Sierra County, CA Building Setbacks & Zoning: Setback Rules (2026)

In unincorporated Sierra County, required building setbacks are defined district-by-district in the zoning code (SCC Chapter 15.12) rather than in one universal table, so the numbers depend on the parcel's zone. In the R1 residential one-family district (SCC 15.12.080), the minimum yards are a 20-foot front yard, a 5-foot side yard (15 feet on the street side of a corner lot), and a 25-foot rear yard. In the RR-1 rural residential district (SCC 15.12.190), setbacks are larger: the front yard is 60 feet measured from the centerline of any front-abutting road or 35 feet from the front property line, whichever is greater; the side yard is 15 feet; the rear yard is 30 feet; and corner lots maintain 30-foot setbacks on all property lines. The RR 2.5 district (SCC 15.12.205) requires a 30-foot front yard, 15-foot side yard, 30-foot rear yard, and 30 feet on all sides for corner lots. Commercial districts such as CC (SCC 15.12.130) require no yards except where abutting a residential zone. Additional setbacks apply near water: SCC 15.12.060 establishes structural setbacks from lakes, streams, ponds, wetlands, and springs. Because setbacks vary so much by zone, owners should confirm their parcel's zoning and the exact yard requirements with the Sierra County Planning Department in Downieville before designing a structure.