Code of Massachusetts Regulations
780 CMR - STATE BOARD OF BUILDING REGULATIONS AND STANDARDS
Chapter CHAPTER 51 - MASSACHUSETTS RESIDENTIAL CODE
Chapter 3 - BUILDING PLANNING
Section R301
Subsection 301.1
Subsection 313.2
Current through Register 1543, March 14, 2025
Revise and replace section R313.2 One- and two-family dwellings automatic sprinkler systems as follows:
R313.2 One-and two-family dwellings automatic sprinkler systems. Primarily owner occupied one- and two-family dwellings and accessory spaces newly constructed as short term rental lodging houses and primarily owner occupied one- and two-family dwellings and accessory spaces which began being used as short term rental lodging houses on or after October 17, 2017, shall be equipped with an automatic sprinkler system installed in accordance with NFPA 13D.
Note: Non-primarily owner occupied one and two-family dwellings shall meet the requirements of 780 CMR based on the use classification determined in accordance with 780 CMR Chapter 3.
Revise and replace section 313.2.1 Design and installation as follows:
Exception: An automatic sprinkler system shall not be required where additions or alterations are made to existing one- or two-family dwellings having an aggregate area greater than 14,400 ft2 that are not already provided with an automatic sprinkler system. Aggregate area for the purposes of this exception shall be as described in R313.2 and shall include the addition or alteration area in the calculation.
