Zoning › Building Codes

Building Codes Atlas

IBC, IRC, NEC, IFC, and IECC adoption across 51 states and 151 cities. Which edition is your jurisdiction on?

51States + DC
151Cities Tracked
8Local Amendments
40Statewide States
Code Adoption by Edition
IBC International Building Code
42 states · 151 cities tracked
Edition States Cities
2024 9 states 32 cities
2023 0 states 1 cities
2021 20 states 80 cities
2018 9 states 26 cities
2015 1 states 5 cities
2012 3 states 7 cities
IRC International Residential Code
43 states
Edition States Cities
2024 8 states — cities
2021 22 states — cities
2020 1 states — cities
2018 8 states — cities
2015 1 states — cities
2012 2 states — cities
2009 1 states — cities
NEC National Electrical Code
44 states
Edition States Cities
2023 28 states — cities
2020 12 states — cities
2017 2 states — cities
2008 2 states — cities
IFC International Fire Code
34 states
Edition States Cities
2024 4 states — cities
2021 19 states — cities
2018 7 states — cities
2015 2 states — cities
2012 2 states — cities
IECC International Energy Conservation Code
42 states
Edition States Cities
2025 3 states — cities
2024 5 states — cities
2021 18 states — cities
2020 1 states — cities
2018 6 states — cities
2015 3 states — cities
2012 2 states — cities
2009 3 states — cities
2007 1 states — cities
Governance Models
40
Statewide Mandatory
AK, AR, CA, CT, DE, FL, GA, IA, ID, IN, KY, LA, MA, MD, ME, MI, MN, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, OR, PA, RI, SC, SD, UT, VA, VT, WA, WI, WV, WY
7
Home Rule
AZ, CO, IL, KS, MO, TN, TX
1
Hybrid
AL
3
Other
DC, HI, MS
Local Amendments
8 cities with documented local code amendments or overrides
City State Notes
Los Angeles CA Significant local amendments to CBC, CRC, CMC, CPC
San Francisco CA Significant local amendments; does NOT adopt the CRC
Olathe KS —
New Orleans LA —
Baltimore MD —
Yonkers NY —
Memphis TN —
Seattle WA —