Bolthole Index county-legal census · checked 2026-09-09
40 of California's 58 counties — 69% — let an owner build their own home without a licensed contractor. That is the 14th-largest count of any state. The strongest of them on the Bolthole Index is San Mateo County (61/100). Every entry below cites the county’s own official source.
Rules change, and cities inside these counties set their own — treat this as a verified starting point, not legal advice. All 1516 counties nationwide → California: tiny homes → Full California profile →
40 of 58 California counties · sorted by Index score
California recognizes a statewide owner-builder exemption (B&P Code 7044); an Owner-Builder Declaration is required at permit issuance.
California Contractors State License Board - Owner-Builder Overview ↗Humboldt County offers a distinct 'Alternative-Owner Builder (AOB) Residence' permit pathway separate from standard residential construction; a permit is still required.
Humboldt County - Apply for a Building Permit ↗The county provides an Owner-Builder permit process (owner-builder verification form) and a Title 15 chapter for Limited Density Owner-Built Rural Dwellings.
Calaveras County Code Ch. 15.12 Owner-Built Rural Dwellings ↗The county accepts owner-builder applications within California owner-builder limits with required disclosure and ownership-verification forms.
Tuolumne County CA - Building Division ↗Sierra County provides Owner-Builder Verification and Certification forms (BD-03, BD-04) for new residential construction, allowing owners to permit as owner-builders.
Sierra County - New Residential Construction ↗California allows an owner-builder to pull their own building permit under B&P Code 7044, and the county building permit process accommodates owner/builder applicants (though no…
Nevada County Permits ↗California allows an owner to build their own residence without a contractor license (B&P Code 7044); Glenn County provides an Owner Builder form/declaration among its permit fo…
Glenn County Building Permit Forms and Applications ↗California's statewide owner-builder exemption (B&P Code 7044) allows a property owner to build/improve their own residence; the county still requires a permit.
SLO County Planning & Building – Permits in Unincorporated SLO ↗California permits an owner-builder to obtain their own building permit under B&P Code 7044, applicable through Permit Sonoma's residential building permit process.
Permit Sonoma - Residential Building Permit (BPC-021) ↗California's statewide owner-builder exemption (B&P Code 7044) lets an owner build/improve their own single-family or duplex residence; Monterey issues owner permits accordingly.
Monterey County HCD – Building & Planning Services FAQs ↗California's statewide owner-builder exemption (Business & Professions Code 7044) lets an owner obtain a permit and build their own residence in Lake County without a licensed c…
Lake County - How to Obtain a Building Permit ↗California recognizes a statewide owner-builder exemption (B&P Code 7044); an Owner-Builder Declaration is required at permit issuance.
California Contractors State License Board - Owner-Builder Overview ↗County Code Chapter 15.10 (Limited Density Owner-Built Rural Dwellings) provides alternative building standards and substitute materials/procedures for owner-built, owner-occupi…
Amador County - Chapter 15.10 Limited Density Owner-Built Rural Dwelling Regulations ↗California permits an owner-builder to obtain their own building permit under B&P Code 7044, applicable through Napa County's building permit process.
Napa County - Building Permit Process ↗California permits an owner-builder to obtain their own building permit under B&P Code 7044, applicable through Yolo County's building permit process.
Yolo County Building Inspection Services - Permits ↗California's statewide owner-builder exemption lets a property owner build/improve their own residence (not for sale, up to two structures in any three-year period) without a co…
California CSLB - Owner-Builder Overview ↗Fresno County allows a property owner to obtain a building permit for their own project, reflecting the California B&P 7044 owner-builder exemption.
County of Fresno - Planning Forms ↗California's statewide owner-builder exemption (Business & Professions Code 7044) lets a property owner build or improve their own residence without a licensed contractor via an…
California CSLB - Owner-Builder Overview ↗California recognizes a statewide owner-builder exemption (B&P Code 7044); an Owner-Builder Declaration is required at permit issuance.
California Contractors State License Board - Owner-Builder Overview ↗California permits owner-builders to obtain permits and perform work on their own property within statewide owner-builder limits.
Sutter County CA - Building Services ↗California's statewide owner-builder exemption (B&P Code 7044) lets a property owner build/improve their own single-family residence; Tulare processes homeowner permits accordin…
Tulare County RMA – Building Department ↗California's statewide owner-builder exemption (B&P Code 7044) allows a property owner to build/improve their own residence; the county still requires a permit.
Marin County CDA – Building Permits (Unincorporated Marin) ↗California recognizes a statewide owner-builder exemption (B&P Code 7044); an Owner-Builder Declaration is required at permit issuance.
California Contractors State License Board - Owner-Builder Overview ↗California's statewide owner-builder exemption (B&P Code 7044) allows a property owner to build/improve their own residence; the county still requires a permit.
Santa Cruz County CDI – Apply for a Building Permit ↗California recognizes a statewide owner-builder exemption (B&P Code 7044); an Owner-Builder Declaration is required at permit issuance.
California Contractors State License Board - Owner-Builder Overview ↗Stanislaus County allows a property owner (as well as a licensed contractor) to obtain a building permit, reflecting the California B&P 7044 owner-builder exemption.
Stanislaus County Planning - Apply for a Building Permit ↗Kern County provides an owner-builder declaration/verification form for permit applicants building on their own property, reflecting the California B&P 7044 owner-builder exempt…
Kern County Planning - Forms & Applications ↗California recognizes a statewide owner-builder exemption (B&P Code 7044); an Owner-Builder Declaration is required at permit issuance.
California Contractors State License Board - Owner-Builder Overview ↗Under California Business & Professions Code 7044 an owner-builder may build a single-family residence for their own use without a contractor license (not intended for sale; lim…
California Business & Professions Code 7044 - Owner-builder exemption ↗The county states that both licensed contractors and property owners (Owner/Builder) may be issued building permits, recognizing the owner-builder path.
Alpine County - A Building Permit ↗Riverside County allows a property owner to obtain a building permit for their own project, reflecting the California B&P 7044 owner-builder exemption.
Riverside County Building & Safety - FAQ ↗California recognizes a statewide owner-builder exemption (B&P Code 7044); an Owner-Builder Declaration is required at permit issuance.
California Contractors State License Board - Owner-Builder Overview ↗Contra Costa County allows a property owner to obtain a building permit for their own project via the permit forms, reflecting the California B&P 7044 owner-builder exemption.
Contra Costa County - Permit List and Forms ↗California allows an owner-builder to build/improve their own residence without a contractor license, subject to statutory limits (e.g., no more than two structures in any three…
California Contractors State License Board - Owner-Builder Overview ↗San Joaquin County allows a property owner to obtain a residential building permit for their own project, reflecting the California B&P 7044 owner-builder exemption.
San Joaquin County - Residential Building Permits ↗California recognizes a statewide owner-builder exemption (B&P Code 7044); an Owner-Builder Declaration is required at permit issuance.
California Contractors State License Board - Owner-Builder Overview ↗California recognizes a statewide owner-builder exemption (B&P Code 7044); an Owner-Builder Declaration is required at permit issuance.
California Contractors State License Board - Owner-Builder Overview ↗Sacramento County provides homeowner/owner-builder guidance and permitting, reflecting the California B&P 7044 owner-builder exemption allowing owners to permit work on their ow…
Sacramento County Building - Homeowner/Contractor ↗California recognizes a statewide owner-builder exemption (B&P Code 7044); an Owner-Builder Declaration is required at permit issuance.
California Contractors State License Board - Owner-Builder Overview ↗Solano County permits a property owner to obtain a building permit for their own project under general permitting requirements, reflecting the California B&P 7044 owner-builder …
Solano County - General Permitting Requirements ↗Every county here has a full profile — water, land prices, hazard safety, seclusion, and the rest of its building rules. See the California state page for all 58 counties ranked, or go back to the national list.
General guidance, not legal advice. Off-grid, building, and land-use rules are often set at the county level and change often. Verify with your county and state before acting. Data reviewed 2026-06-26.
