Santa Ana, CA Building Setbacks & Zoning: Setback Rules (2026)

Three consecutive sections of Chapter 41 set the yard setback minimums for Santa Ana's R1 (single-family residence) district. Section 41-234 sets the front yard at whatever the prevailing front yard setback is for that block, as determined under Section 41-603(b), but never less than 20 feet regardless of what neighboring homes do. Section 41-235 governs side yards: each side yard must be at least 5 feet wide for every building, and on a corner lot the side yard facing the street must be at least 10 feet.

That section also gives legally nonconforming homes some relief, if a building's only nonconformity is a side yard narrower than the 5-foot standard, the nonconforming-building restrictions in Article VI don't apply as long as the side yard is still at least 3 feet wide. Section 41-236 sets the rear yard at a minimum of 20 feet, but expressly exempts permitted accessory dwelling units from that rear setback, reflecting the city's accommodation of state ADU law. These three setbacks work together with the R1 building height cap of 27 feet/two stories in Section 41-233 and the 35 percent lot coverage limit in Section 41-238 to define the buildable envelope on every R1 lot in Santa Ana.