Newton, MA Building Safety: Green Building Code (2026)

Sec. A of Chapter 30's Sustainable Development Design article makes green building certification a condition of the special permit for any project that constructs or substantially reconstructs 20,000 square feet or more of gross floor area under Sec. A. A project designed to the LEED Green Building Rating Program must achieve a minimum 'Silver' level, rising to a minimum 'Gold' level for projects over 50,000 square feet of gross floor area; the ordinance does not require the applicant to actually pay for LEED certification, only to design to the standard.

Sec. 5 lists the rating systems the city treats as authorized: LEED, the Passive House Green Building Rating Program, and the Enterprise Green Communities Green Building Rating System, plus embodied-carbon benchmarks under LEED's Whole Building Life-Cycle Assessment credit, the Green Building Initiative's Green Globes credit, or the International Living Future Institute's Zero Carbon Standard, or another method the Planning Director approves. Where a rating program offers more than one system, the applicant must use whichever system the Planning Director finds most directly applicable to the project or building type, using the most current version of that system as of the special permit application, and must specify the chosen system and version in the application itself.

Projects where at least 50% of the floor area reuses a pre-existing structure are exempt from the embodied-carbon analysis requirement under Sec. 3, though they remain subject to the underlying rating-system certification standard.