Codes Enforced

Codes in effect as of March 9, 2011

Residential Projects:

  • Building, Electrical, Mechanical, and Plumbing Codes can be found in the "2009 Michigan Residential Code".  Washtenaw County also enforces Appendix F - Radon Control Methods.


Commercial Projects:

  • Building - Commercial/2009 Michigan Building Code 
  • Building - Residential/2009 Michigan Residential Code (effective March 9, 2011)
  • Electrical - Commercial/2011 Michigan Electrical Code (2011 NEC w/ State Part 8) (Effective July 1, 2013) 
  • Electrical - Residential/2009 Michigan Residential Code (effective March 9, 2011) 
  • Mechanical - Commercial/2009 Michigan Mechanical Code                                                                                                               
  • Mechanical - Residential/2009 Michigan Residential Code (effective March 9, 2011) 
  • Plumbing - Commercial/2012 Michigan Plumbing Code (effective September 27, 2012)  Code                                                                                                                          

  • Plumbing - Residential/2009 Michigan Residential Code (effective March 9, 2011)

Note:  All commercial projects must comply with barrier-free requirements set forth in ICC/ANSI 117.1 1998


Code books are available from:

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