Accessory Structures in Littleton, CO (2026)
3 verified accessory structures rules for Littleton, Colorado, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Littleton passed Ordinance No. 09, Series 2025, allowing ADUs in all residential zones to comply with Colorado HB 24-1152. The ordinance increases maximum ADU size to 1,000 sq ft, eliminates extra parking requirements, and removes design restrictions that don't apply to primary homes. Effective June 2025.
Littleton ADU Regulations
Some RestrictionsShed Rules
Littleton's building code (Title 4) and ULUC (Title 10) regulate accessory structures. Structures under 200 sq ft may be exempt from building permits in some cases, but must still comply with ULUC zoning setbacks and lot coverage. Larger structures require permits.
Littleton Shed & Accessory Structure Rules
Some RestrictionsGarage Conversions
Garage conversions in Littleton require building permits under Title 4 and must comply with ULUC parking requirements. Converting a garage to living space may create a parking deficiency if the property's required off-street parking is reduced below the minimum.
Littleton Garage Conversions
Some RestrictionsLooking for Arapahoe County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Littleton city rules.
Accessory Structures in Arapahoe County →