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.

A standard 6-foot residential fence does not need a planning permit in Antioch. Fences over 6 feet (up to 8 feet) in commercial/industrial districts require a Minor Administrative Use Permit; fences over 6 feet generally also require a building permit under the California Building Code as locally adopted.

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 caps fences in the required front yard at 36 inches, allows up to 6 feet on interior side and rear lines in residential zones, and permits 8 feet only with a Minor Administrative Use Permit (commercial/industrial) or where the top 2 feet are open lattice/wrought iron in residential zones.

A City of Antioch building permit is required before constructing or installing any in-ground or permanently installed above-ground swimming pool, spa, or hot tub, and the project is reviewed under the 2025 California Building, Residential, Electrical, and Plumbing Codes.

Antioch regulates hot tubs and spas under the same Article 20 swimming-pool provisions and California Swimming Pool Safety Act as in-ground pools whenever they hold water over 18 inches deep.

Antioch enforces the California Swimming Pool Safety Act through its adoption of the California Residential Code: any new or remodeled residential pool, spa, or hot tub must be enclosed by a qualifying barrier and provide at least two drowning-prevention safety features.

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.

Antioch implements California state ADU law through Antioch Municipal Code Section 9-5.3805, allowing one ADU plus one JADU on single-family lots with a four-foot side and rear setback, a 16-foot height limit for detached ADUs, and ministerial 60-day approval.

Antioch follows California state law allowing ministerial, by-right conversion of an existing garage into an ADU, with no setback added beyond fire-safety distance, no replacement parking required, and no fire-sprinkler requirement unless the primary dwelling already has sprinklers.

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.

Antioch Municipal Code Section 9-5.603 caps accessory structures in residential districts at 15 feet tall, requires a five-foot rear and interior side setback, and exempts truly portable storage sheds (under 120 sq ft, under 8 ft tall, no foundation) from permit requirements.

Open burning in Antioch is regulated by the Contra Costa County Fire Protection District (CCCFPD), which is the fire authority for Antioch. CCCFPD issues two limited permit types - Recreational/Bonfire and Religious Service - and otherwise prohibits open burning. The Bay Area Air Quality Management District (BAAQMD) Regulation 6, Rule 3 separately bans wood burning on declared Spare the Air winter days.

Antioch follows the California Fire Code (CFC) Section 307, adopted through Antioch Municipal Code Chapter 8-15 and amended by CCCFPD Ordinance 2019-37. Portable outdoor fire pits and outdoor fireplaces are permitted at one- and two-family dwellings if they are constantly attended, located a safe distance from structures, and equipped with on-site extinguishing means.

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 Municipal Code Chapter 6-10 (Drought Management Regulations and Water Conservation) makes a list of nonessential water uses permanently prohibited, including watering between 9:00 a.m. and 5:00 p.m., watering more than three days per week, watering that causes runoff, and washing paved surfaces with potable water. Fines escalate from $100 per day for a first offense to $500 per day for repeat violations.

Antioch Municipal Code § 9-5.1210 requires trees planted on private property to sit at least five feet from the sidewalk and to be trimmed so branches clear the sidewalk by seven feet and the street by fourteen feet. Removing or significantly pruning an established, mature, or landmark tree also requires a Tree Removal Permit issued by Public Works under AMC Article 12.