With New ADU Rules, Anchorage Leading U.S. Zoning Reform Efforts

Anchorage recently passed a package of laws that will allow accessory dwelling units in commercial and residential zones, and, in a rare move, on residential lots with existing multi-family housing.

1 minute read

March 22, 2023, 9:00 AM PDT

By James Brasuell @CasualBrasuell


An aerial view of the Anchorage metropolitan area shows sprawling development surrounded by tall mountains.

Karel Stipek / Shutterstock

The Anchorage Assembly recently approved a reform package that will allow more accessory dwelling units (ADUs) in Alaska’s largest city.

According to an article by Jeanette Lee for the Sightline Institute, the city will ease ADU permitting and construction by “allowing bonus homes on more kinds of properties and removing owner-occupancy requirements and onerous design rules.”

Anchorage’s ADU reforms allow a bonus home in all commercial and residential zones and on all kinds of housing, including large, multifamily buildings. Owners can build a bonus home, or buy a home that comes with one, but no longer have to live on the property. Design-based barriers, including square footage, height, and architectural requirements, were eased or eliminated. The ordinance requires the city planning department to help people navigate the permitting process and start tracking the number of ADUs. Anchorage already did away with parking mandates, another design-related impediment to ADUs, in a separate ordinance last year.    

Lee also describes Anchorage’s amended ADU codes as significant compared to other zoning reform efforts around the country. “Most cities limit ADUs to lots with single houses in residential zones,” for example, “But Anchorage now allows them with multifamily homes, too.” 

Anchorage also made zoning reform news in November, when it eliminated  parking requirements citywide.

Friday, March 17, 2023 in Sightline Institute

Young Professional

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban and Environmental Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban and Environmental Planner

Get top-rated, practical training for planners

"Planetizen federal action tracker" logo superimposed over black and white image of US Capitol dome.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

October 28, 2026 - Zachary Whalen

A car drives through a puddle, making a large splash. Rain pours down.

California plans to bury El Niño’s downpour

If the state plays its cards right, it may be able to store a billion acre-feet of El Niño’s water in aquifers.

October 28, 2026 - Grist

A pencil rendering of Foundry Park, which shows skyscrapers and public green spaces.

Chicago breaks ground on $3 billion megadevelopment

The new neighborhood, titled Foundry Park, will one day host 3,700 residences.

October 23, 2026 - Chicago Sun Times

A swamp in South Carolina with tall pale trees and Spanish moss in the water.

Satanic place names

From streams and lakes to valleys and canyons, I mapped more than 1,000 places named after the Devil.

October 31 - The Daily Yonder

A rendering of a high speed rain station in California, with wide platforms and a sleep train with yellow highlights.

California High-Speed Rail Authority CEO resigns after $600,000 scandal

Under Ian Choudri, the authority used taxpayer dollars to fund first class flights and trips to nightclubs.

October 30 - Cal Matters

 A bridge stretches across the Missouri River at Chamberlain, South Dakota.

Want to study the Missouri River? Soon, you may need unanimous approval from 10 states

Legislation would require 10 governors’ permission to study or build projects moving water outside the basin.

October 30 - South Dakota Searchlight