Accessory Structures in Fort Collins, CO (2026)
9 verified accessory structures rules for Fort Collins, Colorado, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Fort Collins regulates ADUs through local zoning. Colorado HB 24-1152 requires certain municipalities to allow ADUs. Rules vary by city.
Fort Collins ADU / Accessory Dwelling Rules
Some RestrictionsADU Permits
Fort Collins permits Accessory Dwelling Units in residential zones under the Land Use Code (LUC) Article 4 and Division 3.8.30. Applications go through Community Development and Neighborhood Services (CDNS) as administrative Basic Development Reviews. Colorado HB24-1152 (effective 6/30/2025) further requires by-right ADU approval citywide in single-family zones.
Fort Collins ADU Permit Process
Few RestrictionsADU Impact Fees
Fort Collins charges Capital Expansion Fees (City Code Chapter 7.5) and utility plant investment fees (PIFs) on new ADUs, scaled to dwelling size. Colorado HB24-1152 caps ADU impact fees at 50% of the primary-dwelling rate for units under 750 sq ft in qualifying jurisdictions. Fort Collins Utilities water and wastewater PIFs apply when new service is added.
Fort Collins ADU Impact Fees
Some RestrictionsADU Owner Occupancy
Fort Collins does NOT require owner occupancy for ADUs. The 2024 Land Use Code update removed the owner-occupancy clause from LUC Division 3.8.30 to align with Colorado HB24-1152 (effective 6/30/2025), which prohibits owner-occupancy requirements as a condition of ADU approval in jurisdictions of 1,000+ population.
Fort Collins ADU Owner Occupancy
Few RestrictionsADU Rental Restrictions
Fort Collins permits long-term ADU rental without minimum lease terms but restricts short-term rentals (under 30 days) under City Code Chapter 15, Article XVI. ADUs may operate as STRs only in designated zones and with a Short-Term Rental License from the Sales Tax Department. Primary STRs require owner presence; non-primary STRs are limited to specific zoning districts.
Fort Collins ADU Rental Restrictions
Heavy RestrictionsShed Rules
Fort Collins allows small sheds without permits (typically under 120 to 200 sq ft). Larger structures need building permits. Setback requirements apply.
Fort Collins Shed & Outbuilding Rules
Few RestrictionsGarage Conversions
Fort Collins may allow garage conversions with permits. Colorado has no statewide garage conversion mandate. Replacement parking may be required.
Fort Collins Garage Conversion Rules
Some RestrictionsCarport Rules
Fort Collins requires permits for carport construction. Setback requirements, height limits, and lot coverage maximums apply.
Fort Collins Carport Construction Rules
Some RestrictionsTiny Homes
Fort Collins regulates tiny homes differently based on whether they are on a permanent foundation or on wheels. Zoning and minimum square footage requirements apply.
Fort Collins Tiny Home & Small Dwelling Rules
Some RestrictionsLooking for Larimer County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Fort Collins city rules.
Accessory Structures in Larimer County →