Code of Massachusetts Regulations
225 CMR - DEPARTMENT OF ENERGY RESOURCES
Title 225 CMR 22.00 - Massachusetts Stretch Code and Specialized Code 213 For Low-rise Residential
Chapter 5 - [RE] EXISTING BUILDINGS
Section R502 - ADDITIONS

R502.1 Revise Subsection R502.1 by replacing the third and fourth sentence as follows:

An addition shall be deemed to comply with this code where the addition alone complies, where the existing building and addition comply with this code as a single building, or where the building with the addition achieves a certified HERS rating in accordance with Table R406.5. Additions shall be in accordance with Section R502.1.1, R502.2 or R502.3.

R502.1.1 Add Subsection R502.1.1 as follows:

R502.2 Delete the Exceptions in Subsection R502.2.

R502.3.1 Replace the Exception in Subsection R502.3.1 as follows:

Exception: New envelope assemblies in additions of less than 1,000 sq. ft. are exempt from the requirements of Section R402.4.1.2.

R503.1.5 Level 3 Alterations or Change of Use. Alterations that meet the IEBC definition for Level 3 Alteration or the IRC definition for Extensive Alteration, exceeding 1,000 sq ft or exceeding 100% of the existing conditioned floor area, shall require the dwelling unit to comply with the maximum HERS ratings for alterations, additions or change of use shown in Table R406.5.

R505.1 Delete the Exception in Section R505.1.