Solar Permit in Boston, Massachusetts
By Mario Bailey Last checked 2026-06-18 · 2 official sources
Verified against official sources Confirmed on official pagePermit required
Quick answer
Both a building permit and an electrical permit are required for all residential solar panel installations in Boston. Systems under 20 kWh on 1-2 family homes use a short-form permit with a structural engineer's report and homeowner waiver. Systems 20 kWh or larger or on 3 or more family buildings require a long-form permit with architect or engineer-stamped plans.
Who is pulling this permit?
Apply yourself
Hire it out
Before you sign, ask the contractor:
- Who pulls the permit, you or me, and is the permit fee included in the bid?
- Which inspections will this job need, and who meets the inspector on site?
- Is your contractor license active in this locality, and under which business name?
Want a pro to handle this permit? Request free help
Tell us where your project stands. Free to ask; no obligation.
Where we have a vetted local pro who handles permits in Boston, we connect you; otherwise we reply with the exact steps and office links for your situation. PermitNotebook is not a government agency and does not file permits. This is a free referral request; we may earn a fee if you hire a pro we introduce. Partners never influence our permit data. Privacy policy.
When a permit is usually needed
Before installing any residential solar PV system
What solar permit costs in Boston
Systems under 20 kWh on 1-2 family homes qualify for Short-Form at $20 primary plus $10 per $1,000 of estimated cost; 20 kWh and up or 3+ family buildings need Long-Form at $50 primary plus $10 per $1,000, plus a separate Electrical Permit, per the ISD fee schedule effective 5/15/2023.
How to apply in Boston
A rooftop solar PV permit application is a combined structural and electrical plan set: a site plan and roof framing details proving the array's mounting can carry its added loads, plus a one line electrical diagram covering listed modules and inverters, disconnects, and the rapid shutdown design. Utility interconnection is a separate approval that runs in parallel with the permit.
What most solar permit applications include:
- Both a building permit and a separate electrical permit are required, since the array must be designed and installed to the residential code's solar provisions and to the National Electrical Code (IRC R324.3).
- The plan set identifies listed equipment: PV modules listed to UL 1703 (or both UL 61730-1 and UL 61730-2), and inverters listed to UL 1741, with grid-tied inverters listed for utility interaction (IRC R324.3.1).
- Structural drawings show that the roof framing is designed to structurally support the array and withstand the gravity loads it adds (IRC R324.4.1).
- The site plan lays out roof access pathways at least 36 inches wide, plus a ridge setback sized to how much of the roof the array covers, so firefighters retain pathways and ventilation access (IRC R324.6.1, IRC R324.6.2).
- The one line electrical diagram shows the rapid shutdown method and the location of its single initiation device, since one control point must bring all system conductors down to safe levels (NEC 690.12, NEC 690.56(C)).
- Interconnecting the array to the utility grid at a defined point of connection is a separate application process from the local building or electrical permit and must be approved before the system can operate (NEC 705.12).
- Some permitting offices route applications through SolarAPP+, an automated review platform that checks the plan set against code requirements and issues eligible permits instantly (DOE SolarAPP+).
General submittal guidance from IRC 2021 R324 (Solar Energy Systems) and NEC 2020 Article 690 (Solar Photovoltaic Systems) and Article 705 (Interconnected Power Production Sources). Source. Inspectional Services Department sets the exact checklist for Boston.
Where to apply in Boston:
Inspectional Services Department
- 1010 Massachusetts Avenue, 5th Floor, Boston, MA 02118
- Phone: (617) 635-5300
- Email: isd@boston.gov
Inspections and closing out your permit
Inspectors verify the installed array against the approved plans, and some agencies run a rough check of roof attachments and penetrations while they are still exposed before the wiring and roofing close them in. The final inspection confirms rapid shutdown, disconnects, grounding, and required labels are installed correctly, and the system cannot be energized until the utility separately approves interconnection.
- Where an agency runs a rough or pre-inspection, it checks the array's roof penetrations while they are still exposed, confirming they are flashed and sealed (IRC R324.4.3).
- The inspector confirms whether rapid shutdown is required, how it is accomplished, and that it is properly identified (NEC 690.12, NEC 690.56(C)).
- PV disconnecting means must be permanently marked and installed where they are readily accessible, which the inspector confirms in the field (NEC 690.13).
- Bonding and grounding of the array, including every exposed non current carrying metal part and the grounding electrode system, is checked before sign off (NEC 690.43, NEC 690.47).
- At the service equipment, the inspector looks for the required rapid shutdown placard, a labeled diagram showing the initiation device's location in the specified colors and letter sizes (NEC 690.56(C)).
- Utility interconnection is inspected and approved separately from the local building department's sign off, and the system cannot be energized until both approvals are in hand (NEC 705.12).
Schedule each inspection in advance and pass the final before you use the work or close the permit. Request inspections through the Boston permit portal or by phone at (617) 635-5300.
Inspection sequence from NEC 2020 Article 690 (690.12 rapid shutdown, 690.13 disconnects, 690.43/690.47 grounding, 690.56 labeling) and IRC 2021 R324.4.3 (roof penetrations). Source. An open permit left un-inspected can surface later in a title search or home sale.
Your Solar Permit checklist for Boston
- Confirm the requirement. Yes, a permit is required. Usually needed: Before installing any residential solar PV system.
- Budget the fee. Systems under 20 kWh on 1-2 family homes qualify for Short-Form at $20 primary plus $10 per $1,000 of estimated cost; 20 kWh and up or 3+ family buildings need Long-Form at $50 primary plus $10 per $1,000, plus a separate Electrical Permit, per the ISD fee schedule effective 5/15/2023. Official fee schedule.
- Apply. A rooftop solar PV permit application is a combined structural and electrical plan set: a site plan and roof framing details proving the array's mounting can carry its added loads, plus a one line electrical diagram covering listed modules and inverters, disconnects, and the rapid shutdown design. Utility interconnection is a separate approval that runs in parallel with the permit. Start at the Boston permit portal.
- Keep the office details handy. Inspectional Services Department. Phone: (617) 635-5300. Address: 1010 Massachusetts Avenue, 5th Floor, Boston, MA 02118.
- Plan for inspections. Inspectors verify the installed array against the approved plans, and some agencies run a rough check of roof attachments and penetrations while they are still exposed before the wiring and roofing close them in. The final inspection confirms rapid shutdown, disconnects, grounding, and required labels are installed correctly, and the system cannot be energized until the utility separately approves interconnection.
Compiled from the official sources on this page. Last checked 2026-06-18.
The checklist stays on this page either way. We may send occasional verified rule-change notes for your area; unsubscribe anytime. See our privacy policy.
Permitting activity in Boston
In 2024, Boston authorized permits for 1,789 new residential housing units (72 single-family, 1,717 in multi-family buildings), valued at $812M, down from2,051 the year before. That works out to about 2.6 permits per 1,000 residents.
Source: U.S. Census Bureau, Building Permits Survey, 2024 annual data · population 691,531.
About Boston
Boston has about 307,840 housing units. The median home is valued at $710,400, against a median household income of $94,755. About 35% of homes are owner-occupied, and the typical home was built around 1947.
Source: U.S. Census Bureau, American Community Survey 2023 5-year.
Frequently asked questions
- Do you need a solar permit in Boston?
- Both a building permit and an electrical permit are required for all residential solar panel installations in Boston. Systems under 20 kWh on 1-2 family homes use a short-form permit with a structural engineer's report and homeowner waiver. Systems 20 kWh or larger or on 3 or more family buildings require a long-form permit with architect or engineer-stamped plans. Always confirm with the Inspectional Services Department before starting.
- How much does a solar permit cost in Boston?
- Systems under 20 kWh on 1-2 family homes qualify for Short-Form at $20 primary plus $10 per $1,000 of estimated cost; 20 kWh and up or 3+ family buildings need Long-Form at $50 primary plus $10 per $1,000, plus a separate Electrical Permit, per the ISD fee schedule effective 5/15/2023. See the official fee schedule for current amounts.
- Where do you apply for a solar permit in Boston?
- You can apply through the Boston permit portal or contact the Inspectional Services Department directly. The links are listed on this page.
- Can a homeowner pull a solar permit themselves in Boston?
- Under Massachusetts law (780 CMR R105.3; 780 CMR 110.R5.1.3.1 (10th ed.); M.G.L. c. 142, s. 3; M.G.L. c. 141, s. 1A): Yes for the building permit itself: 780 CMR R105.3 says 'the owner or authorized agent shall file a permit application.' The construction supervisor license (CSL) rules contain an explicit homeowner exemption at 780 CMR 110.R5.1.3.1: 'Any homeowner performing work for which a building permit is required shall be exempt from the licensing provisions of 780 CMR 110.R5, provided that if a homeowner engages a person(s) for hire to do such work, then such homeowner shall act as supervisor.' 'Homeowner' is defined as a person who owns a parcel on which he or she resides or intends to reside with a one- or two-family dwelling; a person who constructs more than one home in a two-year period does not qualify. The exemption does not extend to the trades: plumbing and gas work requires licensure under M.G.L. c. 142, s. 3, which contains no homeowner exemption, and the electrician licensing exemptions in M.G.L. c. 141, s. 1A likewise do not include homeowners. Confirm how Boston applies this before you apply.
From the Library
What else needs a permit in Boston
Every other permit type we have verified for this jurisdiction, with the rule that applies here.
| Project | Permit needed? | Threshold | Typical fee |
|---|---|---|---|
| Bathroom Remodel Permit | It depends | Not specified | Non-structural bathroom work uses the Short-Form building permit at $20 primary plus $1... |
| Deck Permit | It depends | detached decks not more than 30 inches above grade and under 200 sq ft that do not serve an exit door may be exempt | Billed as building work: Short-Form at $20 primary plus $10 per $1,000 of estimated cos... |
| Electrical Permit | Permit required | Not specified | $20 application fee plus $0.25 per amp for service upgrades or $1 per fixture for other... |
| EV Charger Permit | Permit required | Not specified | An Electrical Permit is required per Boston's EVSE installation guide, billed under the... |
| Fence Permit | It depends | permit required for fences over 6 feet in height per Massachusetts 780 CMR | Not published |
| HVAC Permit | Permit required | Not specified | No single HVAC line; |
| Plumbing Permit | Permit required | Not specified | $20 application fee plus $5 per fixture such as toilets and sinks |
| Pool Permit | Permit required | Not specified | Pools need a Use of Premises Permit at a $50 primary fee per the ISD fee schedule effec... |
| Roof Replacement Permit | Permit required | Not specified | Roof replacement with no structural change uses the Short-Form building permit at $20 p... |
| Shed Permit | It depends | one-story detached accessory sheds used for tools or storage are exempt if floor area does not exceed 120 sq ft | Sheds need a Use of Premises Permit at a $50 primary fee, named alongside pools on the... |
| Water Heater Permit | Permit required | Not specified | Water heater or boiler swaps with no other work use a Plumbing Permit at $20 primary pl... |
Official sources
Verified by a person against the sources above on 2026-06-18, not confirmed with Inspectional Services Department. Rules change; confirm before you build. How we verify.
Last checked: 2026-06-18Report an error on this page
Compare Solar Permit requirements across Massachusetts localities