Bolthole Index

Glenn County, California

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

48Index Score / 100
#16 of 58 in California

Unincorporated Glenn County, California requires a building permit before construction, and county zoning also applies to rural parcels12. Glenn County Environmental Health handles onsite wastewater systems, while new and replacement septic systems require permits under California's statewide framework34. RV residence and tiny homes are not shortcuts around land-use and building approval56.

At a glance

Building permit
Required before construction in unincorporated Glenn County1
Zoning
Yes; county zoning applies in unincorporated areas2
Septic
Glenn County Environmental Health administers the local OWTS program37
RV living
Not a permanent dwelling unless a local ordinance provides another lawful path5
Tiny home
Must qualify and be approved under a recognized building or housing classification6
Owner-builder
Available conditionally, but the owner-builder form is required before permit issuance8
Water well
A permit is required before construction, modification or destruction9

Who to call

Septic permits

Glenn County Environmental Health — Onsite Wastewater Treatment Systems Program

Review of test data and design proposals, complaint investigation, and construction and installation inspections for new and repair onsite wastewater treatment systems

Contact details are copied from each office’s official page and were checked against it on September 27, 2026.

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

Yes. Unincorporated Glenn County requires a building permit, and the county's Building Inspector division screens and approves permit applications before construction1. California's current building standards apply to buildings and structures whose permit applications are dated on or after January 1, 202610. The statewide rule also requires a separate permit before a building or structure is constructed, enlarged, altered, repaired, moved, improved, removed, converted or demolished11. The county materials do not establish a simple exemption list for sheds, agricultural buildings or minor rural work, so ask the Glenn County Building Inspector about the exact project before ordering materials. A qualifying owner-builder may perform or directly contract work under California's licensing exemption, but that exemption does not waive the building permit12.

Who issues building permits in Glenn County, and how do you reach them?

The Glenn County Building Inspector division issues building permits and enforces the California Building Standards Code1. County planning staff administer zoning for unincorporated Glenn County and review development proposals against permitting requirements and performance standards2. Before filing, ask the Building Inspector and Planning & Community Development Services Agency to identify the applications needed for the parcel and project. The county's verified materials do not provide a checker-readable contact page for the Building Inspector, so use the Building Department page linked from Glenn County's official website rather than relying on a third-party directory. Owner-builders must complete, sign and return the county acknowledgment before a permit can be issued, and an agent cannot execute that notice without prior approval from the permitting authority8. Owner-builder projects must still pass applicable codes and building inspections13.

Does Glenn County have zoning?

Yes. Glenn County administers zoning under Title 15 in unincorporated areas, while the incorporated cities of Willows and Orland administer their own land-use rules214. That boundary matters: a Willows or Orland address does not automatically mean county zoning controls the parcel14. Allowed uses, setbacks, lot coverage, height and minimum lot size depend on the responsible jurisdiction and the parcel's zoning district; California reserves ordinary setback rules to local jurisdictions rather than imposing one statewide number15. We could not confirm one countywide minimum dwelling size, setback, height or lot-size rule for every unincorporated parcel, so ask county Planning for a parcel-specific zoning check before selecting a house plan. California permits a local ordinance to allow an efficiency unit with at least 150 square feet, but the available record does not confirm that Glenn County adopted that option16.

How do septic permits work in Glenn County?

Glenn County Environmental Health operates the local Onsite Wastewater Treatment Systems program, reviews test data and designs, and inspects system construction and installation317. Every new or replacement septic system requires a permit through the responsible local jurisdiction or water board under California's OWTS framework4. Only about 3% of Glenn County soils avoid a severe USDA limitation for a conventional drain field, so make septic feasibility a purchase contingency and complete site testing before fixing the building location18. California's lower-risk statewide tier covers qualifying systems up to 3,500 gallons per day, while an approved local management program can cover qualifying systems up to 10,000 gallons per day19. Those thresholds do not guarantee approval of a particular parcel or design19. We could not confirm Glenn County's parcel-specific inspection schedule or whether public sewer connection is required at a particular site, so ask Environmental Health before committing to an off-grid sanitation plan.

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

An RV is not intended to be a permanent dwelling in California, and unless a local ordinance allows otherwise, RV occupancy generally belongs in a mobilehome park or special occupancy park5. We could not confirm a Glenn County ordinance that broadly allows residential RV occupancy or private-land camping, so ask county Planning about the parcel and intended duration before moving an RV onsite. A tiny home may be occupied only when it complies with and is approved as a recognized type, such as a code-built home, manufactured home, factory-built home, recreational vehicle, park trailer or camping cabin6. The location must also be approved for that classification, and a noncomplying tiny home cannot be legally occupied20. A manufactured home can be occupied inside or outside a mobilehome park when its installation and occupancy approvals meet the applicable state framework, with local approvals still potentially required21.

Building a home in Glenn County: what are the steps?

  1. Confirm whether the parcel is in unincorporated Glenn County, Willows or Orland, because the zoning authority changes with location14.
  2. Ask the responsible planning office to verify the proposed dwelling use, zoning district, setbacks and other parcel standards215.
  3. Have Glenn County Environmental Health evaluate septic feasibility and process the OWTS permit when the property will use onsite wastewater34.
  4. Obtain the local permit before constructing, modifying or destroying a water well, and use a licensed well-drilling contractor9.
  5. Submit the building plans and permit application to the Glenn County Building Inspector before construction1.
  6. File the owner-builder acknowledgment if using that pathway, and remember that owner-builder work remains subject to code and inspection813.
  7. Obtain a county encroachment permit for driveway work in a county-road right-of-way, or a Caltrans encroachment permit for access within a state-highway right-of-way2223.

What should you check before buying land in Glenn County?

Start with jurisdiction and zoning: unincorporated Glenn County, Willows and Orland have different land-use authorities14. Verify legal road access because driveway work within a county-road right-of-way requires a county encroachment permit, while a state-highway connection requires Caltrans approval2223. Treat septic suitability as a major contingency because only about 3% of county soils avoid severe limits for a conventional drain field18. Confirm the well permit path and water availability before purchase, since Glenn County permits well construction, modification and destruction and severe drought occurs in about 39% of years924. Ask Public Works or the county's floodplain administrator to review the parcel because we could not confirm the applicable development rule from the available county materials. For carrying costs, Glenn County's effective property-tax rate is about 0.6%, and the median annual property-tax bill is about $2,1902526.

Watch-outs

  • An owner-builder exemption changes contractor-licensing responsibility; it does not remove Glenn County's building permit or inspection requirements1213.
  • An RV is not a permanent dwelling under the cited California guidance, and we could not confirm a broader Glenn County private-land occupancy exception5.
  • Only about 3% of Glenn County soils avoid severe limitations for a conventional septic drain field, so a parcel-specific evaluation can materially change the site plan and budget18.
  • County-road and state-highway driveways use different encroachment-permit authorities2223.

Sources

  1. Glenn County Building Inspector (2026 county census)
  2. Zone Change 2014-002, Square Footage Permitting Thresholds, quoted and re-checked
  3. Glenn County Onsite Wastewater Treatment Systems Program (2026 county census)
  4. 2023 OWTS Policy (California statewide rule), quoted and re-checked
  5. Information Bulletin 2016-01: Tiny Homes, quoted and re-checked
  6. Information Bulletin 2016-01: Tiny Homes, quoted and re-checked
  7. Onsite Wastewater Treatment Systems Policy Implementation Program, quoted and re-checked
  8. Owner Builder Notice and Acknowledgment Form, quoted and re-checked
  9. Wells, quoted and re-checked
  10. Approved Building Standards (California statewide rule), quoted and re-checked
  11. Do I need a building permit for my project? (California statewide rule), quoted and re-checked
  12. California Business and Professions Code Section 7044 (California statewide rule), quoted and re-checked
  13. Owner-Builder Responsibilities (California statewide rule), quoted and re-checked
  14. Zone Change 2014-002, Square Footage Permitting Thresholds, quoted and re-checked
  15. California Health and Safety Code Section 17922 (California statewide rule), quoted and re-checked
  16. California Health and Safety Code Section 17958.1 (California statewide rule), quoted and re-checked
  17. Glenn County Environmental Health — Onsite Wastewater Treatment Systems Program (countyofglenn.net)
  18. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
  19. Onsite Wastewater Treatment Systems Policy Implementation Program, quoted and re-checked
  20. Information Bulletin 2016-01: Tiny Homes (California statewide rule), quoted and re-checked
  21. Information Bulletin 2016-01: Tiny Homes (California statewide rule), quoted and re-checked
  22. Glenn County Public Works Encroachment Permit General Conditions, quoted and re-checked
  23. Encroachment Permits | Caltrans (California statewide rule), quoted and re-checked
  24. Share of years in severe drought: Bolthole Index county data
  25. Effective property tax rate: Bolthole Index county data
  26. Median property tax bill: Bolthole Index county data

Written September 27, 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

Glenn County in California

48
County map
Glenn County highlighted among the California counties · colored by Index score

How Glenn County scores

Seclusion55100% ev.
Self-Sufficiency56100% ev.
Admin Boringness41100% ev.
Durability21100% ev.
Property Autonomy56100% ev.
Carry Cost58100% 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 →

$370kTypical home
0.6%Property tax
$10,262Land / acre
27.4"Annual rain
39.1% of yrsSevere drought
32.4 / yr (+18.3)Mid-century 100°F days
83.9 daysMid-century dry spell
1.76" (+5.1%)Mid-century 1-day rain
1.09×Wildfire change factor
100%Forward climate coverage
$1,083Home insurance / yr
5.1% / yrInsurance growth
1.07%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
12,925Radius comparison (15 mi)
21.4People / sq mi
28.6%Federal land
58.8%Land at 15% slope or less
3.4%Septic soil without severe limits
23,820 acWorkable land screen
33.2%Wooded land
61.7 tonsBiomass / forest ac
60.4°FAvg temp

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Answers from the rulebook for Glenn County

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

Glenn County rules

  • Owner-builder exemptionConditional

    Owner-builder construction permits administered by the Glenn County Building Inspection Division

    • Glenn County recognizes owner-builder permit arrangements including owner-as-worker, owner-as-contractor, and owner-as-employer.
    • The property owner must complete, sign, and return the county owner-builder acknowledgment before the county will issue the building permit.
    • An agent may not execute the owner-builder notice unless the property owner obtains prior approval from the permitting authority.
    • If the owner employs or engages persons other than California licensed contractors and the construction value is at least $500 including labor and materials, the owner may be considered an employer and must comply with applicable payroll, workers’ compensation, and unemployment requirements.
    • For single-family residential structures intended to be offered for sale, the owner-builder must use licensed subcontractors and build no more than four structures in a calendar year, or perform all work under contract with a licensed general building contractor.
    • The owner-builder is legally and financially responsible for the proposed construction activity and must verify contractor licensing and workers’ compensation coverage.
    • The form states an effective date of January 1, 2009 for the referenced owner-builder notice requirements.

    construction value threshold for possible employer status: >= 500 USD (Includes labor and materials.) · single-family structures offered for sale: <= 4 structures per calendar year (Alternatively, all work may be performed under contract with a licensed general building contractor.)

    “Before a building permit can be issued, this form must be completed and signed by the property owner and returned to the agency responsible for issuing the permit.”
  • County-wide zoningPresent (with conditions)

    Zoning under Glenn County Code Title 15 in unincorporated Glenn County.

    • The County Planning & Public Works Agency administers the county zoning code and reviews development proposals for compliance with permitting requirements and performance standards.
    • The cited source does not establish that Glenn County administers zoning inside incorporated municipalities.
    “Project Location: The unincorporated areas of Glenn County [...] Zone Change 2024-002 (ZC2024-002) Housing Element Zoning Updates amending Glenn County Code”
  • Local zoningVaries (with conditions)

    Aggregate local zoning across Glenn County, including county-regulated unincorporated areas and incorporated cities.

    • Glenn County has a county zoning code administered through its county planning authority.
    • The City of Willows separately administers its city zoning code and zoning requirements.
    • The City of Orland separately has primary responsibility for zoning and land-use permits and provides guidance on city zoning district regulations.
    • The applicable zoning authority depends on whether the property is in unincorporated Glenn County, Willows, or Orland.
    “Planning staff administer the City’s zoning code and provide information about allowable uses, development standards, and zoning requirements.”
  • Well permitRequired

    Water well construction, modification, or destruction in Glenn County.

    • A permit must be obtained from the local environmental health agency or local water district before construction, modification, or destruction.
    • Water well construction must be performed by a licensed C-57 Well Drilling Contractor.
    • Applicable local and state well standards must be met.
    • Glenn County Environmental Health Department is listed by California DWR as the Glenn County permitting agency.
    • Wells may be inspected during and after construction, modification, or destruction.
    • Well drillers must submit well completion reports to DWR within 60 days.

    well completion report deadline: <= 60 days

    “Well owners need to obtain permits from local environmental health agencies or local water districts before construction, modification, or destruction takes place.”
  • Driveway accessRequired

    Driveway work within a Glenn County road right-of-way.

    • The encroachment permit form specifically lists driveway work, including permanent and temporary driveways, as proposed work in the right-of-way.
    • All work under the permit must be inspected; the applicant must call Public Works 48 hours before starting work.
    • The permittee must notify the County within five days after completion and obtain final approval and acceptance from Public Works.
    • The permittee is responsible for obtaining all required permits, approvals, and easements.

    inspection notice: 48 hours before start of work · completion notice: 5 days after completion

    “I, WE, the undersigned, hereby apply to the County of Glenn for an Encroachment Permit to do the following work within the County Right of Way in accordance with county ordinances and general laws. TYPE OF WORK PROPOSED TO BE DONE IN RIGHT OF WAY _____ Driveway (_____ Permanent _____ Temporary or _____ Natural Gas)”

California rules that apply here

  • Building permitRequired

    Construction projects within the California Department of Health Care Access and Information Office of Statewide Hospital Planning and Development jurisdiction, including health-facility projects requiring HCAI review.

    • Written plan approval must be issued before the building-permit application proceeds.
    • The application must provide contractor information, Inspector of Record information, and a Testing Inspection and Observation program.
    • The TIO program must be field-approved before approval and subsequent issuance of the building permit.
    • This claim does not establish the permit rule for projects outside HCAI jurisdiction.
    “Once a project receives written plan approval, a Building Permit application is submitted through the e-Services Portal.”
  • 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”
  • 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”
    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.”
  • Certificate of occupancyRequired

    Completed construction projects within HCAI jurisdiction involving California health facilities.

    • The HCAI Compliance Officer issues the project-completion Substantial Compliance or Certificate of Occupancy once required conditions are met.
    • The stated examples include delivery of all test reports to the Inspector of Record, clearance of outstanding items, and completion of the Testing, Inspection and Observation Program.
    • Once construction is completed, the certificate of occupancy allows the owner to apply to the Department of Health Services for a license to operate the health facility.
    “Issues the certificate of occupancy and/or construction final.”
  • 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.”
  • 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.”
  • SetbacksSpecified

    Qualifying SB 9 housing developments in single-family residential zones, including development of up to two primary residential units, subject to the cited statutory eligibility requirements and local ministerial review.

    • The parcel must be located in a single-family residential zone.
    • The project must involve no more than two residential units.
    • Objective standards may be applied only if they do not physically preclude the statutory housing objectives, subject to the stated exceptions.
    • No setback may be required for an existing structure or a structure constructed in the same location and to the same dimensions as an existing structure.
    • For SB 9 projects, side and rear setbacks may not exceed four feet; a local agency may apply a lesser setback, such as 0–4 feet.
    • The local agency cannot apply existing side and rear setbacks applicable in the single-family residential zones.
    • The four-foot side and rear setback standards are not subject to modification.
    • The fact sheet cites Government Code Sections 65852.21(b)(2)(B) and 66411.7(c)(3).

    maximum side setback: <= 4 feet (A local agency may choose to apply a lesser setback, including 0–4 feet.) · maximum rear setback: <= 4 feet (A local agency may choose to apply a lesser setback, including 0–4 feet.)

    “SB 9 establishes an across-the-board maximum four-foot side and rear setbacks.”
    One more reviewed finding on this topic
    • District specific (with conditions) — Building setbacks, side and rear yard requirements, and property line requirements under California's State Housing Law framework.
      “building setback, side and rear yard requirements, and property line requirements are hereby specifically and entirely reserved to the local jurisdictions”
  • Living in an RVLimited

    Occupancy of recreational vehicles in California, including Glenn County, subject to applicable local ordinances and park requirements.

    • 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 governed by the Mobilehome Parks Act or Special Occupancy Parks Act.
    • HCD or a local enforcement agency with assumed enforcement authority must ensure residential structures on applicable park lots comply with statutory construction and maintenance requirements.

    internal living room area: < 320 square feet (Excludes built-in equipment and bath or toilet rooms.) · gross area: <= 400 square feet (Measured at maximum horizontal projections.)

    “RVs are not intended for occupancy as a permanent dwelling.”
    One more reviewed finding on this topic
    • Temporary only (with conditions) — Occupancy of recreational vehicles as residential units in California.
      “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.”
  • 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).”
    One more reviewed finding on this topic
  • 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.”
    2 more reviewed findings 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.”
    2 more reviewed findings on this topic
    • Limited — New and replacement onsite wastewater treatment systems under the California OWTS framework, including systems in Glenn County.
      “Annual reports are due 1 February and should summarize; [...] permits for new and replacement OWTS.”
    • 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.”
  • Mandatory utility hookupSewer (with conditions)

    Certain existing OWTS in California Tier 3 impaired-water-body areas that commit to connect to a centralized wastewater collection and treatment system regulated through waste discharge requirements.

    • The OWTS must have been constructed and operating, or permitted, on or before the date the nearby water body was added to OWTS Policy Attachment 2.
    • The owner must commit by legally binding document to connect to a centralized wastewater collection and treatment system regulated through waste discharge requirements.
    • The owner must sign the legally binding document within 48 months after the nearby water body's initial listing on Attachment 2.
    • The specified connection date may not extend beyond nine years after the date the nearby water body is added to Attachment 2.
    • The rule is an exception to Section 10 requirements for qualifying existing or permitted systems; it is not a general statewide requirement that every property connect to public sewer.

    deadline to sign connection commitment: 48 months (Measured from the date the nearby water body is initially listed on Attachment 2.) · maximum time to complete connection: <= 9 years (Measured from the date the nearby water body is added to Attachment 2.)

    “The owner must sign the document within forty-eight months of the date that the nearby water body is initially listed on Attachment 2. The specified date for the connection to the centralized community wastewater collection and treatment system shall not extend beyond nine years following the date that the nearby water body is added to Attachment 2.”
  • Subdividing landRegulated (with conditions)

    Division of land in California that falls within the statutory definition of subdivision, including division for sale, lease, or financing.

    • A parcel map is generally required unless a final or parcel map is otherwise required or the preparation is waived by local ordinance.
    • Local ordinances may require a tentative map and may establish additional area, improvement, design, drainage, road, sanitary-disposal, water-supply, environmental-protection, and related requirements.
    • Certain railroad-right-of-way and governmental or public-utility conveyances are excepted from the parcel-map requirement described in Government Code section 66428(a).
    “A parcel map shall be required for subdivisions as to which a final or parcel map is not otherwise required by this chapter, unless the preparation of the parcel map is waived by local ordinance as provided in this section.”
  • Permit processPublished (with conditions)

    Construction, alteration, repair, movement, improvement, removal, conversion, or demolition of a building or structure in California.

    • A separate permit for each building or structure must be obtained from the building official before the work.
    • Code requirements vary by city and county; the applicable local building department must be consulted.
    “no building or structure may be erected, constructed, enlarged, altered, repaired, moved, improved, removed, converted or demolished unless a separate permit [...] has first been obtained”
  • 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”

Still unanswered

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

  • Minimum lot size — Minimum lot-size requirements in Glenn County.
  • Lot coverage — Lot-coverage requirements in Glenn County.
  • Building height — Building-height requirements in Glenn County.
  • Off-grid sanitation — Off-grid sanitation arrangements in Glenn County.
  • Agricultural exemption — Agricultural exemptions from applicable county building, zoning, or development requirements in Glenn County.
2 more unanswered
  • Building in a floodplain
  • Short-term rentals

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 Glenn County

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

Actively managed

This basin is under active state management — new water use is scrutinized, though a domestic well is usually still allowed.

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 ↗
  • Sacramento Valley high-priority subbasinspartial of county

    High-priority SGMA subbasins (Corning, Colusa, Vina, Antelope-Tehama, South Yuba, North & South American, Solano, Yolo) with adopted GSPs; a new well is subject to GSA/EO N-7-22 consistency review.

    California DWR — SGMA Basin Prioritization ↗

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 Glenn County, California

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

Glenn County scores 48/100 on the Bolthole Index, a solid county profile. Its strengths: higher long-term carry cost. 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 Glenn County, California?

Glenn County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Glenn County Environmental Health, Onsite Wastewater Treatment Systems Program. 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 Glenn County?

Living in an RV on your own land in Glenn County is limited to specific cases: Statewide rule. Occupancy of recreational vehicles in California, including Glenn County, subject to applicable local ordinances and park requirements. 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 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 Glenn County, California?

Land in Glenn County runs about $10,262 per acre, based on the latest county data.

What is the water situation in Glenn County?

Glenn County gets about 27.4" of rain a year, with severe drought in roughly 39.1% of years. On water rights, Glenn County lies in the Sacramento Valley high-priority subbasins — High-priority SGMA subbasins (Corning, Colusa, Vina, Antelope-Tehama, South Yuba, North & South American, Solano, Yolo) with adopted GSPs; a new well is subject to GSA/EO N-7-22 consistency review..

How remote is Glenn County?

A typical private-land location has about 12,925 people within 15 miles and 3,961,400 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

Off-grid gear

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

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How Glenn compares in California

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