Somerville's Relaxed Approach to Solar Energy: What's Allowed

If you live in Somerville or are thinking about moving there, solar energy are one of those things you probably won't think about until they affect you directly. Somerville has 2 specific rules on the books covering different aspects of solar energy, and some of them might surprise you.

Panel Permits

Solar installations in Somerville need ISD building and electrical permits. Most rooftop systems qualify for expedited review and are allowed by right.

Key details: State protection: MGL c.40A s.3 solar access. Permits: Building and electrical from ISD. Expedited: Residential under 10 kW typical. Ground mount: Full zoning review. Historic: HPC approval, rear preferred.

The rules around panel permits in Somerville lean permissive, but that does not mean anything goes.

HOA Restrictions

State law, not Somerville's own code, decides this one: Massachusetts General Laws Chapter 40A, Section 3 bars any zoning ordinance or by-law from prohibiting or unreasonably regulating solar energy systems, unless a restriction is necessary to protect public health, safety or welfare. That sentence binds Somerville's Zoning Board of Appeals and Inspectional Services Department, but it does not reach a private condominium association's or HOA's own governing documents.

Key details: Governing statute: M.G.L. c. 40A, § 3. Protected use: Installation of solar energy systems. City's exception: Health, safety, or welfare regulation only. Not covered: Private condo/HOA governing documents. Enforcing city bodies: Zoning Board of Appeals, Inspectional Services.

Section 3 carries no fine schedule of its own: it is a preemption clause that voids a conflicting zoning provision rather than punishing anyone. If Somerville's Zoning Board of Appeals or Inspectional Services Department denies a solar permit by citing a zoning restriction that is not tied to a genuine health, safety or welfare concern, that denial is itself unlawful and can be challenged; a private HOA's solar restriction, by contrast, is enforced or challenged as a contract matter under the association's own documents, not under this statute.

The rules around hoa restrictions in Somerville lean permissive, but that does not mean anything goes.

The Bottom Line

Compared to many U.S. cities, Somerville 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.

All of the above reflects Somerville's municipal code as of our last review. If you need specifics on fines, exemptions, or filing requirements, the detailed ordinance pages linked above have the full breakdown.