Before You Build in Thousand Oaks, CA: Permit & Rule Checklist (2026)

Maximum 6 feet along side or rear lot lines, minimum 10 feet from front lot line. Front yard fences limited to 3 feet in height. Up to 9 feet allowed along rear line with Community Development Director approval for noise attenuation. TOMC Sec. 9-4.2509.

Retaining walls in Thousand Oaks require a building permit when exceeding 4 feet in height and must comply with the California Building Code and the city's hillside development standards. Walls in slope areas require engineering and geotechnical analysis.

All residential swimming pools and spas in Thousand Oaks must have safety barriers meeting California Building Code requirements. Fences must be at least 60 inches tall with self-closing, self-latching gates. Barriers must prevent unsupervised access by children under five.

Thousand Oaks follows California Civil Code sections 841-845 for shared boundary fence responsibilities. Adjacent property owners share costs for reasonable boundary fence construction and maintenance. The city's development code addresses fence placement relative to property lines.

Standard fences in Thousand Oaks up to 6 feet in side and rear yards typically do not require building permits. Front yard fences are limited to 3 feet in height. Masonry walls, fences in hillside areas, and fences exceeding standard heights require permits.

Hot tubs and spas in Thousand Oaks require building and electrical permits. Safety barriers are required unless a locking safety cover meeting ASTM F1346 is maintained. Setbacks from property lines apply, and electrical work must comply with NEC Article 680.

Above-ground pools in Thousand Oaks with a water depth over 18 inches require a building permit and must meet the same safety barrier requirements as in-ground pools. Small inflatable pools under 18 inches deep are generally exempt from permit requirements.

All in-ground swimming pools and permanent above-ground pools in Thousand Oaks require a building permit from the Community Development Department. Plans must show setbacks, drainage, fencing, and electrical systems. Multiple inspections are required during construction.

All residential swimming pools and spas in Thousand Oaks must be enclosed by a safety barrier at least 60 inches high with self-closing, self-latching gates. Requirements follow California Building Code Section 3109 and the Swimming Pool Safety Act.

Thousand Oaks enforces California's Swimming Pool Safety Act requiring multiple layers of drowning prevention for residential pools. New pools must have at least two safety features from an approved list. Anti-entrapment drain covers meeting federal standards are mandatory.

Thousand Oaks Ordinance 1732-NS (Nov. 22, 2024) governs ADUs. Detached ADUs up to 1,200 sq ft; 4-foot side/rear setbacks; up to 16 ft height for detached. Attached ADUs up to 50% of primary or 1,200 sq ft, up to 25 ft height. JADUs max 500 sq ft. Minimum 30-day rental per state law.

Garage conversions to ADUs are allowed under CA state law and TOMC Ord. 1732-NS. Existing setbacks are exempt for conversions. Replacement parking is not required when a garage is converted to an ADU. Interior garage parking spaces must remain for non-ADU structures.

Tiny homes on permanent foundations are regulated as ADUs under California state law and TOMC Chapter 9. Tiny homes on wheels are classified as recreational vehicles and cannot be used as permanent dwellings in residential zones. Minimum dwelling size requirements apply.

Carports in Thousand Oaks require a building permit and must comply with TOMC Chapter 9 setback and lot coverage requirements. Carports in front yards may be restricted depending on the zoning district. Materials and design must be compatible with the primary structure.

Accessory structures (sheds, garages) in Thousand Oaks are regulated under TOMC Title 9 zoning and building code. Permits required for structures over 120 sq ft. Must meet setback requirements. Cannot exceed primary structure height in residential zones.

Outdoor wood burning is subject to seasonal no-burn days (typically November–February) under South Coast AQMD Check Before You Burn program. Gas/propane fire pits are generally permitted year-round. Household trash burning is prohibited.

Gas and propane fire pits are generally permitted. Wood-burning fire pits are subject to South Coast AQMD no-burn day restrictions (November–February). ANSI certification required for all outdoor fire pits. Prohibited during Spare the Air alerts.

Thousand Oaks enforces water conservation measures through its municipal code and coordination with the Calleguas Municipal Water District. Permanent water waste prohibitions under California law apply, with additional restrictions during drought declarations.

Thousand Oaks has a strong tree protection program regulating trimming and pruning of protected trees. The city's Heritage Tree Ordinance protects oaks, sycamores, and walnuts of qualifying size, requiring permits for significant trimming.

Thousand Oaks has oak tree preservation protections — no ADUs or structures in protected tree zones. Tree removal permits may be required by TOMC Title 9 for protected species. Contact Community Development for permits.