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ADU Rules by City

Every city, its own rulebook

ADU zoning is set city by city, not nationally - so we research and score each one individually. Every city on this list allows ADUs today - some make it easy, others require a discretionary permit. We're adding new cities every week.

101 cities covered Last verified: August 2026
Scores and summaries below are compiled from official city code and city planning department sources for general reference - they are not legal advice. Zoning rules change often, and some cities' ADU status is actively in flux. Always confirm current requirements with the applicable city's planning or building department before designing or applying for permits.

Minneapolis

9/10
1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

St. Paul

9/10
800 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Bloomington

8/10
1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Seattle

10/10
1,000 sq ft
Max ADU size
Not required
Owner-occupancy
View rules →

Los Angeles

9/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

San Diego

9/10
1,200 sq ft
Max ADU size
Not required
Owner-occupancy
View rules →

Sacramento

9/10
1,200 sq ft
Max ADU size
Not required
Owner-occupancy
View rules →

Santa Cruz

9/10
1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Berkeley

9/10
1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Fremont

9/10
1,200 sq ft
Max ADU size
Not required
Owner-occupancy
View rules →

Chula Vista

9/10
1,200 sq ft
Max ADU size
Not required
Owner-occupancy
View rules →

Portland

9/10
800 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Denver

9/10
1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

San Jose

8/10
1,200 sq ft
Max ADU size
Not required
Owner-occupancy
View rules →

San Francisco

8/10
1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Oakland

8/10
1,200 sq ft
Max ADU size
Not required
Owner-occupancy
View rules →

Long Beach

8/10
1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Anaheim

8/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Riverside

9/10
1,200 sq ft
Max ADU size
Not required
Owner-occupancy
View rules →

Fontana

9/10
1,200 sq ft*
Max ADU size
Not required*
Owner-occupancy
View rules →

Santa Ana

8/10
1,000 sq ft
Max ADU size
Not required
Owner-occupancy
View rules →

Stockton

8/10
1,200 sq ft
Max ADU size
Not required
Owner-occupancy
View rules →

Fresno

8/10
1,200 sq ft
Max ADU size
Not required
Owner-occupancy
View rules →

San Bernardino

8/10
1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Modesto

8/10
1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Santa Clarita

8/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Rancho Cucamonga

8/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Santa Rosa

8/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Lancaster

8/10
850-1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Escondido

8/10
1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Sunnyvale

8/10
1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Orange

8/10
1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Concord

8/10
1,200 sq ft
Max ADU size
Not required
Owner-occupancy
View rules →

Santa Clara

8/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Tacoma

8/10
1,000 sq ft
Max ADU size
Not required
Owner-occupancy
View rules →

Vancouver

8/10
1,000 sq ft
Max ADU size
Not required
Owner-occupancy
View rules →

Everett

8/10
1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Somerville

9/10
900 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Cambridge

9/10
900 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Worcester

8/10
900 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Bend

8/10
800 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Eugene

8/10
800 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Salem

8/10
900 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Gresham

8/10
900 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Boulder

8/10
800 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Colorado Springs

8/10
1,250 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Tucson

9/10
1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Austin

8/10
1,100 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Durham

8/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Charlottesville

8/10
900 sq ft*
Max ADU size
Required
Owner-occupancy
View rules →

Albuquerque

8/10
750 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Providence

8/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Edina

7/10
1,000 sq ft*
Max ADU size
Not required*
Owner-occupancy
View rules →

Burnsville

6/10
50% of home*
Max ADU size
Required
Owner-occupancy
View rules →

Plymouth

6/10
700 sq ft*
Max ADU size
Required
Owner-occupancy
View rules →

St. Louis Park

6/10
40% of home*
Max ADU size
Likely required*
Owner-occupancy
View rules →

Eagan

5/10
960 sq ft*
Max ADU size
Required
Owner-occupancy
View rules →

Bakersfield

7/10
1,200 sq ft
Max ADU size
Not required
Owner-occupancy
View rules →

Oxnard

7/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Moreno Valley

7/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Glendale

7/10
1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Garden Grove

7/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Irvine

6/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Huntington Beach

6/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Ontario

7/10
1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Elk Grove

7/10
1,200 sq ft
Max ADU size
Not required
Owner-occupancy
View rules →

Corona

7/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Salinas

7/10
Up to 1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Hayward

7/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Torrance

7/10
1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Oceanside

6/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Palmdale

6/10
850-1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Pomona

6/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Pasadena

6/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Fullerton

7/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Carlsbad

7/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Burbank

7/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Spokane

7/10
1,000 sq ft
Max ADU size
Not required
Owner-occupancy
View rules →

Bellevue

7/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Thousand Oaks

6/10
1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Roseville

6/10
1,000 sq ft
Max ADU size
Not required
Owner-occupancy
View rules →

Vallejo

6/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Costa Mesa

6/10
1,200 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Washington, D.C.

6/10
450 sq ft*
Max ADU size
Required*
Owner-occupancy
View rules →

Fort Collins

7/10
1,000 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Boise

7/10
1,000 sq ft*
Max ADU size
Not required*
Owner-occupancy
View rules →

Lakewood

5/10
500-750 sq ft†
Max ADU size
Not required
Owner-occupancy
View rules →

Boston

6/10
900 sq ft*
Max ADU size
Required
Owner-occupancy
View rules →

Newton

6/10
1,000 sq ft*
Max ADU size
Not required*
Owner-occupancy
View rules →

Aurora

4/10
~800 sq ft*
Max ADU size
Not required
Owner-occupancy
View rules →

Phoenix

7/10
1,000 sq ft*
Max ADU size
Not required*
Owner-occupancy
View rules →

Nashville

7/10
850 sq ft*
Max ADU size
Required*
Owner-occupancy
View rules →

Asheville

7/10
1,000 sq ft
Max ADU size
Not required
Owner-occupancy
View rules →

Salt Lake City

7/10
1,000 sq ft*
Max ADU size
Required
Owner-occupancy
View rules →

Santa Fe

7/10
1,500 sq ft*
Max ADU size
Not required*
Owner-occupancy
View rules →

Chicago

6/10
700 sq ft*
Max ADU size
Required*
Owner-occupancy
View rules →

Honolulu

6/10
1,000 sq ft*
Max ADU size
Not required*
Owner-occupancy
View rules →

Richmond

6/10
1/3 of home*
Max ADU size
Not required
Owner-occupancy
View rules →

Blaine

4/10
960 sq ft*
Max ADU size
Required
Owner-occupancy
View rules →

Minnetonka

4/10
1,000 sq ft*
Max ADU size
Required
Owner-occupancy
View rules →

Apple Valley

2/10
Not confirmed*
Max ADU size
Required
Owner-occupancy
View rules →

*Figures are summarized for convenience and may vary by lot and unit type. Scores are ADU Regulations' own editorial rating of how workable each city's ordinance is for a typical homeowner (permit path, owner-occupancy rules, size limits) - not an official city rating.

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