Watertown Mandates Rooftop Solar and LEED Certification for New Large-Scale Developments
The town of Watertown has implemented new requirements for large-scale developments, mandating the installation of rooftop solar panels and LEED certification. Specifically, new projects exceeding 10,000 gross square feet or containing 10 or more units within designated districts (NB, LB, WSQ, NMU, I-1, I-2, I-3, RMUD, and PSCD) must now install solar energy systems covering at least 50% of their roof area. Additionally, these developments are required to achieve LEED certification, with a minimum of Silver certification generally, and Gold certification for projects located in the WSQ and NMU districts. These regulations aim to promote sustainable building practices and increase renewable energy adoption within the community. The requirements were confirmed against Town of Watertown sources in November 2026, though it is noted that zoning regulations can change, advising developers to verify with the town before design.