Aurora, CO Building Setbacks & Zoning: Setback Rules (2026)

Arapahoe County Land Development Code §3-2 establishes minimum setbacks by zoning district. Unincorporated residential: R-A (Residential Agricultural) requires 50 ft front, 25 ft side, 50 ft rear on typical 2.5-acre lots. R-1 requires 25 ft front, 7 ft side, 25 ft rear. R-2 requires 20 ft front, 5 ft side, 20 ft rear. Corner lots add 15 ft along the street side. Aurora Unified Development Ordinance (UDO) §146-4 mirrors similar standards: R-1 zones 25 ft front, 7.5 ft side, 20 ft rear. Centennial Land Development Code §12-2 varies by subdistrict but averages 20-25 ft front, 5-10 ft side, 20 ft rear. Cherry Hills Village Municipal Code §16-7 requires substantial setbacks of 50-100 ft front and 30-50 ft side, reflecting estate-lot character. Littleton, Englewood, and Greenwood Village have their own standards. Accessory structures (sheds, detached garages) often permitted at 3-5 ft rear setback if under 120 sq ft and under 10 ft tall. Eaves, chimneys, and decks may encroach per specific code exceptions. Variances require Board of Adjustment hearing.