Antioch, CA Swimming Pools & Spas: Pool Permits (2026)

The Antioch Building Services Division administers building permits at 200 H Street, 2nd floor City Hall, and confirms that 'Effective January 1, 2026, the City will enforce the California 2025 Building Codes.' Under California Residential Code section R105 (as adopted by the city), permits are required for the construction, enlargement, alteration, or installation of any swimming pool, spa, or hot tub at a single-family residence; pools are not on the Building Division's published list of permit-exempt projects (which is limited to items like one-story accessory structures under 120 square feet, retaining walls three feet or less in height, residential concrete flatwork, landscape sprinklers, and certain fence replacements). Applications are submitted through Antioch's Civic Access / Enterprise Permitting & Licensing online portal, and typically must include a site plan showing property lines, building footprints, the proposed pool location and dimensions, setback distances to the water's edge, fence and gate details meeting California Health and Safety Code sections 115922 and 115923, locations of pumps and water heaters, and any new gas or electrical runs. Zoning compliance for accessory swimming pools (location and setback) is governed by Antioch Municipal Code Title 9, Article 20 (sections 9-5.2001 et seq., 'Swimming Pools and Hot Tubs'). Inspections must be scheduled with the Building Division during construction; an approved set of city-stamped plans and the issued permit must be on site for each inspection.