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

January 19, 2026
US solar firm SunPower has signed a letter of intent to acquire California-based residential and commercial installer Cobalt Power Systems in an all-equity transaction. 
January 19, 2026
Solar PV has met two-thirds (61%) of the US electricity demand growth in 2025, according to a report from think tank Ember.
January 19, 2026
Last week, the Chinese Ministry of Commerce (MoC) issued its final review ruling regarding anti-dumping measures on solar-grade polysilicon originating in the US and South Korea.
January 16, 2026
Global tech giant Amazon has been approved as the buyer of the 1.2GW Sunstone solar project in Oregon, one of the largest solar PV projects in the US.
January 16, 2026
US C&I solar developer Altus Power has acquired four solar projects with a total capacity of 105MW from IPP Cordelio Power. 
January 16, 2026
The Patent Trial and Appeal Board (PTAB) of the US Patent and Trademark Office (USPTO) has partially ruled against solar manufacturer Maxeon in several claims against Canadian Solar.

Upcoming Events

Solar Media Events
February 3, 2026
London, UK
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