Anchorage, AK Accessory Structures: ADU Impact Fees (2026)

Alaska Statute Title 29 (Municipal Government) gives the Municipality of Anchorage broad home-rule authority but Alaska has not adopted a statewide development impact fee enabling statute analogous to California's Mitigation Fee Act or Idaho's Development Impact Fee Act. As a result, ADU construction costs in Anchorage are driven by direct permit fees and utility connection charges rather than a separate impact-fee schedule. Typical charges include: (1) Land use permit fees under AMC Regulation 21.20 (schedule of fees adopted by Assembly resolution) — historically administrative ADU processing has been on the order of low hundreds of dollars; (2) Building permit fees under Title 23, calculated on construction valuation per the adopted IBC/IRC fee schedule; (3) Plan review fees, typically 65 percent of the building permit fee; (4) Electrical and mechanical permit fees separately; (5) Anchorage Water and Wastewater Utility (AWWU) connection or capacity charges if a new water/sewer service line is installed — sharing the existing service with the principal dwelling avoids new connection charges; (6) Anchorage Municipal Light & Power (ML&P, now part of Chugach Electric) service charges for new electrical service. Fire Department plan review may apply for ADUs over certain size thresholds. The 2023 ADU reform (AO 2022-107) did not impose new impact fees and intentionally kept the cost framework lean to encourage ADU production amid Anchorage's housing shortage. School impact fees: Alaska does not authorize them; the Anchorage School District is funded through state foundation funding and the Municipality's areawide property tax mill rate.