Bolthole Index

Nevada County, California

Building permits, zoning and septic rules in Nevada County, California

55Index Score / 100
#5 of 58 in California

Nevada County, California requires a building permit for construction in the unincorporated county, including a dedicated owner-built pathway for limited density rural dwellings that took effect February 13, 202512. County zoning, administered through the Nevada County Zoning Regulations, governs unincorporated land, while the separate, similarly named City of Nevada City runs its own zoning inside city limits34. Septic (OWTS) permits go through the county's own Environmental Health Department, which requires a soils evaluation before a new-residence building permit can be issued5.

At a glance

Building permit
Required for unincorporated construction; a dedicated owner-built permit path exists for qualifying rural dwellings12
Zoning
Countywide for unincorporated land under the Nevada County Zoning Regulations; the City of Nevada City has its own separate zoning34
Septic
Nevada County Environmental Health Department issues OWTS permits after a soils evaluation5
Owner-builder
Yes: the county's rural-dwelling ordinance lets a property owner hold the permit directly, and separately, state law exempts qualifying owner-builders from contractor licensing67
Tiny Homes on Wheels
Allowed as a single-family dwelling, ADU or dwelling group under a 2025 county ordinance, up to 400 sq ft plus a qualifying loft8
RV as a residence
Generally limited to mobilehome or special occupancy parks under state law unless a local ordinance allows otherwise9
Minimum lot size (RA)
1.5 acres with public water or sewer, 3 acres with private water and sewer10
Building height
35 feet or 3 stories, whichever is less, in the RA and R1 districts11

Who to call

Building permits

Nevada County Building Department (Community Development Agency)

Building permit intake, plan check, and construction inspections for unincorporated Nevada County, including the owner-built rural dwelling permit path

530-265-1222

950 Maidu Avenue, Suite 170, Nevada City, CA 95959

Online permits →

Zoning

Nevada County Planning Department (Community Development Agency)

Zoning administration, land-use permits and zoning-district determinations for unincorporated Nevada County

530-265-1222

950 Maidu Avenue, Nevada City, CA 95959

Septic permits

Nevada County Environmental Health Department (Community Development Agency)

Onsite wastewater treatment system (OWTS/septic) permits, soils evaluations, and drinking-water-well regulation for Nevada County

530-265-1222

950 Maidu Avenue, Nevada City, CA 95959

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 Nevada County, California?

Yes: unincorporated Nevada County requires a building permit for construction, and the county has a dedicated permit path for limited density owner-built rural dwellings on qualifying parcels that became operative February 13, 202512. To qualify, the parcel must be in an unincorporated rural area and meet the ordinance's General Plan, zoning, sewage-disposal-setback and CC&R criteria, and Environmental Health must approve the private sewage disposal plan as part of the application2. Statewide, California's 2025 Building Standards Code applies to permit applications filed on or after January 1, 2026, and no building or structure may be built, enlarged or altered anywhere in the state without a separate permit from the local building official1213. A permit issued under the county's rural-dwelling ordinance is valid for three years from issuance, with one-year extensions available2.

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

The Nevada County Building Department, part of the Community Development Agency, processes applications at the Permit Processing Center at the County Administrative Center, 950 Maidu Avenue, Suite 170, Nevada City; call 530-265-122214. A standard application needs three complete sets of construction plans, three site plans, plan-check fees paid at submittal, and, for a new dwelling, two sets of septic design with a site plan15. Nevada County publishes separate schedules for building, plan review and inspection, environmental health, planning, public works, surveyor and traffic-mitigation fees; its current schedule took effect September 1, 202616. Inspections, including foundation/setbacks, roof sheathing and shear, rough, and final, require the applicant to request them and provide access at least 48 hours in advance17. Once work is complete and approved, the building official issues a Certificate of Occupancy; a temporary certificate is available before full completion if approved sanitary facilities exist and safety standards are met, for a $185.48 processing fee plus a bond of at least $1 per square foot up to $2,00018.

Does Nevada County have zoning, and is it the same as Nevada City's?

Nevada County's Zoning Regulations apply to all land uses and development within the unincorporated county, and the county publishes maps showing property-specific zoning boundaries and codes31920. The incorporated City of Nevada City applies its own zoning code, so confirm which government controls an address before using either set of rules4. In the county's Residential Agriculture (RA) and Single-Family (R1) districts, minimum parcel size runs from 10,000 square feet with public water and sewer up to 3 acres with private water and sewer, minimum road frontage is 120 feet in RA and 60 feet in R1, maximum building height is 35 feet or three stories, and maximum impervious surface is capped at 30% in RA and 40% in R1101121. Front-yard setbacks in these districts are generally 20 feet from a road right-of-way at least 50 feet wide, with interior and rear yards at 30 feet, though setbacks may be reduced on parcels under three acres under the ordinance's exceptions section22. We could not confirm a general minimum dwelling floor area for unincorporated Nevada County; ask the Planning Department about the parcel's zoning and any project-specific standard before designing a home.

How do septic permits work in Nevada County?

The Nevada County Environmental Health Department issues onsite wastewater treatment system (OWTS) permits and requires an On-Site Soils Evaluation before a new-residence building permit can move forward523. Statewide, California's OWTS Policy puts the State Water Board and regional water boards in charge of oversight while local agencies like Nevada County implement their own approved management programs24. Soils here make septic a central planning question: USDA soil survey data rates only about 0.1% of Nevada County's soils as free of severe limits for a conventional drain field, consistent with a county where under 11% of the land sits at 15% slope or less and nearly 88% is forested, steep, shallow, granitic Sierra foothill terrain that is genuinely difficult for conventional leach fields almost everywhere252627. Where a parcel is within Sanitation District 1 and public sewer is available, county rules require connecting to it instead of issuing a septic permit, and even a sub-750-square-foot ADU that's exempt from impact fees under SB 13 still owes ordinary sewer connection charges28. If you're subdividing, a site approval report for sewage disposal is generally required before the map records, unless the resulting parcels are 40 acres or larger29.

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

An ordinary RV generally can't be your residence outside a mobilehome or special occupancy park under California law, unless a local ordinance specifically allows otherwise9. Nevada County has adopted exactly that kind of local ordinance, but only for a specific category: a Tiny Home on Wheels (THOW) that carries the required state label under Health and Safety Code section 18027.3 can be used as a single-family dwelling, a second dwelling unit, a dwelling group, or an accessory dwelling unit, as long as it's no larger than 400 square feet excluding a qualifying loft and it gets zoning compliance and a building permit like any other dwelling8. If the parcel sits in a High or Very High Fire Severity Zone, or beyond the county's dead-end-road distance limit, the THOW also needs a site-specific Fire Protection Plan covering emergency access, water supply, sprinklers, defensible space and evacuation8. A plain travel trailer or motorhome without that state tiny-home label doesn't get this same path and remains subject to the general state limits on RV occupancy outside a park9.

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

  1. Confirm your parcel is in the unincorporated county, not inside the City of Nevada City or another incorporated city with its own zoning4.
  2. Check the parcel's zoning district, minimum lot size, setbacks and impervious-surface limits with the Planning Department before you finalize a site plan3010.
  3. Get a soils evaluation and septic (OWTS) approval from Environmental Health, since it's required before a new-residence building permit can be issued235.
  4. If you're building owner-built, confirm the parcel qualifies for the county's limited density owner-built rural dwelling permit path and, separately, check whether you also qualify for the state's owner-builder exemption from contractor licensing27.
  5. Submit three sets of construction plans and three site plans to the Building Department, with plan-check fees paid at submittal1415.
  6. If drilling a well, apply through a licensed California well driller; well permits are valid for one year from issuance31.
  7. Schedule required inspections with at least 48 hours' notice, and complete final inspections before requesting your Certificate of Occupancy1718.

What to check before you buy land in Nevada County

Nevada County is steep and heavily forested: only about 10.9% of the land sits at 15% slope or less, nearly 87.8% is wooded, and federal land makes up about 35.5% of the county262732. That terrain drives the septic picture directly, with only 0.1% of soils rated free of severe limits for a conventional drain field, so a soils evaluation should be one of your first calls, not a formality near closing25. The county also sees severe drought in about 34.5% of years, which is worth factoring into water-supply and wildfire planning alongside the county's own fire-severity-zone rules for structures like Tiny Homes on Wheels338. The nearest city of 100,000 or more people is about 32 miles away34. Property taxes run a relatively low effective rate around 0.7%, but the median bill is still about $4,468 a year given a typical home value around $625,332; farmland runs about $8,650 an acre35363738. If a floodplain touches the parcel, know that placing fill there needs a use permit and environmental review, and any disturbance within 100 feet of a floodplain needs a management plan39.

Watch-outs

  • Nevada County and the incorporated City of Nevada City are two separate governments with separate zoning codes on similarly named official sites (nevadacountyca.gov vs. nevadacityca.gov); confirm which one actually governs your parcel before relying on either4.
  • A new residence's building permit cannot move forward until Environmental Health approves the septic (OWTS) plan, and only about 0.1% of the county's soils are rated free of severe limits for a conventional drain field, so start the soils evaluation early525.
  • A Tiny Home on Wheels needs a site-specific Fire Protection Plan if the parcel is in a High or Very High Fire Severity Zone or beyond the county's dead-end-road limit, on top of the usual zoning and building permit8.

Sources

  1. SR 25-0038 - Ordinance 2540, Chapter 17: Limited Density Owner-Built Rural Dwellings (2026 county census)
  2. SR 25-0038 - Ordinance 2540, Chapter 17: Limited Density Owner-Built Rural Dwellings, quoted and re-checked
  3. Zoning Regulations (2026 county census)
  4. Zoning Regulations, quoted and re-checked
  5. Nevada County Environmental Health - Septic System (2026 county census)
  6. SR 25-0038 - Ordinance 2540, Chapter 17: Limited Density Owner-Built Rural Dwellings (2026 county census)
  7. California Business and Professions Code section 7044, quoted and re-checked
  8. Ordinance Allowing Tiny Homes on Wheels as Permanent Housing, quoted and re-checked
  9. Information Bulletin 2016-01: Tiny Homes (California statewide rule), quoted and re-checked
  10. Zoning Regulations, quoted and re-checked
  11. Zoning Regulations, quoted and re-checked
  12. Approved Building Standards (California statewide rule), quoted and re-checked
  13. Do I need a building permit for my project? (California statewide rule), quoted and re-checked
  14. Nevada County Building Department (Community Development Agency) (nevadacountyca.gov)
  15. Apply for a Building Permit, quoted and re-checked
  16. Fee Schedules, quoted and re-checked
  17. SR 25-0038 - Ordinance 2540, Chapter 17: Limited Density Owner-Built Rural Dwellings, quoted and re-checked
  18. SR 25-0038 - Ordinance 2540, Chapter 17: Limited Density Owner-Built Rural Dwellings, quoted and re-checked
  19. Zoning Regulations, quoted and re-checked
  20. Zoning Maps, quoted and re-checked
  21. Nevada County Code, Title 12, Chapter 2, Section 12.02.021, quoted and re-checked
  22. Zoning Regulations, quoted and re-checked
  23. Nevada County Environmental Health Department (Community Development Agency) (nevadacountyca.gov)
  24. Water Quality Control Policy for Siting, Design, Operation and Maintenance of Onsite Wastewater Treatment Systems (OWTS Policy) (California statewide rule), quoted and re-checked
  25. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
  26. Share of land at 15% slope or less: Bolthole Index county data
  27. Wooded share of land: Bolthole Index county data
  28. Sewer Connection Permit, quoted and re-checked
  29. Map Check (Parcel and Final), quoted and re-checked
  30. Nevada County Planning Department (Community Development Agency) (nevadacountyca.gov)
  31. Drinking Water Wells, quoted and re-checked
  32. Federal land share: Bolthole Index county data
  33. Share of years in severe drought: Bolthole Index county data
  34. Distance to the nearest metro area: Bolthole Index county data
  35. Effective property tax rate: Bolthole Index county data
  36. Median property tax bill: Bolthole Index county data
  37. Typical home value (Zillow): Bolthole Index county data
  38. Farmland value per acre (USDA census): Bolthole Index county data
  39. Floodplain Use Permit Guidelines, quoted and re-checked

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.

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County locator

Nevada County in California

55
County map
Nevada County highlighted among the California counties · colored by Index score

How Nevada County scores

Seclusion58100% ev.
Self-Sufficiency57100% ev.
Admin Boringness41100% ev.
Durability31100% ev.
Property Autonomy56100% ev.
Carry Cost51100% 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 →

$625kTypical home
0.7%Property tax
$8,650Land / acre
51.1"Annual rain
34.5% of yrsSevere drought
8.6 / yr (+6.3)Mid-century 100°F days
59.6 daysMid-century dry spell
3.31" (+4.9%)Mid-century 1-day rain
1.09×Wildfire change factor
100%Forward climate coverage
$2,359Home insurance / yr
6.4% / yrInsurance growth
4.64%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
16,455People within 30 min
2,868,132People within 2 hr
87,188Radius comparison (15 mi)
106.5People / sq mi
35.5%Federal land
10.9%Land at 15% slope or less
0.1%Septic soil without severe limits
700 acWorkable land screen
87.8%Wooded land
69 tonsBiomass / forest ac
52.6°FAvg temp

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Answers from the rulebook for Nevada County

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

Nevada County rules

  • Building permitRequired

    Construction of limited density owner-built rural dwellings and appurtenant structures in qualifying rural areas of unincorporated Nevada County.

    • The ordinance applies to new or existing limited density owner-built rural dwellings and appurtenant structures in rural areas.
    • Qualifying parcels must be in unincorporated areas and meet the ordinance's General Plan, zoning, sewage-disposal-setback, and CC&R criteria.
    • The permit application must include Environmental Health approval for private sewage disposal and a stipulation that the structure was or will be owner-built.
    • The ordinance became operative on 2025-02-13.
    • Permits are valid without renewal for three years from issuance; one-year extensions are available.
    • Fees are based on customary site visits, time of performance, and completion; additional fees may be assessed before permit final, and fees are set by the Board of Supervisors fee schedule.

    permit validity: 3 years from issuance (One-year extensions are available)

    “Permits shall be required for the construction of limited density owner-built rural dwellings and appurtenant structures.”
  • Owner-builder exemptionConditional

    Owner-built limited density rural dwellings and appurtenant structures on qualifying rural parcels in unincorporated Nevada County.

    • The county ordinance provides an owner-built permitting pathway, but it still requires a building permit.
    • The applicant must be the owner of the dwelling and/or property at the time of application and issuance.
    • The application must stipulate that the structure was or will be owner-built.
    • The property must meet the ordinance's rural-area criteria, including specified General Plan designations, zoning, sewage-disposal setbacks, and absence of applicable CC&Rs.
    • A private sewage disposal approval from the Environmental Health Department is required where applicable.
    “Building permits pursuant to the provisions of this Chapter may be issued for new or existing dwellings and for additions to or structures appurtenant to dwellings permitted pursuant to this Chapter to applicants who are the owners of the dwellings and/or property at the time of application for and issuance ofthe permit.”
  • InspectionsLimited

    Permitted limited density owner-built rural dwellings and appurtenant structures in qualifying rural areas of unincorporated Nevada County.

    • All construction or work for which a permit is required is subject to inspection by the building official or designee.
    • Typical dwelling inspections are foundation/setbacks, roof sheathing and shear, all rough, and final inspection.
    • Additional inspections may apply for unstable soils, concealed construction, electrical or mechanical systems, or unconventional construction methods.
    • Inspections may be waived for structures without electrical or mechanical installations, certain alterations or repairs without such installations, or when the applicant stipulates in writing that work complied with the permit and ordinance.
    • The applicant must request inspections and provide access at least 48 hours in advance.

    inspection notice: >= 48 hours

    “All construction or work for which a permit is required will be subject to inspections by the building official or designee. Typical inspections for a dwelling shall be foundation/setbacks, roof sheathing and shear, all rough and a final inspection.”
  • Certificate of occupancyRequired

    Limited density owner-built rural dwellings and appurtenant structures governed by Nevada County Code Chapter 17, Title 14.

    • After the structure is completed for occupancy, required inspections must be conducted and the work approved before issuance.
    • The certificate applies to dwellings and appurtenant structures that comply with Chapter 17.
    • Temporary occupancy may be allowed before completion if approved sanitary facilities are available, the work does not endanger life, health, or safety, and minimum health and safety standards are met.
    • For a temporary certificate of occupancy, an inspection, a $185.48 residential/commercial processing fee, and a bond of at least $1 per square foot up to $2,000 are required; final inspections by all applicable trades are required before a Certificate of Occupancy is issued.

    temporary occupancy processing fee: 185.48 USD (Residential/commercial TCO) · temporary occupancy bond: >= 1 USD per square foot (Maximum $2,000)

    “After the structures) is completed for occupancy and any inspections that have been required by the building official or designee have been conducted, and work approved, the building official or designee shall issue a Title 25 Certificate of Occupancy for such dwellings) and appurtenant structures) that comply with the provisions of this Chapter.”
  • County-wide zoningPresent (with conditions)

    All land uses and development within the unincorporated areas of Nevada County.

    • The Nevada County Zoning Regulations are the county's zoning code for unincorporated areas.
    • Ordinance provisions are minimum requirements for public safety, health, convenience, comfort, prosperity, and general welfare.
    • The cited source does not establish that the county ordinance applies inside incorporated municipalities.
    “This ordinance applies to all land uses and development within the unincorporated areas of Nevada County.”
  • Local zoningVaries (with conditions)

    Local zoning across Nevada County, aggregating county zoning for unincorporated areas and separate local controls that may apply within incorporated municipalities.

    • Nevada County zoning applies to all land uses and development within the unincorporated areas of the county.
    • The county source identifies zoning types, site development standards, permitting requirements, and allowed land uses for the unincorporated area.
    • Incorporated municipalities are not established by the cited source as being governed by the county zoning ordinance; their local zoning rules require separate municipal-source verification.
    “We apply Zoning Code standards which help regulate land use and maintain orderly growth within the City.”
  • Zoning districtsPublished (with conditions)

    Property-specific zoning districts and zoning boundaries administered by Nevada County in unincorporated areas.

    • The County publishes Zoning District Maps as a series of maps.
    • The maps provide zoning boundary and code detail and identify County Ordinances affecting the zoning shown on each map.
    • A zoning-designations list, map-book index, and map-book legend are also published.
    • The County states that its Zoning District Maps show property-specific zoning and are divided into several areas of the County.
    “The Zoning District Maps (ZDM) are a series of maps that provide zoning boundary and code detail as well as a list of County Ordinances that affected the zoning contained on the particular map.”
  • Minimum lot sizeDistrict specific (with conditions)

    Residential Agriculture (RA) and Single-Family (R1) zoning districts in unincorporated Nevada County.

    • The zoning regulations apply within unincorporated Nevada County.
    • Minimum parcel size and road frontage for subdivisions and boundary line adjustments are subject to the table; clustering or Planned Development may allow variation if water, sewage disposal, and public-health protections are adequate.
    • For RA, the table states parcel-size requirements depend on public or private water and sewer availability.

    R1 minimum parcel size with public water and sewer: 10000 square feet (Subject to the applicable zoning and subdivision provisions.) · RA minimum parcel size with public water or sewer: 1.5 acres (Subject to the applicable zoning and subdivision provisions.) · RA minimum parcel size with private water and sewer: 3 acres (Subject to the applicable zoning and subdivision provisions.) · minimum road frontage, RA: 120 feet (Subdivision and boundary-line-adjustment exceptions may apply.) · minimum road frontage, R1: 60 feet (Subdivision and boundary-line-adjustment exceptions may apply.)

    “Minimum Parcel Size: Parcel w/public water & sewer (3) (3) 10,000 s.f. Parcel w/public water or sewer (3) (3) 1.5 acres Parcel w/private water & sewer (3) (3) 3 acres”
  • SetbacksDistrict specific (with conditions)

    Residential Agriculture (RA) and Single-Family (R1) zoning districts in unincorporated Nevada County.

    • Front and exterior-side setbacks vary depending on whether the road right-of-way is at least 50 feet wide.
    • For arterial and collector roads, the front-yard setback is 20 feet and the exterior-side-yard setback is 15 feet from the existing or ultimate right-of-way, whichever is greater.
    • Setbacks may be reduced on parcels less than three acres subject to the exceptions-to-building-setbacks section.

    RA/R1 front yard from ROW at least 50 feet wide: 20 feet · RA/R1 front yard from ROW less than 50 feet wide: 45 feet from ROW centerline · RA exterior yard from ROW at least 50 feet wide: 15 feet (RA value; R1 value is 10 feet.) · R1 exterior yard from ROW at least 50 feet wide: 10 feet (RA value is 15 feet.) · RA exterior yard from ROW less than 50 feet wide: 40 feet from ROW centerline (R1 value is 35 feet.) · R1 exterior yard from ROW less than 50 feet wide: 35 feet from ROW centerline (RA value is 40 feet.) · interior yard: 30 feet (Applies to both RA and R1 in the cited table.) · rear yard: 30 feet (Applies to both RA and R1 in the cited table.)

    “Setbacks may be reduced on parcels less than three (3) acres subject to Section governing Exceptions to Building Setbacks.”
  • Lot coverageDistrict specific (with conditions)

    Maximum impervious surface, used here as the county's site-coverage control, in the RA and R1 residential zoning districts in unincorporated Nevada County.

    • The cited code labels the control "Maximum Impervious Surface," not "lot coverage."
    • General Plan Policy 1.23 may impose more restrictive standards.
    • Maximum impervious surfacing may be increased to 60 percent for support uses requiring a use permit, with retention/detention facilities required where applicable.

    RA maximum impervious surface: 30 percent (May be more restrictive under General Plan Policy 1.23.) · R1 maximum impervious surface: 40 percent (May be more restrictive under General Plan Policy 1.23.) · support-use maximum impervious surfacing with use permit: 60 percent (Retention/detention facilities must be incorporated into projects that could result in flood damage to downstream uses.)

    “Maximum Impervious Surface (2) (6) 30% 40% 12.04.190”
  • Building heightDistrict specific (with conditions)

    Residential Agriculture (RA) and Single-Family (R1) zoning districts in unincorporated Nevada County.

    • The cited table applies a maximum height of 35 feet or three stories, whichever is less.
    • The zoning regulations apply within unincorporated Nevada County.

    maximum building height: 35 feet or 3 stories, whichever is less

    “Building Height Limit 35' or 3 stories, whichever is less”
  • Tiny homesAllowed (with conditions)

    Tiny Homes on Wheels used as permanent housing in unincorporated Nevada County.

    • Allowed as single-family dwellings, second dwelling units consistent with allowed density, dwelling groups, or accessory dwelling units.
    • Zoning compliance and building permit issuance are required.
    • A THOW must comply with California Health and Safety Code section 18027.3 and bear the required state-standard label or insignia.
    • THOWs in High or Very High Fire Severity Zones, and THOWs beyond the dead-end-road limit, require a site-specific Fire Protection Plan with emergency-access, water-supply, sprinkler, defensible-space, fuels-management, and evacuation information.
    • The ordinance became operative on February 13, 2025.

    maximum gross floor area: <= 400 square feet, excluding qualifying loft area

    “Yes, THOWs are allowed as single-family dwellings, second dwelling units, or accessory dwelling units, as long as they comply with zoning and building permit regulations.”
  • Well permitRequired

    Construction, modification, and destruction of water wells throughout Nevada County.

    • Well permit applications may be submitted only by a licensed California Well Driller.
    • Applications may be submitted through the county Accela Online Citizen Access Portal.
    • Well permits expire one year after issuance.

    permit validity: 1 year from issuance

    “Nevada County Environmental Health Department regulates the construction, modification, and destruction of water wells throughout the county in order to protect its groundwater resources.”
  • Mandatory utility hookupSewer (with conditions)

    Connection to public sewer systems within Nevada County Sanitation District 1 and other public-sewer availability situations governed by the county OWTS code.

    • Sewer connection permits are required within Nevada County Sanitation District 1.
    • Connection fees and sewer capacity availability vary by zone; capacity depends on property use and is determined by District staff.
    • Where public sewer is available, county OWTS rules require connection and do not issue a septic-system permit.
    • Pump-tank applications are required where a lot requires a step system/pump tank.
    • For ADUs under 750 square feet, impact fees cannot be charged under SB13, but connection charges remain applicable.
    “Sewer Connection Permits are required for connecting to a sewer system within Nevada County Sanitation District 1.”
  • Agricultural exemptionConditional

    Agricultural grading and qualifying nonhabitable accessory agricultural structures on qualifying residential property in unincorporated Nevada County.

    • Agricultural grading exemption requires Building Department verification of a bona fide agricultural project and recommendation by the Agricultural Commissioner.
    • Written verification by the landowner is required and binds the landowner and successors in interest.
    • Exempted lands must be used for agricultural operations for at least five years after the exemption is granted, provided all criteria and procedures are met.
    • Agricultural building exemptions apply to nonhabitable accessory structures on residential property in AG, AE, RA, FR, and TPZ zoning districts.
    • Qualifying structures must meet construction, utility, size, spacing, and setback conditions in the Agricultural Building Exemptions Policy.

    agricultural-use commitment: >= 5 years (Applies after granting of the grading exemption.) · qualifying zoning districts: AG, AE, RA, FR, TPZ (Structures must be accessory to residential property and not intended for habitation.) · pole barn maximum size: <= 1000 square feet (One pole barn per parcel or 20 acres; minimum 100 feet from property line.) · animal husbandry maximum size: <= 400 square feet (One per 5 acres; minimum 40 feet from property line.) · greenhouse maximum size: <= 400 square feet (One structure per parcel or 10 acres.) · pump house maximum size: <= 100 square feet · storage container maximum size: <= 320 square feet (One container per parcel or 5 acres; no utilities or structural modification.)

    “Clearing and grading of land for agricultural operations may be exempted from grading permit requirements by the Building Department upon verification that a bona fide agricultural project is involved and a permit exemption has been recommended by the Agricultural Commissioner.”
  • Subdividing landRegulated (with conditions)

    Subdivision maps and land divisions in unincorporated Nevada County.

    • Final maps must conform to the California Subdivision Map Act and Nevada County Land Use and Development Code Chapters L-IV 2.16 and 2.17.
    • Sewage disposal review is required; proposed parcels generally need a site approval report before map recordation, subject to the cited 40-acre waiver.
    • Minimum usable disposal areas must be shown for subdivisions proposing onsite systems.

    site approval report waiver threshold: >= 40 acres (The Department may waive the report requirement as provided in the Sewage Disposal Regulations.)

    “The form and content of final maps shall be in conformance with the Subdivision Map Act and Chapter L-IV 2.16 & 2.17 Of the Land Use and Development Code.”
  • Building in a floodplainRequired

    Constructing or placing fill within a floodplain, and disturbance within 100 feet of a floodplain, in Nevada County.

    • Constructing or placing fill within a floodplain requires a use permit and environmental review under Title 18 of the Nevada County Code.
    • Disturbance within 100 feet of a floodplain requires a Management Plan under Zoning Regulations section 12.04.210.
    • The use permit requires findings addressing protection of life and health, public flood-control costs, flood rescue, FEMA purposes, recreational access, water quality, and visual character.
    • Use permit filing fees are subject to change and do not include building, sewage disposal, or well permit fees.
    • State Fish and Game fees must be paid before development permits can be obtained; the fee must be submitted within 10 days of permit approval.
    • The use permit approval is valid for three years, subject to the stated extension and completion conditions.

    floodplain disturbance management-plan threshold: <= 100 feet · use permit approval validity: 3 years (An extension may be requested if construction has not commenced.)

    “Constructing or placing fill within a floodplain requires a use permit and is subject to environmental review and the specific requirements of Title 18.”
  • Permit feesPublished (with conditions)

    County-administered building, planning, public works, environmental health, surveyor, and related development fees.

    • The new fee schedule is stated to take effect September 1, 2026.
    • The page lists separate fee schedules for building, building plan review and inspection, environmental health, planning, public works, surveyor, and traffic mitigation fees.
    • Only county-controlled development impact fees may be approved for deferral.
    • Fees not controlled by the County are due at issuance of a Certificate of Occupancy unless deferred by the corresponding agency and proof of deferral is provided.
    • All outstanding and deferred fees must be paid before final inspection.

    fee schedule effective date: 2026-09-01

    “The new fee schedule will take effect on September 1, 2026. Below is the Fiscal Year 2025/2026 fee schedule, along with the new fee schedule for Fiscal Year 2026/2027.”
  • Permit processPublished (with conditions)

    County building permit applications for construction projects, including new dwellings.

    • Applicants may apply at the Permit Processing Center or online through the Citizen Access Portal.
    • Required submittals include three complete sets of construction plans and three site plans.
    • Two sets of truss calculations are required when manufactured trusses are used.
    • Two sets of engineering calculations are required when an engineer was involved.
    • Plan Check Fees must be paid when plans are submitted or the plans will not be accepted.
    • Two sets of septic design with site plan are required if the permit is for a new dwelling.
    • Owner-builder application and packet materials are published separately.

    in-person permit processing hours: Monday-Friday 8:00 a.m.-3:30 p.m. · construction plan sets: 3 sets · site plan sets: 3 sets

    “You must be prepared to pay your Plan Check Fees at the time you bring in your plans. We can not accept your plans unless these fees are paid!”

California rules that apply here

  • Building code adoptedAdopted (with conditions)

    California Building Standards Code, California Code of Regulations, Title 24, including the 2025 California Building Code and related parts, for buildings and structures subject to the state code.

    • The 2025 California Building Standards Code applies to buildings and structures with a permit application date on or after January 1, 2026.
    • The applicable local building department or enforcing agency determines how the permit application date is established in a specific jurisdiction.
    • The code includes multiple parts, including the California Building Code, California Residential Code, Existing Building Code, Electrical Code, Mechanical Code, Plumbing Code, Energy Code, Wildland-Urban Interface Code, Fire Code, and Green Building Standards Code.

    effective date: 2026-01-01 · permit application date: >= 2026-01-01

    “The 2025 California Building Standards Code (CBSC), California Code of Regulations (CCR), title 24, will become effective on January 1, 2026, as a result of the 2024 Triennial Code Adoption Cycle. [...] The 2025 CBSC applies to all buildings and structures with a permit application date on or after January 1, 2026.”
    One more reviewed finding on this topic
    • Adopted — California statewide building standards, including residential construction subject to Title 24 of the California Code of Regulations.
      “Except as otherwise specifically provided by law, the building standards adopted and submitted by the department for approval [...] shall be adopted by reference”
  • 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.”
  • 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”
  • 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.”
    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.”
  • 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.”
  • 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.”
  • 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.”
    One more reviewed finding on this topic
  • 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.”
    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.”
  • 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.”
  • 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.”
  • 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.”
    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”
    • 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”
  • 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:”
  • 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”

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.

Living off-grid in Nevada County, California

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

Nevada County scores 55/100 on the Bolthole Index, a solid county profile. Watch-outs: elevated mid-century heat, water, rain, or wildfire exposure and more administrative friction around building and land use.

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

Nevada County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Nevada County Environmental Health Department (NCDEH). 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 Nevada County?

Living in an RV on your own land in Nevada 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 Nevada County, California?

Land in Nevada County runs about $8,650 per acre, based on the latest county data.

What is the water situation in Nevada County?

Nevada County gets about 51.1" of rain a year, with severe drought in roughly 34.5% of years.

How remote is Nevada County?

A representative private-land location has about 16,455 people within a 30-minute drive and 2,868,132 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.

Off-grid gear

Going off-grid in Nevada County means bringing your own water and power. The kit we’d start with:

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How Nevada compares in California

Compare side-by-side →See all 58 California counties ranked →