Anza, CA Building Setbacks & Zoning: Lot Coverage Limits (2026)

Lot coverage in unincorporated Riverside County restricts the total ground area occupied by buildings to prevent overbuilding and preserve open space and drainage capacity. Under Ordinance No. 348, R-1 (One-Family Dwellings) zones generally limit total structure coverage to 35% of net lot area. R-2 (Multiple Family) allows up to 40%, R-3 (General Residential) permits up to 50%, and R-R (Rural Residential) caps coverage at 20-25% to maintain rural character. Coverage is computed from the outer footprint of all enclosed or roofed structures, including main dwellings, attached/detached garages, covered patios, guest houses, and sheds. Uncovered pools, decks under 30 inches, driveways, and walkways typically do not count. In Hillside Development areas (Ord. 348.4728), coverage is further limited on slopes over 15%. Floor-Area Ratio (FAR) may apply in addition to coverage in specific specific plans. Exceeding coverage requires a variance or minor plot plan adjustment depending on magnitude. Agricultural zones have separate coverage rules emphasizing agricultural use over structures.