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.

16 June 2026
Napa, USA
PV Tech has been running PV ModuleTech Conferences since 2017. PV ModuleTech USA, on 16-17 June 2026, will be our fifth PV ModulelTech conference dedicated to the U.S. utility scale solar sector. The event will gather the key stakeholders from solar developers, solar asset owners and investors, PV manufacturing, policy-making and and all interested downstream channels and third-party entities. The goal is simple: to map out the PV module supply channels to the U.S. out to 2028 and beyond.
13 October 2026
San Francisco Bay Area, USA
PV Tech has been running an annual PV CellTech Conference since 2016. PV CellTech USA, on 13-14 October 2026 is our third PV CellTech conference dedicated to the U.S. manufacturing sector. The events in 2023, 2024 and 2025 were a sell out success and 2026 will once again gather the key stakeholders from PV manufacturing, equipment/materials, policy-making and strategy, capital equipment investment and all interested downstream channels and third-party entities. The goal is simple: to map out PV manufacturing in the U.S. out to 2030 and beyond.

Read Next

March 26, 2026
More than 70% of global solar manufacturing facilities exhibited “major” or “critical” defects in 2025, according to a new report from Intertek CEA.
March 25, 2026
EDP Renewables North America, Linea Energy and LRE have all advanced solar projects in the US Midwest this week.
March 25, 2026
Spanish independent power producer (IPP) Zelestra has secured US$600 million in green financing for two solar PV projects totalling 440MW in Texas.
March 25, 2026
Utility-scale solar PV and wind accounted for 17% of the US’ total electricity generation in 2025, according to the EIA.
March 25, 2026
Drawing on multiple field inspections, James Whittmore of Enertis Applus+ discusses some of the common problems emerging in the run-up to the US’s July project safe harbour deadline.
March 24, 2026
Sunraycer has signed long-term power purchase agreements with Google for its Lupinus and Lupinus 2 solar projects in Texas.

Upcoming Events

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
Solar Media Events
November 24, 2026
Warsaw, Poland