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International Residential Code

The 2009 International Residential Code, adopted as 780 CMR 51.00 (Massachusetts Residential Code) within the 8th Edition State Building Code, effective August 2010.

Direct answer and reference scope

International Residential Code is presented here as a reference within the IRC 2009 collection for Massachusetts. The 2009 International Residential Code, adopted as 780 CMR 51.00 (Massachusetts Residential Code) within the 8th Edition State Building Code, effective August 2010. Use the Massachusetts Board of Building Regulations and Standards to confirm the code edition currently adopted for the project, and compare the model text with state amendments, local amendments, effective dates and the permit authority's interpretation. The ICC code library is the model-code publication path. This Harth page is a searchable reference transcription, not an official code publication, legal opinion or confirmation that this edition controls a particular address. Record the project jurisdiction, application date, occupancy, construction type and amendment set before relying on a section. Where this page conflicts with an official publication or the authority having jurisdiction, the official source controls.

Authored and prepared by Harth. Review scope: official verification path added; code text and current local applicability have not been independently reviewed.

The 8th Edition Massachusetts State Building Code adopted the 2009 IRC as 780 CMR 51.00 for one- and two-family dwellings, with Massachusetts amendments, effective August 2010. It covers the design and construction of one- and two-family dwellings and townhouses, covering building planning, structural, mechanical, plumbing, and energy provisions for homes. The full text below is reproduced from the 2009 edition as adopted into law, sourced from public.resource.org.

Where verbatim source text is shown, it is reproduced from the code as adopted into law by the jurisdiction, sourced from public.resource.org under the government edicts doctrine (see Georgia v. Public.Resource.Org, Inc., 590 U.S. 255 (2020)). This material reflects enacted law and is provided for reference and educational purposes only. It is not legal advice and may not reflect local amendments or the most recently adopted edition. Always verify requirements with the authority having jurisdiction.