Effective Dates of Previous Editions of Codes - Building Codes Administration

2000, IBC & IRC: effective 10/15/2001

2003, IBC & IRC, effective 09/20/2004

2006, IBC & IRC, effective 07/01/2007

2009, IBC & IRC, effective 01/01/2010

2012, IBC & IRC, effective 01/01/2012

2015, IBC & IRC, effective 01/01/2015

2018, IBC & IRC, effective 03/25/2019

2021, IBC & IRC, effective 05/29/2023

For additional information, contact:
Department of Labor
Division of Labor and Industry
Building Codes Administration
10946 Golden West Drive, Suite 160
Hunt Valley, MD 21031
410-767-2227
e-mail: dldlibuildingcodes-labor@maryland.gov