Accessory Structures in Alaska (2026)

7 rules on the books across Alaska, 2 cities and counties. Select a rule to read the full details.

Severity: Few Restrictions · Light Restrictions · Some Restrictions · Significant Restrictions · Heavy Restrictions

ADU Rules

Rules for building accessory dwelling units (granny flats, in-law suites) including size limits, parking requirements, and owner-occupancy rules.

Anchorage caps accessory dwelling units at 1,200 square feet and 25 feet in height, allowed by right in every…

Homeowners in the borough's Single-Family Residential Land Use Districts, Canoe Lake Subdivision, Chugach View Estates…

Whether an ADU can be rented short-term (Airbnb), 30-day minimums, separate rental licenses, and long-term lease requirements.

Anchorage's accessory dwelling unit rules explicitly promote rental income and set no owner-occupancy or minimum-lease…

When a storage shed or carport needs a permit, the square-footage exemption thresholds, and the setback and height limits that apply either way.

Anchorage lets a private carport encroach into a required side or rear setback next to an alley, but its combined floor…

A shed, detached garage, barn or other storage building in the borough's Single-Family Residential Land Use Districts…

Zoning rules for tiny houses on wheels and foundations, including minimum square footage requirements and where they can be placed.

Alaska sets no statewide zoning or minimum-size rule for tiny or manufactured homes: that is local. The statewide law…

Anchorage lets a tiny home serve as an accessory dwelling only if it's fixed on a permanent foundation, per the zoning…