US Zoning & Building Codes Guide
Plain-English zoning rules, ADU regulations, and permit requirements for 1,269 US cities — with 221 editor-verified guides and links to official sources.
Or jump to browse by state · compare cities · read a guide
Common starting points
Cities with full editorial coverage
221 cities have been editor-verified with detailed zoning districts, ADU rules, permit costs, and source citations.
New York City
New York
Population 8,336,817
Los Angeles
California
Population 3,898,747
Chicago
Illinois
Population 2,664,452
Houston
Texas
Population 2,301,572
Phoenix
Arizona
Population 1,608,139
Philadelphia
Pennsylvania
Population 1,603,797
San Antonio
Texas
Population 1,434,625
San Diego
California
Population 1,386,932
Dallas
Texas
Population 1,304,379
San Jose
California
Population 1,013,240
Austin
Texas
Population 961,855
Jacksonville
Florida
Population 949,611
Browse by state
Sorted by editorial coverage. States with verified cities are shown first.
Texas
28 verified30 cities · 28 verified
No mandatory statewide building code; local adopt…
Florida
20 verified20 cities · 20 verified
Florida Building Code 8th Edition (2023, based on…
California
19 verified20 cities · 19 verified
2022 California Building Code (based on 2021 IBC)
North Carolina
9 verified21 cities · 9 verified
NC State Building Code (based on 2018 IBC)
Colorado
9 verified20 cities · 9 verified
No mandatory statewide code (local jurisdictions…
Virginia
8 verified24 cities · 8 verified
Virginia Uniform Statewide Building Code (based o…
Arizona
8 verified20 cities · 8 verified
No mandatory statewide building code (local adopt…
Washington
7 verified22 cities · 7 verified
WA State Building Code (based on 2021 IBC)
Ohio
6 verified23 cities · 6 verified
Ohio Building Code (based on 2017 IBC)
Tennessee
6 verified23 cities · 6 verified
TN State Fire Marshal enforces code in some areas…
Michigan
6 verified20 cities · 6 verified
Michigan Building Code (based on 2021 IBC)
Nevada
5 verified27 cities · 5 verified
Nevada adopts IBC through State Public Works
New York
5 verified25 cities · 5 verified
NY State Uniform Fire Prevention and Building Cod…
Missouri
5 verified24 cities · 5 verified
No mandatory statewide building code; local adopt…
New Jersey
5 verified22 cities · 5 verified
NJ Uniform Construction Code (based on 2021 IBC)
Massachusetts
5 verified21 cities · 5 verified
MA State Building Code 10th Edition (based on 202…
Connecticut
5 verified20 cities · 5 verified
2018 CT State Building Code (based on IBC)
Kansas
5 verified20 cities · 5 verified
No mandatory statewide code; local adoption
Oregon
4 verified23 cities · 4 verified
Oregon Structural Specialty Code (based on 2021 I…
Utah
4 verified22 cities · 4 verified
Utah State Construction Code (based on 2021 IBC)
Georgia
4 verified21 cities · 4 verified
2012 Georgia State Amendments to IBC
Alabama
4 verified20 cities · 4 verified
2021 IBC (adopted as base code)
Oklahoma
4 verified20 cities · 4 verified
No mandatory statewide code for residential; loca…
Pennsylvania
3 verified30 cities · 3 verified
PA Uniform Construction Code (based on 2018 IBC)
South Carolina
3 verified23 cities · 3 verified
SC Building Codes Council adopts IBC (2018 editio…
Minnesota
3 verified21 cities · 3 verified
MN State Building Code (based on 2018 IBC)
Idaho
2 verified86 cities · 2 verified
No mandatory statewide building code; local adopt…
New Mexico
2 verified62 cities · 2 verified
NM Building Code (based on 2018 IBC)
New Hampshire
2 verified25 cities · 2 verified
NH State Building Code (based on 2018 IBC)
Nebraska
2 verified22 cities · 2 verified
Nebraska State Building Code (based on 2018 IBC)
Wisconsin
2 verified21 cities · 2 verified
WI Uniform Dwelling Code (unique state code)
Kentucky
2 verified20 cities · 2 verified
Kentucky Building Code (based on 2018 IBC)
Delaware
1 verified43 cities · 1 verified
Delaware State Fire Prevention Code (references I…
Wyoming
1 verified43 cities · 1 verified
No mandatory statewide building code; local adopt…
Vermont
1 verified30 cities · 1 verified
Vermont Fire and Building Safety Code (references…
Alaska
1 verified28 cities · 1 verified
State adopts IBC; many rural areas exempt
Iowa
1 verified22 cities · 1 verified
Iowa State Building Code (based on 2015 IBC)
Mississippi
1 verified22 cities · 1 verified
No mandatory statewide building code; local adopt…
District of Columbia
1 verified21 cities · 1 verified
DC Construction Codes (based on 2021 IBC)
Indiana
1 verified21 cities · 1 verified
Indiana Building Code (based on 2012 IBC)
Montana
1 verified21 cities · 1 verified
Montana Building Codes Bureau administers code (b…
Arkansas
1 verified20 cities · 1 verified
No mandatory statewide code (local adoption)
Hawaii
1 verified20 cities · 1 verified
2018 IBC with Hawaii amendments
Illinois
1 verified20 cities · 1 verified
No statewide building code for non-state building…
Louisiana
1 verified20 cities · 1 verified
Louisiana State Uniform Construction Code (based…
Maine
1 verified20 cities · 1 verified
Maine Uniform Building and Energy Code (MUBEC, ba…
Maryland
1 verified20 cities · 1 verified
Maryland Building Performance Standards (based on…
North Dakota
1 verified20 cities · 1 verified
No mandatory statewide code; local adoption encou…
Rhode Island
1 verified20 cities · 1 verified
RI State Building Code (based on 2021 IBC)
South Dakota
1 verified20 cities · 1 verified
No mandatory statewide code; local adoption
West Virginia
1 verified20 cities · 1 verified
WV State Fire Code (references IBC)