Building Permits in Central Massachusetts
Most homeowners ask this the wrong way round. The question is not whether a project is big enough to need a permit — in Massachusetts the default is that a permit is required, and a short list of exemptions carves things out. This page covers what the state code actually says, the deck rule that catches people out, and the building department for six towns we work in.
We pull the permits on our own projects. This page is here because the towns publish this information in six different places and none of them in plain language.
The deck rule almost everyone gets wrong
A deck is exempt from a building permit only if it meets all four of these at once:
1. Not more than 200 square feet
2. Not more than 30 inches above grade at any point
3. Not attached to the dwelling
4. Does not serve one of the exit doors required under R311.2
So a deck attached to the house needs a permit no matter how small or how low it is. There is no square-footage shortcut for an attached deck. The exemption only ever reaches a freestanding, low platform that is not serving a required exit.
The 30-inch test is measured at any point, which is the other thing people miss. A deck that sits low at the house and steps down over sloping ground fails the test on its high side.
When a permit is required at all
The governing rule is 780 CMR 51.00 R105.1. In its own words, it is unlawful to “construct, reconstruct, alter, repair, remove or demolish a building or structure; or to change the use or occupancy of a building or structure; or to install or alter any equipment, or life safety systems” regulated by the code without first applying and obtaining the permit.
The exemptions homeowners ask about most
Under R105.2, these do not need a building permit:
One-storey detached sheds, playhouses and similar, under 200 square feet
Fences not over seven feet high
Decks meeting all four conditions above
Painting, papering, tiling, carpeting, cabinets and countertops
Two cautions. That is not the complete list — R105.2 has more items, and the full text is the thing to rely on. And the exemption is from the building permit only: electrical, plumbing and gas permits are separate and may still be required for the same job. Replacing a countertop needs no building permit; moving the sink under it is a different conversation.
Which code applies to your house
780 CMR is the Massachusetts State Building Code — the regulations, issued by the state Board of Building Regulations and Standards, that adopt the international model codes together with Massachusetts-specific amendments.
For a one- or two-family home the volume that applies is 780 CMR 51.00, the Massachusetts Residential Code, which adopts the 2021 International Residential Code with Massachusetts amendments. The current edition is the Tenth Edition, first effective 11 October 2024. The concurrency period during which the Ninth Edition could still be used ended 30 June 2025, so the Tenth Edition is now the only one in force. If a contractor is quoting you Ninth Edition requirements, the quote is out of date.
What a permit costs
There is no state-wide fee. Every town sets its own, and they do not use the same basis — most charge per $1,000 of construction cost, Harvard charges decks by the square foot. Minimums range from $50 to $215 across the six towns below, which means on a small job the minimum is usually what you pay rather than the rate.
Two things are near-universal and worth knowing before you start. Starting work without a permit doubles the fee in most of these towns, and Bolton adds $100 on top. And several towns now charge a surcharge for paper applications, or have stopped accepting them entirely.
Check the figures before you rely on them. Of the four published schedules below, Bolton’s is dated 2022, Sterling’s 2021 and Harvard’s 2021. We list the basis so you know what question to ask; the town is the authority on the number.
Building departments, six towns
Every one of these towns now takes permit applications online. Berlin and Harvard no longer accept paper at all.
Lancaster
Inspectional Services
701 Main Street, Suite 4
Phone: 978-365-3326 ext. 1095
Hours: Mon-Thu 8:30am-4:30pm, Fri 8:30am-noon
Applications: Patriot PermitPro
The town publishes electrical and plumbing/gas fees only; the building permit rate is not posted. There is a $30 surcharge on applications not submitted online.
Clinton
Building Department
Town Hall, 242 Church Street
Phone: 978-365-4128
Hours: Office Mon-Fri 7:00-9:30am; inspections 9:30am-noon. The staff directory lists different hours, so call first.
Applications: OpenGov
$12 per $1,000 of construction cost, $60 minimum. Paper submissions carry a $60 processing fee. Work started without a permit is charged double.
Bolton
Building / Inspection Services
663 Main Street
Phone: 978-779-3301
Hours: Inspector Tue 5-6pm and by appointment; office Mon/Wed/Thu and Tue mornings - call to confirm
Applications: OpenGov
Decks, additions and alterations at $10 per $1,000 of construction cost, $50 minimum; new dwellings $12 per $1,000. Schedule effective June 2022. Work without a permit is double the fee plus $100.
Sterling
Building Department
Butterick Municipal Building, 1 Park Street
Phone: 978-422-8111 ext. 2301
Hours: Mon-Thu 8am-4pm. Closed Fridays.
Applications: PermitLink
Decks and porches at $10 plus $10 per $1,000; $75 minimum on all residential permits. Schedule effective September 2021. Fees double if work has already begun.
Berlin
Inspectional Services
Municipal Building, 23 Linden Street, Room 216
Phone: 978-838-0046
Hours: Mon and Wed 9am-1pm; Tue and Thu by call or text - coverage is narrow, call ahead
Applications: OpenGov
No fee schedule is published on the town site; fees are shown in the portal at application. Berlin no longer accepts paper applications at all.
Harvard
Building Department
Hildreth House, 15 Elm Street
Phone: 978-456-4100 ext. 425
Hours: Mon-Thu 8am-4:30pm; inspections Mon, Wed and Thu
Applications: OpenGov (the town still calls it ViewPoint)
Harvard prices decks by area rather than construction cost: $0.30 per square foot for a standalone deck, $215 minimum. Schedule effective January 2021. Paper applications are no longer accepted.
Who should pull the permit — you or the contractor?
The contractor, and it is not a small point. A homeowner who pulls their own building permit gives up access to the state Guaranty Fund, which is the thing that can reimburse you if a registered contractor takes your money and does not finish. A contractor who asks you to pull the permit is moving that risk onto you.
Massachusetts requires the contract to state which party is responsible for permits, along with the notice about the Guaranty Fund. If the document in front of you does not say, it is not a compliant contract. Our guide to hiring a contractor in Massachusetts covers what else has to be in writing.
Common questions
Do I need a permit to replace a deck in the same footprint?
Yes, if the deck is attached to the house. Replacing structure is reconstruction, which R105.1 covers, and an attached deck has no exemption to fall back on regardless of size.
How much is a deck permit in Massachusetts?
It depends on the town and on how they calculate. In Bolton a deck is charged at $10 per $1,000 of construction cost with a $50 minimum; in Sterling $10 plus $10 per $1,000 with a $75 residential minimum; in Harvard $0.30 per square foot with a $215 minimum. On a typical deck the minimum fee is often what applies. Those schedules date from 2021 and 2022 — confirm with the town.
Do I need a permit to paint or re-tile?
No building permit for painting, papering, tiling, carpeting, cabinets or countertops. If the work moves plumbing, gas or electrical, those permits are separate and may still apply.
What happens if work was already done without a permit?
Most of these towns double the permit fee, and Bolton adds $100. The larger problem is usually at sale: unpermitted work can delay a closing, and the building department can require it to be opened up for inspection or removed.
Does a shed need a permit?
Not if it is one storey, detached, and under 200 square feet. Above that, or attached to anything, it does. Zoning setbacks are a separate question from the building permit and still apply.
The code requirements on this page come from 780 CMR 51.00, the Massachusetts Residential Code, Tenth Edition, and the Board of Building Regulations and Standards. Town details come from each town’s own website and were checked in September 2026. This is written by a Central Massachusetts contractor for homeowners and is not legal advice — your building department is the authority on your project.