6 county-level rules, plus city-specific rules for 4 cities in San Joaquin County, California.
Verified from official government sources
San Joaquin County Development Title 9, Chapter 9-1022 (Fencing and Screening) governs fence heights in unincorporated areas. Open fences up to 7 feet are permitted in required front yards if they use open materials and don't obstruct sightlines. Security fencing may add 2 more feet.
San Joaquin County requires a building permit for fences over 7 feet in height, masonry walls, and retaining walls in unincorporated areas. Standard fences within height limits generally do not require a building permit. Contact Building Inspection at (209) 468-3121.
California Civil Code §841 (Good Neighbor Fence Act) governs shared boundary fence costs in unincorporated San Joaquin County. The county does not enforce boundary fence disputes. Written notice is required 30 days before construction.
San Joaquin County requires a building permit for any retaining wall over 4 feet in exposed height measured from the bottom of the footing, or any wall of any height supporting a surcharge (driveway, structure, or slope). Walls over 4 feet must be designed by a California-licensed civil or structural engineer. Delta-adjacent properties face additional geotechnical review due to soft soils.
All new residential pools and spas in San Joaquin County must meet the California Swimming Pool Safety Act (Health & Safety Code §115920-115929), which requires a 60-inch barrier plus at least two additional drowning prevention safety features selected from a seven-option list (self-latching doors with alarms, removable mesh fence, ASTM F1346 safety cover, etc.). Stricter than most states — effective January 1, 2018.
CA Health and Safety Code §§115921-115922 (Swimming Pool Safety Act)
115921. As used in this article, the following terms have the following meanings: (a) "Swimming pool" or "pool" means any structure intended for swimming or recreational bathing that contains water over 18 inches deep. "Swimming pool" includes in-ground and aboveground structures and includes, but is not limited to, hot tubs, spas, portable spas, and nonportable wading pools. (c) "Enclosure" me...
San Joaquin County Development Title §9-1020 regulates fence materials by zoning district. Wood, vinyl, masonry, and tubular steel are allowed in residential zones; barbed wire and electric fences are permitted in agricultural (AG/AU/AG-80) zones under Civil Code §841 setback rules but prohibited in residential districts. Razor wire is banned in all residential and most commercial zones.
4 cities in San Joaquin County have their own fence regulations rules. Each link goes to that city's dedicated page with code citations.
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