Code of Massachusetts Regulations 780 CMR - STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
The 780 CMR is the Massachusetts State Building Code, administered by the Board of Building Regulations and Standards (BBRS). The Tenth Edition, effective from October 11, 2024, introduces significant updates to construction standards across the Commonwealth.(halifax-ma.org)
📘 Overview of 780 CMR – Tenth Edition
Effective Date: October 11, 2024
Concurrency Period: A transition period allowing the use of either the Ninth or Tenth Edition for permit applications filed by June 30, 2025. After this date, only the Tenth Edition will be accepted. (halifax-ma.org)
Structure:
Base Volume: Based on the 2021 International Building Code (IBC), with Massachusetts-specific amendments.
Residential Volume: Adopts the 2021 International Residential Code (IRC), tailored for one- and two-family dwellings and townhouses up to three stories.(mass.gov, coderedconsultants.com)
🏗️ Key Features and Updates
International Code Integration: Incorporates the 2021 editions of the following International Codes (I-Codes), with Massachusetts-specific amendments:
International Building Code (IBC)
International Residential Code (IRC)
International Existing Building Code (IEBC)
International Mechanical Code (IMC)
International Energy Conservation Code (IECC)
International Swimming Pool and Spa Code (ISPSC)
Portions of the International Fire Code (IFC) (mass.gov, salemma.gov)
Energy Code: The Tenth Edition serves as the "base" energy code. Municipalities may adopt "Stretch" or "Specialized Stretch" energy codes for higher efficiency standards. (mass.gov)
Flood Zone Regulations: Updated guidelines for the elevation and design of structures in flood-prone areas.
Structural and Safety Enhancements: Revised provisions for seismic design, fire safety, and accessibility.
📚 Accessing the Code
Official Versions: Available for purchase through the State House Bookstore.(sec.state.ma.us)
Draft Amendments: For review of proposed changes, visit the BBRS Draft Amendments Page.(jigsawlifesafety.com)
🛠️ Implementation Timeline
Concurrency Period: October 11, 2024 – June 30, 2025(mass.gov)
Full Enforcement: Starting July 1, 2025, only the Tenth Edition will be applicable for all building permits. (aiama.org)
For comprehensive details and updates, refer to the Massachusetts State Building Code – 780 CMR.(mass.gov)
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