Massachusetts Building Permits — Complete Guide (2026)
Find, Apply & Track Permits in Cities and Counties Across Massachusetts
Massachusetts has a strong statewide building code and some of the highest permit standards in the Northeast. Boston's permitting system is complex; suburban communities are more straightforward. A new 2024 ADU law is expanding access statewide.
How building permits work in Massachusetts
Building permit requirements and processing times in Massachusetts vary by city and county. Use the links below to apply, check status, schedule inspections and find permit information for your location.
Learn the step-by-step permit process →Not sure where to apply?
Enter your city or address to find your permit office.
Permit costs by type — Massachusetts
| Permit Type | Fee Range | Processing Time | Notes |
|---|---|---|---|
| Electrical | $125–$300 | 1–5 days | Licensed electrician required — no exceptions |
| Plumbing / Gas | $100–$280 | 1–5 days | Combined plumbing and gas permit common |
| HVAC / Mechanical | $125–$350 | 2–7 days | Gas work requires licensed gasfitter |
| Roofing | $150–$400 | 1–5 days | CSL required unless owner-builder |
| Deck / Patio | $175–$500 | 2–5 weeks | Frost-line footings required (42 inches) |
| Room Addition | $500–$1,500 | 3–8 weeks | Stretch energy code may apply |
| New Construction | $1,000–$3,500 | 4–12 weeks | Stretch energy code in many communities |
| ADU | $500–$1,200 | 3–8 weeks | 2024 state law improving access statewide |
| Solar | $125–$350 | 2–7 days | SREC program — top solar incentive market |
| Fence | $75–$200 | 1–5 days | Frost-line posts required in most towns |
Major Massachusetts cities — apply online
Most Massachusetts building permits are issued by cities. Click your city to access the permit portal, apply online, or check permit status.
Permit costs by county — top Massachusetts counties
County building departments handle unincorporated areas. Click a county to access its permit portal directly.
How to get a building permit in Massachusetts
Find your local building department
Massachusetts has 351 cities and towns, each with its own building department. Some small towns share a building inspector. Permitting is handled locally — there is no state portal.
Determine CSL requirement
Most permitted construction requires a licensed Construction Supervisor. Homeowners can apply for an owner exemption for their primary single or two-family home. Trade work always requires licensed contractors.
Submit application to local building department
Applications go to your city or town building department. Boston uses an online portal (ISD). Suburban communities often still use paper applications.
Energy compliance check
Massachusetts has an optional Stretch Energy Code adopted by over 300 communities. If your town has adopted it, projects must meet higher energy efficiency standards — confirm before designing your project.
Inspections
Massachusetts requires inspections by the local building inspector. Trade inspections (electrical, plumbing, gas) are done by separate state-licensed inspectors. Schedule all inspectors separately.
ADU permits in Massachusetts — what you need to know
🏠 Massachusetts ADU-friendly status: Partial — improving under 2024 law
Massachusetts passed the MBTA Communities Act (HB 3135) in 2022 requiring ADU-friendly zoning near transit. Boston allows ADUs in all residential districts. The state also has a Home Rule process allowing cities to further streamline ADU permitting.
Find a licensed Massachusetts contractor
Massachusetts requires licensed professionals for most permitted work. Always verify a contractor's license before hiring — it protects you and is required for most permit types.
General Contractors
Find pre-screened general contractors for your Massachusetts home project. Compare quotes on permitted work.
Find a Contractor →Verify HIC Registration
Verify your contractor holds a valid Massachusetts Home Improvement Contractor (HIC) Registration license before any permitted work begins.
Verify HIC Registration →Electricians & Plumbers
Specialty-licensed electricians and plumbers are required for all permitted electrical and plumbing work in Massachusetts.
Learn More →Ready to get started? Browse verified, licensed contractors serving Massachusetts homeowners and get free quotes on your project.
🔍 Find a Contractor Near YouFrequently asked questions — Massachusetts permits
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