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

Retaining walls up to 4 feet in height (measured from bottom of footing to top of wall) without surcharge typically do not require a building permit in Antioch. Walls taller than 4 feet, or supporting a surcharge (driveway, pool, slope), require engineered plans and a permit.

California Health & Safety Code §115920-115929 requires pool barriers minimum 60 inches (5 feet) high with self-closing, self-latching gates. Pools built or remodeled after 2007 must have at least 2 approved safety features. Antioch enforces through building permit inspections.

Antioch does not generally require building permits for standard residential fences under 6 feet. Fences over the height limit or retaining wall combinations may require permits.

California law allows property owners to build fences without neighbor consent. California Civil Code Section 841 allows neighbors to be held equally responsible for maintaining a shared boundary fence.

Antioch allows fences up to 6 feet in rear and side yards, and up to 3.5-4 feet in front yards. Corner lot visibility triangles require lower heights at intersections. Fences over 6 feet require a building permit and potentially a variance.

Antioch requires all swimming pools to have a safety barrier at least 60 inches high per California Building Code. Gates must be self-closing and self-latching. California has stricter pool barrier requirements than the national standard.

Swimming pool construction in Antioch requires a building permit. California law mandates multiple safety features including barriers, drain covers, and at least one additional safety device such as an alarm or cover.

Above-ground pools in Antioch must meet California pool safety requirements. Pools with walls at least 60 inches above grade may serve as the barrier if the ladder is removable.

California state law (AB 68, SB 13, AB 881, and subsequent legislation) broadly permits ADUs in all single-family zones. Antioch must comply with state ADU law, allowing both attached and detached ADUs with streamlined permits.

Garage conversions in Antioch may be facilitated by California ADU law, which allows converting existing garages into ADUs or junior ADUs without replacing the parking spaces.

Carports in Antioch are governed by the Zoning Code as accessory structures. Detached carports must sit behind the front yard setback, must be at least 5 feet from interior side and rear lot lines (20 feet from a side street on a corner lot), and may not exceed 15 feet in height. The garage or carport opening serving a residence must be at least 20 feet from the exterior property line so a parked car will not overhang the sidewalk.

Antioch regulates tiny homes through its ADU ordinance at Antioch Municipal Code 9-5.3805, which expressly recognizes manufactured homes (Cal. Health & Safety Code 18007) and efficiency units (Cal. Health & Safety Code 17958.1) as Accessory Dwelling Units. A detached tiny-home ADU is permitted up to 1,200 square feet at 16 feet in height with 4-foot side and rear setbacks. Tiny homes on wheels (THOWs), park-model RVs, and recreational vehicles are not recognized as ADUs and may not be used as permanent dwellings outside a permitted park.

Sheds in Antioch must comply with setback and size requirements. Sheds under 120 square feet and single story may be exempt from building permits but must meet zoning placement rules.

Open burning is prohibited in Antioch under Bay Area Air Quality Management District (BAAQMD) regulations. Burning of yard waste, trash, and debris is not allowed. Recreational fires in approved containers may be permitted.

Fire pits in Antioch must be contained in approved devices with proper clearance from structures. Wood-burning fire pits are prohibited on Spare the Air days. Gas fire pits are generally more permissible.

Antioch Municipal Code Chapter 9-5.3813 requires a permit to remove any protected tree, including heritage oaks 10+ inches DBH, street trees, and trees on undeveloped parcels. Removal without a permit is a misdemeanor with fines up to $1,000 per tree plus replacement requirements at 3:1 ratio.

Antioch's water is supplied by the City of Antioch Water Department from the Contra Costa Canal (CCWD wholesale) and local sources. State Water Resources Control Board permanent restrictions apply year-round: no runoff, no hosing hardscape, no watering within 48 hours of rain. Odd/even outdoor watering schedules may be activated during drought.

Property owners in Antioch must maintain trees on their property, ensuring clearance over sidewalks and streets. Dead or hazardous trees must be addressed to prevent safety hazards.