates land use in the unincorporated area under the county's General Plan and applicable specific plans²¹⁶. That's a county rule, not a citywide one: the City of Fresno runs its own separate zoning ordinance and development code inside city limits, so confirm which jurisdiction actually covers your parcel before you rely on anything here¹⁷. Minimum lot size swings enormously by zone: the AE and AL agricultural zones require 20, 40, 80, 160, 320 or 640 acres depending on the designation, R-1-A and R-1-AH require 20,000 square feet, R-1-B requires 12,500 square feet (18,500 within the Fig Garden Neighborhood Plan's Low Density designation), R-1 requires 6,000 square feet, R-2 and R-2-A require 6,600 square feet, and R-3 and R-3-A require 7,500 square feet⁷. Setbacks vary by the same zones: R-1-A and R-1-AH require a 35-foot front, 10-foot side, and 20-foot rear setback; R-1, R-2 and R-2-A require a 20-foot front, 5-foot side, and 20-foot rear setback; and the AE and AL zones require a 35-foot front, 20-foot side, and 20-foot rear setback¹⁸. If you're considering an accessory dwelling unit, California's ADU law requires the county to approve it ministerially, without discretionary review or a hearing, and to tell you in writing within 15 business days whether your application is complete¹⁹; in Fresno County specifically, an ADU on septic needs its own separate septic system, an ADU on sewer can sometimes tie into the existing house connection if the piping is large enough, and ADUs currently aren't allowed at all in the county's designated low-water areas²⁰.

How do septic and well permits work in Fresno County?

Fresno County Environmental Health, not a separate district, issues septic permits here under county Ordinance Title 15 and the county's Local Area Management Program³. Statewide, California's septic rules work the same way almost everywhere: the State Water Board sets policy, and Fresno County's own Local Agency Management Program implements it locally, consistent with the statewide OWTS Policy²¹. The same Environmental Health office issues well construction permits for private domestic, agricultural, and public wells in unincorporated Fresno County, though once a well is built, no separate permit is required just to operate it⁸. Reach Environmental Health at 1221 Fulton Street, 3rd Floor, Fresno, CA 93775, phone (559) 600-3357²². Soils are the real caution in Fresno County: only 5.8% of the county's soils have no severe limits for a conventional septic drain field, one of the lower shares on this Index, so plan on a site evaluation and a real chance of an engineered or alternative system almost anywhere you're looking⁶. If you're adding an ADU to a property that already has septic, budget for a second, separate septic system rather than assuming the existing one can serve both units²⁰.

Can you live in an RV or tiny home in Fresno County?

California treats a tiny home or an RV as a housing type that must fit an established legal category. A tiny home may be occupied only if it meets the standards for an approved HUD-Code manufactured home, California Residential or Building Code home, factory-built home, recreational vehicle, park trailer, or camping cabin; a structure outside those categories that does not meet the state building code cannot legally be occupied²³. State guidance says an ordinary RV is not intended as a permanent dwelling and generally may be occupied only in a mobilehome park or special occupancy park unless a local ordinance allows otherwise²⁴. A manufactured home may be occupied inside or outside a mobilehome park when it meets the applicable federal standards, California Manufactured Housing Act, and Title 25 requirements²⁵. We could not confirm a general Fresno County rule for living in an ordinary RV on private unincorporated land outside a park or for temporary camping on private land; ask Fresno County zoning about the parcel and proposed use before relying on either option²⁶.

Building a home in Fresno County: the steps, in order

Confirm the parcel's zoning district, minimum lot size, and setbacks with Fresno County zoning before designing the home²⁶⁷.
Check floodplain status; construction in a Special Flood Hazard Area requires a building and/or grading permit and licensed contractors, engineers, or architects²⁷²⁸.
If the lot lacks public sewer, obtain septic approval from Environmental Health and allow for the possibility of an engineered system because only 5.8% of county soils have no severe limits for a conventional drain field²²⁶.
If the project needs a well, use a licensed well driller to obtain the well construction permit from Environmental Health²²⁸.
Choose an owner-builder or licensed-contractor route; an owner-builder must complete the county form and remains responsible for permits, code compliance, and inspections⁴⁵.
Submit the building permit application; qualifying residential projects have a 15-day completeness review and a 30- or 60-day project review depending on unit count¹⁴¹³.
Apply for the certificate of occupancy with the building permit application and do not occupy the building before the certificate is issued²⁹.
Budget using the current fee schedule, which reflects a 3% increase effective July 1, 2026¹⁵.

What to check before you buy land in Fresno County

Start with septic feasibility: only 5.8% of Fresno County soils have no severe limits for a conventional drain field, so a site evaluation can materially affect the build plan and budget⁶. Terrain also varies sharply: 38.6% of the county is at a 15% grade or less, 31.8% is wooded, and federal land covers 40.5% of the county³⁰³¹³². Heat and water deserve equal attention because severe drought occurs in about 40.3% of years and projections show roughly 34.1 days per year at or above 100°F by mid-century³³³⁴. A tentative tract map is generally used when creating 5 or more lots, with a Planning Commission hearing, notice to owners within 300 feet, and a 15-day appeal period³⁵. Farmland averages about $16,378 per acre, a typical home value is about $411,442, and the median property-tax bill is $2,704 per year at an effective rate near 0.7%³⁶³⁷³⁸³⁹. The nearest city of 100,000 or more is about 6 miles from the county's center⁴⁰.

Watch-outs

Fresno County's own zoning ordinance does not establish a general rule for long-term RV occupancy or temporary camping on ordinary unincorporated land outside a mobilehome or RV park; confirm your specific plan with Fresno County zoning before you count on it²⁶.
We could not confirm Fresno County's rules for short-term rentals or driveway access on unincorporated parcels; ask Fresno County zoning about both before buying or designing around either use²⁶.
The City of Fresno and other incorporated cities inside Fresno County run their own separate zoning and building rules; the county rules and offices in this guide apply only to unincorporated land¹⁷.

Sources

Written September 29, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

How Fresno County scores

Seclusion52100% ev.

Self-Sufficiency40100% ev.

Admin Boringness41100% ev.

Durability32100% ev.

Property Autonomy56100% ev.

Carry Cost41100% ev.

Evidence strength: 100%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$411kTypical home

0.7%Property tax

$16,378Land / acre

19.4"Annual rain

40.3% of yrsSevere drought

34.1 / yr (+17)Mid-century 100°F days

93.4 daysMid-century dry spell

1.87" (+5.7%)Mid-century 1-day rain

1.11×Wildfire change factor

100%Forward climate coverage

$1,156Home insurance / yr

3.4% / yrInsurance growth

0.87%Nonrenewal rate

county median (2+ published ZIPs)Insurance basis

3,708People within 30 min

3,608,466People within 2 hr

37,949Radius comparison (15 mi)

170.7People / sq mi

40.5%Federal land

38.6%Land at 15% slope or less

5.8%Septic soil without severe limits

207,694 acWorkable land screen

31.8%Wooded land

55 tonsBiomass / forest ac

56.1°FAvg temp

Answers from the rulebook for Fresno County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Fresno County rules

Building permitRequired
Erection, construction, enlargement, alteration, repair, moving, improvement, demolition, or conversion of buildings and structures in unincorporated Fresno County.
- Permits are required unless an applicable exemption applies.
- Exemptions include one-story detached accessory structures used as tool or storage sheds, playhouses, and similar uses not over 120 square feet; fences not over 7 feet; oil derricks; retaining walls not over 4 feet unless supporting a surcharge or impounding Class I, II, or III liquids; qualifying on-grade water tanks not over 5,000 gallons with a height-to-diameter or width ratio no greater than 2:1; qualifying sidewalks and driveways; painting, papering, tiling, carpeting, cabinets, countertops, and similar finish work; temporary motion picture, television, and theater stage sets and scenery; qualifying prefabricated swimming pools; nursery or agricultural shade cloth structures; playground equipment accessory to detached one- and two-family dwellings; qualifying window awnings; and qualifying nonfixed or movable fixtures, cases, racks, counters, and partitions.
- Fresno County Title 15 Section 15.08.020 adds exemptions for qualifying flagpoles, radio and television antennas, ground-mounted satellite receiving dishes, transportable gypsum and fertilizer storage tanks for agricultural use, and certain detached one-story Group U accessory structures not exceeding 240 square feet of floor/column area and 380 square feet of roof area with a maximum 10-foot wall or post height.
- All persons claiming the Item No. 18 exemption must comply with Fresno County Title 15 Section 15.08.030.
- Incorporated municipalities may administer their own permitting requirements.
detached accessory structure exemption floor area: <= 120 sq ft · fence exemption height: <= 7 ft · retaining wall exemption height: <= 4 ft (unless supporting a surcharge or impounding Class I, II, or III liquids) · water tank exemption capacity: <= 5000 gallons (must be supported directly on grade and height-to-diameter or width ratio must be no greater than 2:1) · Group U accessory structure exemption floor/column area: <= 240 sq ft (roof area also limited to 380 square feet and wall/post height to 10 feet) · Group U accessory structure exemption roof area: <= 380 sq ft (floor/column area also limited to 240 square feet and wall/post height to 10 feet) · Group U accessory structure exemption wall/post height: <= 10 ft (single- or two-point post bearing shade structures are not included)
“Permits are required for the erection, construction, enlargement, alteration, repair, moving, improvement, demolition or conversion of any building or structure, except as follows:”
Building and Safety FAQs ↗Re-checked Sep 24, 2026
Owner-builder exemptionAvailable (with conditions)
Property owners applying for Fresno County owner-builder construction permits in unincorporated Fresno County.
- Before a building permit is issued, the owner-builder form must be completed and signed by the property owner and returned to the permit-issuing agency.
- A copy of the property owner's driver's license, notarization, or other agency-acceptable verification is required when the permit is issued to verify the signature.
- An owner may perform all or portions of the work, or may contract exclusively with licensed contractors, under the cited California Business and Professions Code Section 7044 exemptions.
- For owner-performed work, the structure must not be intended or offered for sale; if sold within one year, the owner-builder bears the burden of proving it was not built or improved for sale.
- The owner-builder is legally and financially responsible for the construction activity and must comply with applicable owner-builder and employer laws.
- A personal residence exception applies to the one-year residence requirement stated in the form; otherwise, an owner-builder cannot legally sell a structure not constructed entirely by licensed contractors.
- If an agent applies, the property owner must complete the authorization and provide required verification.
- Workers' compensation coverage and employment-law obligations may apply; the form warns of criminal penalties and civil fines up to $100,000 for failure to secure coverage.
civil penalty under Business and Professions Code Section 7031.5: <= 500 USD (For a violation of the contractor-license declaration requirement) · owner-builder sale timing: 1 year after completion (Owner-builder bears the burden of proving the work was not built or improved for sale) · workers compensation civil fine warning: <= 100000 USD (In addition to possible criminal penalties and other listed costs)
“I hereby affirm under penalty of perjury that I am exempt from the Contractors’ State License Law for the reason(s) indicated below”
F174 Owner Builder Form ↗Re-checked Sep 24, 2026
Building code adoptedAdopted (with conditions)
Building-code requirements administered by Fresno County for construction subject to County permitting and code enforcement.
- The County Title 15 ordinance states that the 2022 California Building Code and referenced appendices are adopted by reference.
- The County's December 8, 2025 bulletin states that the 2025 California Building Standards Code becomes effective January 1, 2026.
- Permits for projects approved under the 2022 CBSC had to be issued before December 31, 2025 or before plan-review expiration; applications after December 31, 2025 must conform to the new code provisions.
- Existing standard-plan permits issued between January 1, 2023 and December 31, 2025 remain in effect for 12 months from issuance; if they expire without construction commencing, they become subject to the 2025 CBSC.
2025 California Building Standards Code effective date: 2026-01-01
“The 2025 California Building Standards Code (CBSC) will become effective January 1, 2026. [...] Permit applications after Wednesday, December 31, 2025, shall not be issued until such time plans are in conformance to the new code provisions.”
Fresno County Ordinance Code Title 15 - Building Code ↗Re-checked Sep 24, 2026
Certificate of occupancyRequired
Buildings, uses of buildings, and changes in use governed by Fresno County Zoning Ordinance Section 863 in unincorporated Fresno County.
- Section 863 states that its conditions apply to all buildings and uses, subject to the exceptions in Section 861-B.
- A certificate must be applied for concurrently with the building-permit application.
- The building, enlargement, or alteration must be completed in conformity with the applicable division, approved site plan, and required conditions, and the proposed use must conform to the division and required conditions.
- A legally existing use may continue, but a change in use requires a certificate after a conformity finding.
- A certificate is required before vacant land is used or an existing land use is changed when the use conforms to the applicable division and required conditions.
- No certificate is required when land is used for tilling soil and growing farm, garden, or orchard products.
- The Department of Resources and Development must file a record within five days after issuance.
- The ordinance states it was amended by Ordinance T-252 adopted 12/09/1980.
certificate record filing deadline: <= 5 days (After issuance)
“No building hereafter erected, moved, enlarged or altered shall be occupied, used, or changed in use until after a certificate of occupancy shall have been issued”
Section 863: Certificates of Occupancy ↗Re-checked Sep 24, 2026
County-wide zoningPresent (with conditions)
Land uses, structures, and development in unincorporated Fresno County.
- The ordinance implements the Fresno County General Plan and applicable specific plans.
- Incorporated municipalities may apply their own municipal zoning rules.
“This Zoning Ordinance classifies and regulates the highest and best use of structures and land located in the unincorporated area of Fresno County in a manner consistent with the Fresno County General Plan, including all of its elements, and any applicable specific plans.”
Fresno County Ordinance Code - Division 6, Zoning Ordinance ↗Re-checked Sep 24, 2026
Local zoningVaries (with conditions)
Aggregate of zoning controls across Fresno County, including County zoning for unincorporated areas and municipal zoning within incorporated cities.
- The County ordinance applies to the unincorporated area.
- The City of Fresno administers its own City zoning ordinance and development code within the City of Fresno.
- Parcel-specific rules depend on the responsible local jurisdiction and applicable zoning district or plan.
“The purpose of the City’s Zoning Ordinance is to encourage, classify, designate, regulate, restrict, the highest and best location for, and use of, buildings, structures, and land for agriculture, residence, commerce, trade, industry, water conservation, or other purposes in appropriate places.”
Fresno County Ordinance Code - Division 6, Zoning Ordinance ↗Re-checked Sep 24, 2026
Minimum lot sizeDistrict specific (with conditions)
Newly created parcels in unincorporated Fresno County zoning districts.
- Requirements vary by county zone district.
- AE and AL zones require 20 acres or the stated acreage designation of 20, 40, 80, 160, 320, or 640 acres, except as provided for homesites under Section 822.3.080.F.
- R-1-A and R-1-AH require 20,000 square feet; R-1-B requires 12,500 square feet, or 18,500 square feet within the Fig Garden Neighborhood Plan when designated Low Density Residential.
- R-1 requires 6,000 square feet; R-2 and R-2-A require 6,600 square feet; R-3 and R-3-A require 7,500 square feet.
- Other zone-specific frontage, depth, density, subdivision, health, and state-law requirements may also apply.
AE/AL minimum parcel size: 20, 40, 80, 160, 320, or 640 acres (Except as provided for homesites under Section 822.3.080.F) · R-1-A/R-1-AH minimum parcel size: 20000 square feet · R-1-B minimum parcel size: 12500 square feet (18,500 square feet within the Fig Garden Neighborhood Plan when designated Low Density Residential) · R-1 minimum parcel size: 6000 square feet · R-2/R-2-A minimum parcel size: 6600 square feet · R-3/R-3-A minimum parcel size: 7500 square feet
“Minimum Parcel Size 6,000 sq. ft. 6,600 sq. ft.”
Fresno County Zoning Ordinance Article 2: Zones, Allowable Land Uses, and Zone-Specific Standards ↗Re-checked Sep 24, 2026
SetbacksDistrict specific (with conditions)
Primary structures and applicable accessory structures in unincorporated Fresno County zoning districts.
- Minimum setbacks vary by zone district and are subject to Section 822.3.100 measurement rules, allowed projections, and exceptions.
- The ordinance states that minimum setback requirements apply to all uses except fences or walls within height limits and retaining walls less than three feet above finished grade.
- Recorded final maps, parcel maps, and records of survey maps may establish the required street and yard setback distances; additional road dedication can affect the applicable setback.
R-1-A/R-1-AH front setback: 35 feet (25 feet for front curve lots/cul-de-sacs) · R-1-A/R-1-AH side setback each: 10 feet · R-1-A/R-1-AH rear setback: 20 feet · R-1/R-2/R-2-A front setback: 20 feet (20 feet for front curve lots/cul-de-sacs) · R-1/R-2/R-2-A side setback each: 5 feet · R-1/R-2/R-2-A rear setback: 20 feet · AE/AL front setback: 35 feet · AE/AL side setback each: 20 feet · AE/AL rear setback: 20 feet
“Front 20 ft. 20 ft. [...] Side (each) 5 ft. 5 ft”
Fresno County Zoning Ordinance Article 2: Zones, Allowable Land Uses, and Zone-Specific Standards ↗Re-checked Sep 24, 2026
Well permitRequired
Construction, reconstruction, or deepening of private domestic, agricultural, and public water wells in unincorporated Fresno County
- Fresno County issues construction permits to licensed well drillers.
- The County FAQ states that no permit to operate a private water well is required, which is distinct from the construction permit requirement.
- The County only issues these water-well construction permits for unincorporated areas; incorporated cities may impose their own requirements.
- Public water wells are subject to additional public-water-system requirements.
“The Environmental Health Division issues permits to construct new wells, reconstruct, repair or deepen existing wells and destroy abandoned wells to properly licensed well drilling contractors in unincorporated Fresno County. For well issues within any of the incorporated cities in the County, please contact the city in question directly.”
Environmental Health FAQ ↗Re-checked Sep 24, 2026
Mandatory utility hookupConditional
Utility and wastewater connections for a new ADU in eligible unincorporated Fresno County areas
- If the primary residence has septic, the new ADU requires a separate septic system.
- If the primary residence is connected to sewer, the ADU may connect to the primary residence waste system if existing waste piping is sufficiently sized.
- A separate sewer tie-in is also possible.
- The local utility provider must be consulted for further information and costs.
- The County page states that ADUs are currently not allowed within low water areas.
“If the primary residence has a septic system, a new ADU will need a separate septic system installed. If the primary residence is connected to a sewer system, the new ADU can be connected to the primary residence waste system between the existing house and sewer connection. The existing waste piping must be of sufficient size to accommodate the additional fixtures of the new ADU. A separate sewer tie in is also a possibility. Consult with the local utility provider for further information and costs.”
Accessory Dwelling Unit (ADU) ↗Re-checked Sep 24, 2026
Agricultural exemptionAvailable (with conditions)
Specified agricultural structures and agricultural storage tanks subject to Fresno County building-permit exemptions.
- California Building Code exemptions include shade cloth structures constructed for nursery or agricultural purposes, but not service systems.
- Fresno County Title 15 Section 15.08.020 adds transportable gypsum and fertilizer storage tanks for agricultural use.
- Detached one-story Group U accessory structures may qualify only when they do not exceed 240 square feet of floor/column area, 380 square feet of roof area, and a 10-foot wall or post height; shade structures with single- or two-point post-bearing members are excluded.
- Applicants claiming the Group U exemption must comply with Title 15 Section 15.08.030.
- The Group U exemption is applied for through the Citizens Portal like a normal construction permit and requires a detailed site plan, elevation sheet, operational statement, owner-builder disclosure or valid contractor license number, a $153.44 permit cost plus a $21.85 internet fee for online permits, possible grading fees, and a waste-management plan.
agricultural shade-cloth structure permit exemption: available (Does not include service systems) · transportable gypsum or fertilizer storage tanks: available (Agricultural use) · Group U accessory structure floor/column area: <= 240 square feet · Group U accessory structure roof area: <= 380 square feet · Group U accessory structure wall or post height: <= 10 feet (Shade structures with single- or two-point post-bearing members are not included) · Group U exemption permit cost: 153.44 USD (A $21.85 internet fee is added for permits applied for online)
“Shade cloth structures constructed for nursery or agricultural purposes, not including service systems.”
Building and Safety FAQs ↗Re-checked Sep 24, 2026
Subdividing landRegulated (with conditions)
Subdivision of real property into smaller lots in unincorporated Fresno County, including tentative tract map processing.
- A tentative tract map is generally used to create five or more lots.
- The subdivision design and improvements concerning roads, curb, gutter, sewer, water, and drainage are addressed during application processing.
- State and local laws require preparation by a licensed land surveyor or registered civil engineer.
- Approval requires a public hearing before the Planning Commission, with notice mailed to surrounding property owners within 300 feet.
- Required findings include consistency with the General Plan and applicable Specific Plans, physical suitability, environmental and public-health considerations, and consistency with public easements.
- A 15-day appeal period applies after the Planning Commission decision.
- All conditions of approval must be satisfied before recording a Final Map.
typical tentative tract map lot threshold: >= 5 lots (Generally; other land-division procedures may apply) · surrounding-owner hearing notice distance: 300 feet · appeal period: 15 days · typical processing time: >= 90 days (May be extended by additional information, special studies, project complexity, or an Environmental Impact Report)
“A Tentative Tract Map (TT) is one process used to subdivide real property into smaller lots.”
Tentative Tract Map ↗Re-checked Sep 24, 2026
Building in a floodplainLimited
Construction or remodeling within a Special Flood Hazard Area in Fresno County.
- Additional building codes and ordinances apply.
- A building permit and/or grading permit must be obtained before construction.
- Licensed contractors, engineers, and architects must be used.
- The County identifies the Fresno County Flood Hazard Ordinance and California Residential Code R322 as applicable references.
“make sure to get a Building Permit and/or Grading Permit before you build and only use Licensed Contractors, Engineers, and Architects.”
Flood Protection and Planning - County of Fresno ↗Re-checked Sep 24, 2026
Permit feesPublished (with conditions)
County building-permit fees for projects administered by Fresno County in unincorporated Fresno County.
- Fees increase by 3% on 2026-07-01 under Ordinance 24-005.
- The page directs applicants to the Master Schedule of Fees (FY 26-27) for fees in effect.
fee increase: 3 percent · effective date of fee increase: 2026-07-01
“fees will increase by 3% on 07/01/2026. Please see the most recent Master Schedule of Fees (FY 26-27) for fees that will be in effect.”
Building & Safety - County of Fresno ↗Re-checked Sep 24, 2026
Permit processPublished (with conditions)
Post-entitlement permits for majority-residential or entirely residential projects administered by Fresno County.
- Application completeness must be determined within 15 days of receipt.
- Project review must be completed within 30 days for projects of 25 units or fewer.
- Project review must be completed within 60 days for projects of 26 units or more.
- The County must provide an online permit application system.
- Required submittals include residential plan checklists, permit application forms, grading materials, and applicable planning applications.
application completeness deadline: 15 days (from receipt of application) · project review deadline: 30 days (projects of 25 units or fewer) · project review deadline: 60 days (projects of 26 units or more)
“application is complete within 15 days [...] project review must be completed within 30 days [...] and within 60 days for projects 26 units or more.”
Building Permit Requirements per Assembly Bill 2234 - County of Fresno ↗Re-checked Sep 24, 2026

California rules that apply here

InspectionsRequired
Construction projects within HCAI jurisdiction involving California health facilities.
- HCAI field personnel make periodic site visits.
- The Inspector of Record is responsible for continuous inspection of the work.
- The inspections address seismic, fire, life-safety, and other building-code requirements.
“The approved IOR with the required personal knowledge performs only those duties associated with the required continuous inspections”
HCAI Standard Project Process ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- Required — California owner-builder projects addressed by the Contractors State License Board guidance.
  “Your project must pass codes and building inspections.”
  Owner-Builder Responsibilities ↗Re-checked Sep 26, 2026
Zoning districtsPartial
California city and county zoning codes and the zoning districts established by those local jurisdictions.
- The city or county zoning code implements general-plan policies at the individual-parcel level.
- Local zoning codes identify allowed land uses in the jurisdiction’s zoning districts.
- Since 1971, state law requires city or county zoning codes to be consistent with the jurisdiction’s general plan, except in charter cities.
- The source does not publish a statewide list of parcel-specific zoning districts; the applicable local jurisdiction must be consulted.
“The zoning code presents standards for different land uses and identifies which land uses [...] are allowed in the various zoning districts of the jurisdiction.”
Chrome Plating Amendments Environmental and Regulatory Setting ↗Re-checked Sep 26, 2026
Minimum dwelling sizeSpecified
Efficiency units permitted by a California city, county, or city and county.
- The local jurisdiction must adopt an ordinance permitting the efficiency unit.
- Occupancy is limited to no more than two persons.
- The unit may have partial kitchen or bathroom facilities as specified by the local ordinance.
- All other applicable minimum standards under Health and Safety Code Part 1.5 continue to apply.
minimum floor area: >= 150 square feet · maximum occupancy: <= 2 persons
“Notwithstanding Sections 17922, 17958, and 17958.5, a city, county, or city and county may, by ordinance, permit efficiency units for occupancy by no more than two persons which have a minimum floor area of 150 square feet and which may also have partial kitchen or bathroom facilities, as specified by the ordinance.”
California Health and Safety Code Section 17958.1 ↗Re-checked Sep 9, 2026
Living in an RVTemporary only (with conditions)
Occupancy of recreational vehicles as residential units in California.
- RVs are not intended for occupancy as permanent dwellings.
- Unless a local ordinance allows otherwise, RV occupancy generally is limited to mobilehome parks or special occupancy parks governed by the Mobilehome Parks Act or Special Occupancy Parks Act.
- Applicable state or local approval and enforcement requirements depend on the RV's location and classification.
maximum gross area: <= 400 square feet (Measured at maximum horizontal projections; internal living room area must be less than 320 square feet excluding specified built-in equipment and bath/toilet rooms.)
“RVs are not intended for occupancy as a permanent dwelling. [...] Unless otherwise allowed by a local ordinance, RVs generally may be occupied only in mobilehome parks or special occupancy parks”
Information Bulletin 2016-01: Tiny Homes ↗Re-checked Sep 9, 2026
Camping on your landLimited
Camping in units operated by the California Department of Parks and Recreation statewide.
- Camping is confined to areas designated for that purpose.
- Occupancy by the same persons, equipment, or vehicles is generally limited to 30 days in any calendar year in that unit.
- The Department may establish shorter or longer occupancy limits.
- When a shorter seasonal limit applies, the camper must vacate the campsite and may not reregister in the unit until 48 hours have expired, measured from 12:00 noon on the checkout day to 12:00 noon on the second day following.
- A district superintendent may permit one-night camping in a day-use area or portion of one, subject to Department-established fees and vehicle limitations; occupants must vacate by 9:00 a.m. the following morning.
- California State Parks' current reservation policy states that each campground has a consecutive-night limit, requires a 48-hour absence after that limit, and generally has a 30-night annual maximum, subject to individual park policies.
general annual occupancy limit: 30 days per calendar year per unit (The Department may establish shorter or longer limits of occupancy.) · return interval after shorter seasonal limit: 48 hours (Measured from 12:00 noon of the checkout day to 12:00 noon of the second day following.) · one-night camping in day-use area: 1 night (Only if permitted by the district superintendent; occupants must vacate by 9:00 a.m. the following morning.)
“Occupancy by the same persons, equipment, or vehicles of any camping facility is limited to a total of 30 days in any calendar year in that unit.”
California Off-Highway Motor Vehicle Laws 2014 ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- Allowed (with conditions) — Temporary camping in California special occupancy parks, including parks containing recreational vehicles, tents, or camping cabins.
  ““Special occupancy park” means a recreational vehicle park, temporary recreational vehicle park, incidental camping area, or tent camp.”
  What is a Mobilehome Park or Special Occupancy Park? ↗Re-checked Sep 26, 2026
Tiny homesAllowed (with conditions)
Occupancy of a structure marketed or described as a tiny home in California.
- The tiny home must comply with applicable standards and be approved as a HUD-Code manufactured home, California Residential or Building Code home, factory-built housing, recreational vehicle, park trailer, or camping cabin.
- The location must be approved for the applicable classification.
- A tiny home that does not fit one of those classifications and does not comply with the California Building Standards Code is a noncomplying structure whose occupancy is illegal.
- Approving and enforcing agencies vary depending on whether the unit is inside or outside a mobilehome or special occupancy park.
park trailer or RV gross area limit: <= 400 square feet (Applicable classification-specific exclusions and standards apply.)
“In order to be occupied, a tiny home must comply with the standards of, and be approved as one of the following types of structures: a HUD-Code manufactured home (MH), California Residential Code or California Building Code home, factory-built housing (FBH), recreational vehicle (RV), park trailer (PT) or camping cabin (CC).”
Information Bulletin 2016-01: Tiny Homes ↗Re-checked Sep 9, 2026
Manufactured homesAllowed (with conditions)
Occupancy of manufactured homes inside or outside mobilehome parks in California.
- The manufactured home must satisfy applicable federal standards and California Manufactured Housing Act and Title 25 requirements.
- Installation and approval for occupancy are governed by the Mobilehome Parks Act.
- HCD or a local enforcement agency with assumed Mobilehome Parks Act authority is responsible for ensuring compliance with statutory construction and maintenance requirements.
- Local agency approvals may be necessary for the project.
minimum width for a new manufactured home: >= 8 body feet (The statutory definition also includes units at least 40 body feet in length.) · minimum erected floor area for a new manufactured home: >= 320 square feet
“MHs may be occupied outside or inside of mobilehome parks and installation and approval for occupancy is governed by the Mobilehome Parks Act (MPA), HSC Sections 18200, et seq., and Title 25, CCR Sections 1000, et seq.”
Information Bulletin 2016-01: Tiny Homes ↗Re-checked Sep 9, 2026
Accessory dwellingsAllowed (with conditions)
ADUs and junior ADUs subject to California State ADU Law.
- Approval is ministerial and without discretionary review or a hearing.
- Development standards must be objective and knowable in advance.
- The local permitting agency must determine application completeness and provide written notice within 15 business days.
- If an application is incomplete, the agency must identify missing items and explain how to complete it.
- Local site, building, health, safety, fire, utility, and other applicable requirements continue to apply.
written completeness determination: <= 15 business days (Measured from the permitting agency's receipt of the application.) · final written determination after appeal: <= 60 business days (Applies after receipt of the written appeal.)
“A permit application for an accessory dwelling unit shall be considered and approved ministerially without discretionary review or a hearing [...] A permitting agency shall determine whether an application to create or serve an accessory dwelling unit is complete and provide written notice of this determination to the applicant not later than 15 business days after the permitting agency received the application.”
Accessory Dwelling Unit Handbook March 2026 ↗Re-checked Sep 9, 2026
Who permits septicMixed (with conditions)
California onsite wastewater treatment systems, including septic systems primarily treating domestic wastewater through subsurface disposal.
- The State Water Resources Control Board establishes the statewide OWTS Policy.
- Local agencies, such as county environmental health departments, issue OWTS permits under the statewide policy.
- Local Agency Management Programs may establish locally tailored siting and design standards.
OWTS Policy effective date: 2013-05-13 (Except for Tier 3, local agencies could continue existing permitting programs for 60 months after the effective date.) · Tier 1 maximum flow: <= 3500 gallons per day (Applies to qualifying new or replacement OWTS where no approved LAMP applies.) · Tier 2 maximum flow: <= 10000 gallons per day (Applies under an approved LAMP.)
“The State Water Resources Control Board [...] adopted the OWTS Policy in June 2012. The OWTS Policy authorizes local agencies [...] to issue OWTS permits.”
Onsite Waste Water Treatment Systems ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- Mixed (with conditions) — Statewide regulation and management of onsite wastewater treatment systems, commonly known as septic systems.
  “Implementation of the OWTS Policy will be overseen by the State Water Board and the regional water quality control boards”
  Water Quality Control Policy for Siting, Design, Operation and Maintenance of Onsite Wastewater Treatment Systems (OWTS Policy) ↗Re-checked Sep 9, 2026
Septic permitLimited
New, replacement, and corrective-action OWTS in California; existing properly functioning systems may fall under Tier 0 rather than new/replacement permitting requirements.
- Tier 1 applies to qualifying new or replacement OWTS when no Regional Water Board-approved LAMP exists, with a maximum flow of 3,500 gallons per day.
- Tier 2 applies to qualifying new or replacement OWTS under an approved LAMP, with a maximum flow of 10,000 gallons per day.
- Tier 3 applies near impaired surface waters subject to a TMDL, a special LAMP provision, or within 600 feet of a water body listed on OWTS Policy Attachment 2; supplemental treatment may apply.
- Tier 4 applies to systems that are not properly functioning and require corrective action.
- Local agencies issue the permits and local LAMP requirements may differ from Tier 1.
Tier 1 maximum flow: <= 3500 gallons per day (Qualifying new or replacement OWTS without an approved LAMP.) · Tier 2 maximum flow: <= 10000 gallons per day (Qualifying new or replacement OWTS under an approved LAMP.) · Tier 3 water-body setback: <= 600 feet (Applies to a water body listed on OWTS Policy Attachment 2.)
“Tier 1 applies when a Local Agency Management Program (LAMP) has not been approved by the Regional Water Board. Maximum flow rate is 3,500 gpd.”
Onsite Waste Water Treatment Systems ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- Required — New and replacement onsite wastewater treatment systems (OWTS), commonly known as septic systems, statewide in California.
  “Every new or replacement septic system requires a permit, either through your local jurisdiction (City or County) OR from the Central Coast Water Board.”
  2023 OWTS Policy ↗Re-checked Sep 26, 2026
Septic inspectionLimited
OWTS in a Tier 3 Advanced Protection Management Program with supplemental treatment components, including systems in specified impaired-water-body areas statewide.
- The requirement applies to OWTS in an Advanced Protection Management Program with supplemental treatment components.
- Ongoing monitoring must follow the OWTS operation and maintenance manual or occur more frequently if required by the local agency or Regional Water Board.
- Where telemetry is not possible, the owner or owner's agent must inspect at least monthly while the system is in use and notify the service provider at least quarterly of observed operating parameters.
- For systems designed to meet disinfection requirements, a service provider must inspect proper operation quarterly while the system is in use unless continuous telemetric monitoring is capable of assessing operation.
- Quarterly effluent sampling and certified-laboratory requirements apply to systems subject to the disinfection provisions.
inspection frequency where telemetry is not possible: per monthly (While the system is in use.) · inspection frequency for disinfection systems: per quarterly (While the system is in use, unless continuous telemetric monitoring is capable of assessing operation.)
“Where telemetry is not possible, the owner or owner’s agent shall inspect the system at least monthly while the system is in use as directed and instructed by a service provider and notify the service provider not less than quarterly of the observed operating parameters of the OWTS. [...] OWTS in an Advanced Protection Management Program designed to meet the disinfection requirements in Section 10.10 shall be inspected for proper operation quarterly while the system is in use by a service provider unless a telemetric monitoring system is capable of continuously assessing the operation of the disinfection system.”
2023 OWTS Policy ↗Re-checked Sep 26, 2026
Driveway accessRequired
Driveways and driveway connections involving proposed encroachments within, under, or over State highway rights of way.
- The requirement applies to proposed activities related to placement of encroachments within, under, or over State highway rights of way.
- Applications are submitted to the appropriate District Encroachment Permits Office having jurisdictional authority over the site.
- Local or other agency requirements may also apply outside State highway rights of way.
“An encroachment permit must be obtained for all proposed activities related to the placement of encroachments within, under, or over the State highway rights of way.”
Encroachment Permits | Caltrans ↗Re-checked Sep 26, 2026
Campground & park staysLimited
Occupancy and use of manufactured homes and mobilehomes in California mobilehome parks and other locations subject to HCD jurisdiction.
- HCD administers titling and registration for manufactured homes and mobilehomes.
- HCD-inspected mobilehome parks are subject to health and safety enforcement where local government has not assumed enforcement.
- Manufactured/mobilehome park regulations address construction, use, maintenance, and occupancy.
- Separate local land-use, building, fire, health, and utility requirements may apply.
“MHs may be occupied outside or inside of mobilehome parks and installation and approval for occupancy is governed by the Mobilehome Parks Act (MPA), HSC Sections 18200, et seq., and Title 25, CCR Sections 1000, et seq.”
Manufactured & Mobilehomes ↗Re-checked Sep 26, 2026
2 more reviewed findings on this topic
- Limited — RV and trailer camping at Silver Strand State Beach Campground in the San Diego Coast District.
  “Camping Stay Limits: Applies to persons, equipment, or vehicles and any combination thereof [...] Maximum stay of 30 days per calendar year [...] Maximum 7 consecutive days during peak season (May 15 – September 15) [...] Maximum 14 consecutive days during non-peak season”
  Silver Strand State Beach Campground Rules and Regulations ↗Re-checked Sep 9, 2026
- Limited — Occupancy and use of recreational vehicles in California special occupancy parks and designated RV sections of mobilehome parks.
  “Unless otherwise allowed by a local ordinance, RVs generally may be occupied only in mobilehome parks or special occupancy parks governed by the Mobilehome Parks Act”
  What is a Mobilehome Park or Special Occupancy Park? ↗Re-checked Sep 26, 2026
county zoning authorityGeneral
California county legislative bodies' authority to adopt zoning ordinances regulating buildings, structures, land uses, lots, yards, open space, lot coverage, intensity of use, parking, loading, and setbacks within county jurisdiction, including unincorporated areas.
- The authority is exercised pursuant to Government Code Chapter 4, Zoning Regulations.
- The statute separately authorizes city legislative bodies; incorporated municipalities may exercise their own zoning authority.
- Government Code Section 65850 also lists authority to regulate signs and billboards, building and structure location, height, bulk, number of stories, and size, lot and open-space size and use, lot coverage, intensity of land use, offstreet parking and loading, and building setback lines.
- The cited section states it was amended by Stats. 2017, Ch. 376, Sec. 1, effective January 1, 2018.
“The legislative body of any county or city may, pursuant to this chapter, adopt ordinances that do any of the following:”
California Government Code Section 65850 ↗Re-checked Sep 21, 2026
county building authorityGeneral
California counties administering and enforcing state building standards through county building departments, including residential construction in unincorporated areas.
- Each county must maintain building standards and state building regulations in the office of the building official responsible for administration and enforcement of state building standards.
- The statewide Title 24 standards apply subject to statutory exceptions and any authorized local amendments or local requirements.
- The cited HCD bulletin concerns the 2019 California Building Standards Code and its July 1, 2021 supplement; later code editions may supersede those particular edition dates.
“These codes shall be maintained in the office of the building official responsible for the administration and enforcement of state building standards”
Information Bulletin 2021-02: 2019 California Building Standards Code Supplement ↗Re-checked Sep 26, 2026

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

Short-term rentals — Short-term rental operation in unincorporated Fresno County.

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Water rights & wells in Fresno County

Whether a new home can legally get its own water here — the sub-state groundwater regime, from California’s water agency.

Over-appropriated / declining

The aquifer here is over-appropriated and declining. A domestic well is usually still permit-exempt, but long-term supply is a genuine risk.

Household wellPermit required — restricted

California requires no STATE permit for a domestic well — wells are permitted by the county — but under SGMA a Groundwater Sustainability Agency can meter or restrict new wells in medium/high-priority and critically overdrafted basins, and Executive Order N-7-22 requires counties in those basins to get GSA verification that a new well is consistent with the Groundwater Sustainability Plan before permitting.

Limit: 2 acre-feet/year de minimis under SGMA (Water Code §10721(e)) — largely exempt from GSA metering/fees

California DWR / State Water Board — SGMA de minimis & EO N-7-22 Action 9 FAQ ↗

Kings Subbasin — Critically Overdraftedmajority of county
Kings River fan; adopted GSP with pumping reductions; new wells subject to GSA review/metering and EO N-7-22.
California DWR Bulletin 118 — Critically Overdrafted Basins ↗
Delta-Mendota Subbasin — Critically Overdraftedpartial of county
West-side valley subbasin; adopted GSP with pumping reductions; new wells subject to GSA review and EO N-7-22.
California DWR Bulletin 118 — Critically Overdrafted Basins ↗
Westside Subbasin — Critically Overdraftedpartial of county
West-side chronic subsidence; GSP pumping reductions; new wells subject to GSA review and EO N-7-22.
California DWR Bulletin 118 — Critically Overdrafted Basins ↗

Hybrid state (appropriation + riparian). Groundwater rules change and basin boundaries follow the aquifer, not the county line — confirm current well and appropriation rules with the California state water agency before you buy or drill.Groundwater governance as of Jul 2026, cited to each administering agency.

Living off-grid in Fresno County, California

Is Fresno County a good place to live off-grid or homestead?

Fresno County scores 48/100 on the Bolthole Index, a solid county profile. Watch-outs: elevated mid-century heat, water, rain, or wildfire exposure and thin water margin (19.4″/yr rainfall).

Do you need a building permit in Fresno County, California?

Fresno County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Fresno County Environmental Health Department (Public Health). Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

Can you live in an RV or tiny home on your land in Fresno County?

Living in an RV on your own land in Fresno County is allowed on a temporary basis only: Statewide rule. Occupancy of recreational vehicles as residential units in California. RVs are not intended for occupancy as permanent dwellings. Unless a local ordinance allows otherwise, RV occupancy generally is limited to mobilehome parks or special occupancy parks governed by the Mobilehome Parks Act or Special Occupancy Parks Act. A tiny home is allowed. Confirm with the county before relying on it.

How much does land cost in Fresno County, California?

Land in Fresno County runs about $16,378 per acre, based on the latest county data.

What is the water situation in Fresno County?

Fresno County gets about 19.4" of rain a year, with severe drought in roughly 40.3% of years. On water rights, Fresno County lies in the Kings Subbasin — Critically Overdrafted — Kings River fan; adopted GSP with pumping reductions; new wells subject to GSA review/metering and EO N-7-22..

How remote is Fresno County?

A representative private-land location has about 3,708 people within a 30-minute drive and 3,608,466 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

Building permits, zoning and land rules in Fresno County, California

At a glance

Who to call

Do you need a building permit in unincorporated Fresno County?

Who is the Fresno County building department and how do you reach them?

Does Fresno County have zoning?

How do septic and well permits work in Fresno County?

Can you live in an RV or tiny home in Fresno County?

Building a home in Fresno County: the steps, in order

What to check before you buy land in Fresno County

Watch-outs

Sources

Fresno County in California

How Fresno County scores

Find land. Bring the promising ones back.

Parcel due diligence

Answers from the rulebook for Fresno County

Fresno County rules

California rules that apply here

Still unanswered

Water rights & wells in Fresno County

Living off-grid in Fresno County, California

Is Fresno County a good place to live off-grid or homestead?

Do you need a building permit in Fresno County, California?

Can you live in an RV or tiny home on your land in Fresno County?

How much does land cost in Fresno County, California?

What is the water situation in Fresno County?

How remote is Fresno County?

How Fresno compares in California