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

Maximum lot coverage in Temecula is established by zone in TMC Title 17. Hillside Residential (HR) and Very Low Density allow 25% maximum coverage to protect open space character. Low Density L-1 and L-2 typically cap coverage at 30-35%. Low Medium Density (LM), the most common Temecula tract zone, allows up to 40% coverage. Medium Density (M) allows up to 50% coverage. Coverage is calculated as the total building footprint (including covered porches, attached garages, and roofed accessory structures) divided by the total lot area, expressed as a percentage. Open patios, swimming pools, driveways, and unenclosed decks under 30 inches typically do not count toward coverage but may count toward separate impervious surface limits in the Hillside zone. Master-planned community Specific Plans (Harveston, Roripaugh Ranch, Wolf Creek, Paloma del Sol, Redhawk) often impose stricter coverage and floor area ratios tied to lot size brackets. Coverage compliance is verified at the time of building permit through a site plan with calculations stamped by a designer. Variances are available through the Planning Commission for exceptional cases.