How Cambridge Handles Solar Energy: A Practical Guide

Cambridge maintains 96 local ordinances across all categories, and 2 of those deal specifically with solar energy. Here is a breakdown of what the city actually requires, what is prohibited, and where Cambridge falls on the strict-to-permissive spectrum compared to other cities.

HOA Restrictions

Under MGL c.40A s.3, Massachusetts protects solar access by prohibiting zoning or private restrictions that unreasonably prevent solar installation, though reasonable condo and HOA aesthetic rules are allowed.

Key details: State law: MGL c.40A s.3. Zoning ban: Preempted. Condos: Reasonable rules allowed. Historic districts: Separate review. Unreasonable bans: Challengeable.

Cambridge is more permissive than most cities when it comes to hoa restrictions. That said, there are still limits.

Panel Permits

Cambridge treats solar arrays as a permitted accessory system under a standard building permit, but zoning protection only kicks in once the system is added to the city's public solar registry a year after the permit issues, per Zoning Ordinance Section 22.60.

Key details: First step: Standard building permit required. Registry eligibility: 1 year after permit issuance. Height rule for registration: No more than 5 ft below district max height. Registry kept by: Inspectional Services Department. Protection scope: Considered on neighbor's special permit/variance.

Solar installations follow the Zoning Ordinance's general enforcement scheme. Under Section 9.12, the Superintendent of Buildings will not issue a permit for construction, including a solar installation, that violates the Ordinance, and Section 9.16 sets fines up to $300 per offense (criminal) or $300 per violation (noncriminal, under G.L. c. 40 § 21D), with each day of continued violation counted separately.

If you are coming from a city with tighter rules, you will find Cambridge gives residents more flexibility on panel permits.

The Bottom Line

Compared to many U.S. cities, Cambridge gives residents more room on solar energy. 2 of the 2 rules here are rated permissive. But permissive does not mean unregulated. There are still requirements, and the city does enforce them when violations are reported.

These rules come from Cambridge's publicly available municipal code. For complete penalty schedules, exemption details, and answers to common questions, see the individual ordinance pages throughout this guide.