Massachusetts town requires PV installations at all new commercial buildings

December 11, 2018
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

February 20, 2026
Microsoft met all of its electricity demand with renewables in 2025 and has said it will continue to do so through 2030.  
Premium
February 20, 2026
In the last two weeks, both Shoals and Voltage have declared victory in an eBOS patent infringement case, following a ruling from the US ITC.
February 20, 2026
Origis Energy has commissioned three 145MW Swift Air solar facilities in Ector County, Texas, to supply power to Occidental’s operations in West Texas. 
February 19, 2026
Israel-headquartered inverter producer SolarEdge has reported revenue of US$1.1 billion in 2025, while reducing its net loss from the previous year.
February 19, 2026
German solar wafer manufacturer NexWafe and US-based cell producer Talon PV have signed a wafer supply agreement in the US.
February 19, 2026
Swift Current Energy has secured tax equity financing and US$248 million in project financing for its 122MW Three Rivers Solar facility.

Upcoming Events

Solar Media Events
March 24, 2026
Dallas, Texas
Solar Media Events
April 15, 2026
Milan, Italy
Solar Media Events
June 16, 2026
Napa, USA
Solar Media Events
October 13, 2026
San Francisco Bay Area, USA
Solar Media Events
November 3, 2026
Málaga, Spain