Brentwood, CA Building Setbacks & Zoning: Structure Height Limits (2026)

Height limits step down as lots get smaller and multifamily density rises. RE zone lots allow two stories and 35 feet for both main and accessory buildings (§ 17.110.004(G)). The R-1-E zone drops to two stories and 30 feet for the main building, while accessory buildings there are capped at one story and 15 feet, though barns serving large-livestock subdivisions can reach 35 feet with a conditional use permit (§ 17.120.004(G)). The R-1 zone and its R-1-6 through R-1-12 subzones cap main buildings at two stories and 30 feet with no separate accessory-building figure listed (§ 17.130.004(I)).

In the R-2 zone, apartments and attached single-family buildings are limited to two stories and 30 feet for the main building and one story and 15 feet for accessory buildings (§ 17.140.006(C)), while the higher-density R-3 zone allows three stories and 36 feet (§ 17.150.004(I)). Accessory dwelling units follow their own separate schedule under § 17.715.050(E): 16 feet for a standard detached ADU, up to 20 feet near major transit, and 25 feet or the underlying zone's limit (whichever is lower) for an ADU attached to the primary home, capped at two stories. Every housing unit still needs design and site development review under §§ 17.100.003 and 17.100.004 regardless of which zone's height table applies.