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

Setbacks in unincorporated Placer County are established per zone district in the Zoning Ordinance, with measurement and exception rules in Sections 17.54.130 (Setbacks and yards) and 17.54.140 (Exceptions to front, street-side, side, and rear setbacks). For the Residential Single-Family (RS) and Residential Multifamily (RM) zones (Sections 17.50.010 and 17.48.010), the standards are: front 20 feet minimum; street-side 10 feet minimum; side 15 feet total with a 5-foot minimum for one story (7.5 feet minimum for two or more stories); and rear 10 feet minimum for one story (20 feet for two or more stories). For Residential Agricultural (RA) and Residential Forest (RF) zones (Sections 17.44.010 and 17.46.010), the standards are larger: front 50 feet minimum and street-side, side, and rear 30 feet minimum. Combining districts modify these; for example, the Building Site (-B) combining district can require 20-foot setbacks on all sides, as reflected in county variance reports. The front setback is measured at right angles from the front property line or edge of easement, whichever is greater (Section 17.54.130.C.1). Additional setbacks apply from watercourses, certain roads, and in the Tahoe Basin and Truckee-area zoning maps. Reductions require a variance under Section 17.60.100. Because setbacks depend on the exact zone, combining districts, and lot configuration, confirm the applicable setbacks with Placer County CDRA Planning.