780 CMR Massachusetts State Building Code, 10th edition, based on 2021 IBC/IRC/IEBC/IMC/IECC/ISPSC with extensive Massachusetts amendments, effective Oct 11, 2024. Enforced by Local inspector of buildings/building commissioner in each city and town (MGL c.143 s.3); State Building Inspector for Commonwealth-owned buildings (780 CMR 104.1); BBRS promulgates. Verified on the primary source, re-checked weekly.
Concurrency with the 9th edition ended Jun 30, 2025, leaving the 10th as the only code. Base energy code is 2021 IECC (780 CMR Ch. 13/11R); DOER opt-in Stretch and Specialized codes (225 CMR 22/23) apply where adopted.
Source: primary document
Statewide layer. County and city amendments sit on top; the building view resolves them from your ZIP.
In force; BBRS has begun 11th-edition work (Sep 8, 2026 agenda: guidance for 11th-edition subcommittees), no draft or date; DOER Stretch/Specialized update comment period closed Jun 24, 2026, no effective date posted
780 CMR Massachusetts State Building Code, 10th edition, based on 2021 IBC/IRC/IEBC/IMC/IECC/ISPSC with extensive Massachusetts amendments, effective Oct 11, 2024. Concurrency with the 9th edition ended Jun 30, 2025, leaving the 10th as the only code. Base energy code is 2021 IECC (780 CMR Ch. 13/11R); DOER opt-in Stretch and Specialized codes (225 CMR 22/23) apply where adopted.
Local inspector of buildings/building commissioner in each city and town (MGL c.143 s.3); State Building Inspector for Commonwealth-owned buildings (780 CMR 104.1); BBRS promulgates.
Nothing is scheduled. The rule above stays in force until the state adopts a newer edition or amends the program; AHJ Radar re-checks the source weekly.
One address, every authority that can cite it, and a record of who saw what. Cancel anytime. Public pages stay free.