Code Questions & Information

Connecticut State Codes Enforced

Updated October 1, 2018

Building Permit applications filed on or after October 1, 2018 are required to meet the following codes:

  • Residential Buildings (One and Two Family Dwellings): 2015 International Residential Code
    • 2018 Connecticut Amendment
    • 2017 National Electrical Code
  • All Buildings Other Than One and Two Family Dwellings:
    • 2015 International Existing Building Code
    • 2015 International Mechanical Code
    • 2015 International Plumbing Code
    • 2015 International Energy Conservation Code
    • 2017 National Electrical Code
    • ICC/ANSI A117.1 - 2009 Accessible and Usable Buildings and Facilities
    • 2018 Connecticut Amendment

Building Permit applications filed on or after October 1, 2016 but before October 1, 2018 are required to meet the following codes:

  • Residential Buildings (One and Two Family Dwellings): 2012 International Residential Code
    • 2014 Connecticut Amendment
    • 2016 National Electrical Code
  • All Buildings Other Than One and Two Family Dwellings:
    • 2012 International Existing Building Code
    • 2012 International Mechanical Code
    • 2012 International Plumbing Code
    • 2012 International Energy Conservation Code
    • 2014 National Electrical Code
    • ICC/ANSI A117.1 - 2009 Accessible and Usable Buildings and Facilities
    • 2016 Connecticut Amendment

Building Permit applications filed on or after February 28, 2014 but before October 1, 2016 are required to meet the following codes:

  • Residential Buildings (One and Two Family Dwellings): 2009 International Residential Code
    • 2013 Connecticut Amendment
    • 2011 National Electrical Code
  • All Buildings Other Than One and Two Family Dwellings:
    • 2003 International Existing Building Code
    • 2003 International Mechanical Code
    • 2003 International Plumbing Code
    • 2009 International Energy Conservation Code
    • 2011 National Electrical Code
    • ICC/ANSI A117.1 - 2003
    • 2005 CT Supplement (Effective December 31, 2005)
    • 2009 CT Amendment (Effective August 1, 2009)

Copies of Code

Copies are available from the International Code Council by calling 800-786-4452. Connecticut specific versions of the International Building Codes and the International Residential Codes are available from the International Code Council. These versions have the CT amendments incorporated into one book.

Construction / Code Questions

Contact Building Inspection Division staff at 203-992-8910 or email your question to [email protected].

View modifications to the Connecticut State Building Code (PDF).