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Building Permits & Zoning by State
Building permits are issued locally, by the city or county, but each state sets the code baseline. 9 states are home rule, with no single statewide residential energy code. Pick a state for its permitting steps, inspection sequence and when filings are quietest.
Alabama
2015 IECC with amendments
Filings peak in March
Alaska
Home rule
Filings peak in May
Arizona
Home rule
Filings peak in March
Arkansas
2009 IECC with amendments
Filings peak in March
California
2025 Building Efficiency Standards
Filings peak in June
Colorado
Home rule
Filings peak in March
Connecticut
2021 IECC with amendments
Filings peak in April
Delaware
2024 IECC
Filings peak in March
District of Columbia
2015 IECC with amendments
Filings peak in November
Florida
2021 IECC with amendments
Filings peak in June
Georgia
2015 IECC with amendments
Filings peak in March
Hawaii
2018 IECC with amendments
Filings peak in March
Idaho
2018 IECC with amendments
Filings peak in May
Illinois
2024 IECC with amendments
Filings peak in June
Indiana
2018 IECC with amendments
Filings peak in April
Iowa
2012 IECC with amendments
Filings peak in April
Kansas
Home rule
Filings peak in April
Kentucky
2009 IECC
Filings peak in March
Louisiana
2021 IECC with amendments
Filings peak in April
Maine
2021 IECC with amendments
Filings peak in May
Maryland
2021 IECC with amendments
Filings peak in March
Massachusetts
2021 IECC with amendments
Filings peak in June
Michigan
2015 IECC with amendments
Filings peak in June
Minnesota
2012 IECC with amendments
Filings peak in May
Mississippi
Home rule
Filings peak in March
Missouri
Home rule
Filings peak in April
Montana
2021 IECC with amendments
Filings peak in May
Nebraska
2018 IECC
Filings peak in April
Nevada
2024 IECC with amendments
Filings peak in March
New Hampshire
2018 IECC
Filings peak in May
New Jersey
2021 IECC
Filings peak in March
New Mexico
2021 IECC with amendments
Filings peak in June
New York
2024 IECC with amendments
Filings peak in May
North Carolina
2015 IECC with amendments
Filings peak in March
North Dakota
Home rule
Filings peak in May
Ohio
2018 IECC with amendments
Filings peak in April
Oklahoma
2018 IECC with amendments
Filings peak in March
Oregon
2023 Oregon Residential Specialty Code
Filings peak in March
Pennsylvania
2021 IECC with amendments
Filings peak in June
Rhode Island
2024 IECC
Filings peak in May
South Carolina
2009 IECC
Filings peak in May
South Dakota
Home rule
Filings peak in April
Tennessee
2018 IECC with amendments
Filings peak in March
Texas
2015 IECC
Filings peak in April
Utah
2021 IECC with amendments
Filings peak in March
Vermont
2018 IECC with amendments
Filings peak in April
Virginia
2021 IECC with amendments
Filings peak in March
Washington
2021 Washington State Energy Code
Filings peak in March
West Virginia
2015 IECC with amendments
Filings peak in May
Wisconsin
2009 IECC with amendments
Filings peak in May
Wyoming
Home rule
Filings peak in May
Energy codes: U.S. Department of Energy, Building Energy Codes Program. Filing seasonality: Census Building Permits Survey.