Building Codes Atlas

IBC, IRC, NEC, IFC, and IECC adoption across 51 states and 161 cities.

Overview

IBC, IRC, NEC, IFC, and IECC adoption across 51 states and 161 cities. Which edition is your jurisdiction on?

States + DC
51
Cities tracked
161
Local amendments
9
Statewide states
41

Code adoption by edition

IBC ›International Building Code
EditionStatesCities
201226
201536
2018931
20212486
202301
2024831
IRC ›International Residential Code
EditionStatesCities
20121
20153
201811
202121
20245
NEC ›National Electrical Code (NFPA 70)
EditionStatesCities
20082
20141
20172
202017
202325
IFC ›International Fire Code
EditionStatesCities
20061
20121
20155
20185
202119
20248
20251
IECC ›International Energy Conservation Code
EditionStatesCities
20061
20093
20101
20122
20153
20171
20187
202118
20248
20251

Governance models

How each state regulates code adoption. Statewide mandatory states set a single edition; home-rule states let cities adopt independently.

41
Statewide mandatory
AK, AL, 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
8
Home rule
AZ, CO, IL, KS, MO, MS, TN, TX
2
Other
DC, HI

Local amendments

9 cities with documented local code amendments or overrides.

CityStateNote
Los AngelesCASignificant local amendments to CBC, CRC, CMC, CPC
San FranciscoCASignificant local amendments; does NOT adopt the CRC
OlatheKS
New OrleansLA
BaltimoreMD
North Las VegasNV
YonkersNY
MemphisTN
SeattleWA