Unincorporated Kings County, California requires a building permit for a home, issued by the Kings County Community Development Agency, which enforces the California Building Standards Code1. The county also zones unincorporated land itself2. Kings County administers onsite wastewater systems through its approved Local Agency Management Program3. California lets an owner-builder build or improve a home they will live in without a contractor's license, within statutory limits4.
At a glance
- Building permit
- Required in unincorporated county, issued by the Community Development Agency1
- Zoning
- Yes, six district types under the county's own Development Code2
- Septic permit
- County-administered under an approved Local Agency Management Program3
- Owner-builder exemption
- Allowed within California's statutory limits4
- Accessory dwelling unit
- Allowed statewide on a qualifying lot; decision required within 60 days5
- RV or tiny home living
- Generally limited to mobilehome/special occupancy parks unless a local ordinance allows otherwise; Kings-specific rule unconfirmed6
- Floodplain permit
- Required for construction in mapped Zone A or Zone AE7
- Permit applications
- Verified online account and PDF plans required8
Who to call
Building permits
Kings County Community Development Agency
Building permits, planning and zoning permits, floodplain development permits, and code enforcement for unincorporated Kings County
1400 W. Lacey Blvd., Bldg. #6, Hanford, CA 93230
Septic permits
Kings County Department of Public Health, Environmental Health Services
Onsite wastewater (septic) system permits and inspections for unincorporated Kings County under the county's Local Agency Management Program
460 Kings County Drive, Hanford, CA 93230
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 Kings County, California?
Yes. Unincorporated Kings County requires a building permit for construction, issued by the Kings County Community Development Agency, which reviews plans and specifications and enforces the California Building Standards Code1. California's 2025 Building Standards Code applies to permit applications dated on or after January 1, 20269. To apply for a Kings County construction permit, register for an Online Permit Center account and wait for the Building Department to verify it, then upload scaled, sufficiently detailed plans and supporting documents as PDF files8. The county may request more information needed to show compliance with Title 248.
Who is the Kings County building department, and how do you reach them?
The Kings County Community Development Agency handles building and planning permits from 1400 W. Lacey Blvd., Bldg. #6, in Hanford, California 9323010. Call the Building Division at (559) 852-2670 or email [email protected]10. Office hours are Monday through Thursday, 8:00 a.m. to 5:00 p.m., and Friday, 8:00 a.m. to noon10. The agency accepts permit applications digitally through its Online Permit Center rather than on paper10. Account verification is required before all online-permit features become available8.
Does Kings County have zoning?
Yes. Kings County zones unincorporated land itself under its own Development Code, with six district types: Agricultural, Residential, Commercial, Mixed Use, Industrial, and Public Facilities2. California law lets a county's legislative body adopt zoning ordinances covering building and structure location, height, size, lot coverage, intensity of use, parking, and setbacks anywhere in county jurisdiction outside an incorporated city, which is the legal basis for Kings County's own Development Code11. An accessory dwelling unit is allowed statewide on a lot zoned for single-family or multifamily use that already has, or will have, a dwelling on it, and the permitting agency must approve or deny a complete application within 60 days5. We could not confirm Kings County's specific setback, minimum-lot-size, or minimum-dwelling-size numbers for each district from an accessible copy of the county's own Development Code text, so confirm those with the Community Development Agency for your parcel before you buy10.
How do septic permits work in Kings County?
Kings County administers onsite wastewater systems locally through an approved Local Agency Management Program, while State Water Board policy and regional-board oversight still apply3. New and replacement systems require local permitting, but the exact Kings County application, exemptions, and fee schedule could not be confirmed; ask Environmental Health Services what your parcel and proposed system require1213. Reach Kings County Environmental Health Services at 460 Kings County Drive, Hanford, California 93230, phone (559) 584-141113. Only 21.2% of Kings County soil is rated not “very limited” for a conventional septic drain field, so obtain a site evaluation before assuming a standard system will work14.
Can you live in an RV or tiny home on your land in Kings County?
California treats RV living, tiny homes, and manufactured homes as three different questions, and Kings County's own answer to each is unconfirmed beyond the state baseline. Statewide, an RV is not meant to be a permanent dwelling, and unless a local ordinance says otherwise, RVs generally may be occupied only in a mobilehome park or a special occupancy park6. We could not confirm whether Kings County has a local ordinance that allows RV or camper occupancy on private, unincorporated land outside a park, so call the Community Development Agency before you plan to live in one on your own land10. A tiny home can be occupied statewide if it qualifies as, and is approved as, a HUD-code manufactured home, a California Residential or Building Code home, factory-built housing, a recreational vehicle, a park trailer, or a camping cabin; a structure that fits none of those categories and doesn't meet the state building code isn't legal to occupy15. Manufactured homes may be occupied inside or outside a mobilehome park statewide under the Mobilehome Parks Act, but Kings County's own siting rules for a specific parcel were not confirmed from an accessible county page16. An accessory dwelling unit, by contrast, is a confirmed option: California requires Kings County to approve one ministerially on a qualifying residential lot, without a discretionary hearing5.
Building a home in Kings County: the steps, in order
- Confirm your parcel's zoning district (Agricultural, Residential, Commercial, Mixed Use, Industrial, or Public Facilities) and any setback or lot-coverage rules by calling the Kings County Community Development Agency before you buy102.
- Register for the Online Permit Center, wait for Building Department verification, and upload scaled plans and supporting documents as PDF files8.
- If your project is in a mapped Zone A or Zone AE special flood hazard area, download and submit the county's Floodplain Development Permit application and elevation certificates before you build7.
- Ask Kings County Environmental Health Services for the site-specific septic application, review, and inspection requirements before installing an onsite wastewater system313.
- If you plan to act as your own contractor, confirm you meet California's owner-builder limits, including living in the home for the 12 months before completion and using the exemption on no more than two structures in any three-year period17.
- Expect your project to be reviewed against the California Building Standards Code in effect on your permit application date; the 2025 code applies to any application dated January 1, 2026 or later9.
- If you add an accessory dwelling unit later, expect the county to decide a complete application within 60 days without a discretionary hearing5.
What to check before you buy land in Kings County
Kings County averages 7.7 inches of precipitation a year and has experienced severe drought in about 40.4% of recent years1819. Typical home value is $367,678, with a median property tax bill of $2,295 a year at an effective rate around 0.8%202122. Population density is about 110 people per square mile, and the nearest city of 100,000 or more is roughly 30 miles from the county center2324. Only 21.2% of county soil is rated not “very limited” for a conventional septic drain field, so confirm septic suitability before closing14. About 88% of the county's land has a slope of 15% or less, while projected days at or above 100°F reach about 57 a year by mid-century2526. Confirm the parcel's zoning and floodplain status with the Community Development Agency and its septic requirements with Environmental Health Services1013.
Watch-outs
- Kings County's Community Development Agency accepts only digital permit applications, and the Building Department must verify your Online Permit Center account before all features are available108.
- If you're converting a previously permitted structure, such as an agricultural building, to a new use, Kings County requires a change-of-use inspection to check whether a new zoning permit or occupancy classification applies27.
Sources
- Kings County - Building Ordinance (2026 county census)
- Kings County - Development Code / Zoning Ordinance (2026 county census)
- Local Agency Management Programs (LAMPS) for On-Site Wastewater Treatment Systems (OWTS), quoted and re-checked
- California Contractors State License Board - Owner-Builder Overview (2026 county census)
- Accessory Dwelling Unit Handbook March 2026, quoted and re-checked
- Information Bulletin 2016-01: Tiny Homes (California statewide rule), quoted and re-checked
- Kings County Web Permitting, quoted and re-checked
- Kings County Web Permitting, quoted and re-checked
- Approved Building Standards (California statewide rule), quoted and re-checked
- Kings County Community Development Agency (countyofkingsca.gov)
- California Government Code Section 65850 (California statewide rule), quoted and re-checked
- Onsite Waste Water Treatment Systems, quoted and re-checked
- Kings County Department of Public Health, Environmental Health Services (kcdph.com)
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Information Bulletin 2016-01: Tiny Homes (California statewide rule), quoted and re-checked
- Information Bulletin 2016-01: Tiny Homes (California statewide rule), quoted and re-checked
- Owner-Builder Overview, quoted and re-checked
- Annual precipitation: Bolthole Index county data
- Share of years in severe drought: Bolthole Index county data
- Typical home value (Zillow): Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Population density: Bolthole Index county data
- Distance to the nearest metro area: Bolthole Index county data
- Share of land at 15% slope or less: Bolthole Index county data
- Projected mid-century days at or above 100°F: Bolthole Index county data
- Kings County Development Code, 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.