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 City Code Chapter 7.5 imposes Capital Expansion Fees (CEFs) on new dwelling units for community parks, police, fire, and general government. CEF for a typical detached single-family unit runs approximately $7,000-$10,000 depending on square footage tiers in Section 7.5-32. Under HB24-1152 (effective 6/30/2025), ADUs under 750 sq ft pay no more than 50% of the primary-dwelling impact fee rate. Fort Collins Utilities Plant Investment Fees (water PIF, wastewater PIF, stormwater PIF) under City Code Chapter 26 apply if new utility service is added; ADUs sharing service with the primary dwelling pay reduced or no PIF. Building permit fees scale with valuation per IBC fee schedule. Larimer County Road Impact Fees apply at unincorporated edges. Affordable-restricted ADUs may qualify for Fort Collins Affordable Housing Capital Fund fee waivers.
Failure to pay required impact fees and PIFs blocks issuance of the Certificate of Occupancy under City Code 5-43. Unpaid utility PIFs become liens on the property under City Code 26-87. Misstating ADU square footage to dodge fee tiers is permit fraud under City Code 5-44 with civil penalty up to $1,000 per occurrence plus investigation fees.
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