Fort Collins, CO Accessory Structures: ADU Impact Fees (2026)

5, Article I-II of the Fort Collins Municipal Code) imposes multiple per-unit impact fees on new residential construction, and every fee schedule in the chapter carries a dedicated "Multifamily/ADU" rate column that is lower than the single-family detached and single-family attached tiers. Under Sec. 5-28, the community parkland capital expansion fee for a Multifamily/ADU unit is billed by size: up to 750 square feet costs $1,611, 751 to 1,300 square feet costs $2,249, and anything over 1,301 square feet costs $2,494 (effective January 1, 2026 rates; the 2025 table used a flat residential sliding scale without a separate ADU line).

Sec. 5-28(a) states the fee 'shall be payable prior to the issuance of any building permit for a residential structure' and that in the case of duplexes and multi-family structures the fee is based on the average size of the dwelling units in the structure. Parkland is only one of the capital expansion fees an ADU triggers: the same Multifamily/ADU tiering repeats in the police capital expansion fee (Sec. 5-29, $375 to $567 per unit as of January 1, 2026) and in the other capital expansion fee sections later in the same article (fire, general government, and street oversizing each carry their own Multifamily/ADU line).

Fees collected under Sec. 5-28(b) go into the interest-bearing 'community parkland capital expansion fee account' established at Sec. 8-95 and can only fund community-park capital improvements identified in the capital improvements plan. Sec. 5 fee, including the ADU tier, until certificate-of-occupancy issuance or December 1 of the deferral year, whichever comes first, and locks in the fee rate in effect when the building permit issued even if Council raises the fee during the deferral period.