Massachusetts town requires PV installations at all new commercial buildings

Facebook
Twitter
LinkedIn
Reddit
Email
Watertown stands as the first town in New England to require PV atop new commercial buildings. Image: Dale Cruse

A suburb outside of Boston, Massachusetts, has signed off on a new town mandate that requires all new commercial construction projects with an area larger than 10,000 square feet and all new residential buildings with ten or more housing units to feature PV energy.

In addition, renovations of existing buildings over 10,000 square feet must also add PV systems.

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

The new mandate was approved unanimously by Watertown’s town council. Located less than 10 miles west of downtown Boston, Watertown stands as the first town in New England to require PV atop new commercial buildings.

As part of this mandate, a PV system equivalent to 50% of the roof area of the building, along with as 90% of uncovered areas of garages, must be developed at these sites in Watertown. The only sites exempt are projects developed in areas where there is no solar-ready zone, or the solar-ready zone is shaded for more than 50% of daylight hours annually.

Watertown may not be the only New England town to approve such a mandate, as the Massachusetts city of Cambridge, the fifth-most populated city in the state at 105,162 residents, is also considering a similar PV requirement for new construction.

Read Next

Premium
September 24, 2026
Henner Jahnke of Jurchen Technology examines whether high-density east-west systems can outperform trackers under today’s solar economics.
Premium
September 24, 2026
US Policy Focus: PV Tech looks at the Indian AD/CVD determinations, the ban on certain power equipment and other recent developments.
September 23, 2026
The US has published new limits on polysilicon imports to the US ahead of new tariffs coming into force on 4 December.
September 23, 2026
The US clean energy sector has gone from creating 100,000 new jobs a year to shedding nearly 40,000 in 2025, according to a report by E2.
September 23, 2026
Recycling solution firm Comstock Metals and its parent company, Comstock, have started operations at its solar panel recycling facility in Silver Springs, Nevada.
September 23, 2026
The median price for solar PV modules imported to the US has increased by more than 40% since the imposition of tariffs set under Section 232.

Upcoming Events

Solar Media Events
October 13, 2026
San Francisco Bay Area, USA
Solar Media Events
November 3, 2026
Málaga, Spain
Solar Media Events
November 24, 2026
Warsaw, Poland
Solar Media Events
February 2, 2027
London, UK
Solar Media Events
April 20, 2027
Istanbul, Türkiye