Boston building permits for shops and restaurants

Key takeaways

• The City of Boston’s Inspectional Services Department (ISD) issues building permits at 1010 Massachusetts Avenue, 5th Floor, and takes applications through its online permit portal.
• A Short-Form Permit costs $20 plus $10 per $1,000 of estimated work cost, and a Long-Form Permit costs $50 plus $10 per $1,000, according to ISD’s permit pages as checked on November 13, 2026.
• Changing a space’s use, for example turning a retail shop into a restaurant, calls for a Long-Form Permit and a new Certificate of Occupancy.
• Starting work before ISD issues the permit can bring a charge of double the permit cost or a building code violation.
• A restaurant that seats 50 or more people also needs a Place of Assembly Permit from the Boston Fire Department.
• An appeal to the Zoning Board of Appeal must be filed within 45 days of an ISD refusal letter and costs $150 per violation for commercial buildings.

This guide is for owners and managers who are fitting out a shop, cafe or restaurant in Boston. A Boston building permit is the written approval from the City of Boston’s Inspectional Services Department (ISD) that lets construction, renovation or a change of use begin at a specific address. Most storefront projects need one of two: a Short-Form Permit for minor work, or a Long-Form Permit for work that changes a building’s structure or use. A licensed contractor normally files the application.

The sections below cover when a permit is required, how the two forms differ, ISD’s published fees, required documents, review times, restaurant approvals, zoning refusals and the Certificate of Occupancy. Brookline, Cambridge and Somerville are separate municipalities with their own building departments, so nothing here applies to a space across the city line.

When do you need a building permit in Boston?

You need a building permit in Boston before you start construction, and that includes most interior work on a storefront. ISD’s guide Navigating the Permit Process says building, electrical, plumbing and gas permits “must be applied for before doing work.” The rules ISD enforces come from two levels of government. The Massachusetts State Building Code (780 CMR) is state law, and M.G.L. c. 143, s. 3 makes each city’s building commissioner or inspector of buildings responsible for enforcing it. The Boston Zoning Code is a city rule.

One exception: a business on state property does not get its permits from ISD. The City’s restaurant guide sends those owners to the state building department instead. ISD takes questions about whether a small repair needs a permit at 617-635-5300.

What is the difference between a short-form and a long-form permit?

A short-form permit covers minor work, and a long-form permit covers major work that changes a building’s structure or use. ISD defines the Short-Form Permit as the permit for opening up a wall and for minor alterations, repairs or replacements that do not change the structure or use of a building or lot.

The Long-Form Permit is the permit for major alterations or renovations. ISD’s examples include new construction and additions, structural repairs, a change of use or occupancy, a new sprinkler or fire alarm system, and a higher capacity inside the building.

Signs follow the same split. According to the City’s business sign page, work on an existing sign takes a Short-Form Permit, a new sign where none existed takes a Long-Form Permit, and any wiring needs an Electrical Permit pulled by a licensed contractor.

How much does a Boston building permit cost?

A Boston building permit costs a flat application fee plus $10 for every $1,000 of estimated work cost. The table lists the fees ISD published on its permit pages as of November 13, 2026. All are City of Boston fees.

Permit or certificate	Published fee
Short-Form Permit	$20, plus $10 per $1,000 of estimated cost
Long-Form Permit	$50, plus $10 per $1,000 of estimated cost
Electrical Permit (no change in service)	$20, plus $1 per fixture, plug or outlet and $5 per approved meter
Plumbing Permit	$20, plus $5 per fixture
Certificate of Occupancy	$50, plus 1 percent of total construction cost

On those rates, a long-form build-out estimated at $40,000 carries a $450 permit fee: $50 plus 40 times $10. ISD collects all fees up front, online by credit or debit card, or in person by card, cash or check. For the Certificate of Occupancy, ISD recalculates the fee at the end of the job if the actual cost came in higher than the estimate.

Who can apply for a Boston building permit, and what do they submit?

A licensed contractor applies for a Boston building permit on a commercial space. ISD lets homeowners apply only when they do the work themselves in an owner-occupied one-family or two-family home, which leaves a shop or restaurant owner relying on a contractor. The name on the trade license must match the applicant.

ISD’s permit pages list these uploads for a contractor’s application:

• A short description of the work and the estimated total project cost
• Design plans stamped by a Massachusetts registered engineer or architect, and a certified plot plan
• A front and back copy of a valid trade license
• A current Certificate of Liability Insurance and the Massachusetts Workers’ Compensation Affidavit
• The signed contract, the Site Safety Plan Affidavit and the Mattocks-Higgins Affidavit of Workplace Safety

A fire protection plan and narrative are added when the job touches fire protection. The portal locks an application once it is submitted, until ISD has reviewed it.

How long does a Boston building permit take?

A Boston building permit takes anywhere from a few days to more than a year, depending on the form and on zoning. ISD’s sources do not give one number. Its 2024 process guide says a short-form permit “may take 1 week” with correct documents and a long-form permit four to five weeks when no building or zoning relief is needed. The City’s newer restaurant construction guide says long-form permits can take several months to over a year.

Two things slow an application. Some addresses have no Record of Occupancy on file, and the portal then shows “Please Confirm Occupancy.” Only the property owner can call ISD to request the confirmation inspection, so ask your landlord early. Projects may also need sign-off from the Boston Planning Department, the Parks and Recreation Department (work within 100 feet of a park or parkway) or the Boston Landmarks Commission (historic districts).

ISD’s Fast Track Program, which promises office renovation permits within seven days, cannot be used for commercial retail space. After a permit is issued, work has to start within six months.

What extra approvals does a restaurant build-out need in Boston?

A restaurant build-out in Boston needs a health plan review, fire permits and trade permits on top of the ISD building permit. The City’s restaurant guide lists four items for any construction in a food establishment:

• A plan review from ISD’s Health Division, required for a new restaurant, a layout change or new equipment (allow at least two to six weeks)
• Building permits from ISD’s Building Division
• Construction permits from the Boston Fire Department, including fire alarm and sprinkler permits
• Trade permits for electrical, plumbing and similar work, issued by ISD to licensed contractors only

Seating matters too. The Boston Fire Department requires a Place of Assembly Permit for any space where 50 or more people gather, renewed every year, with fees of $160 to $6,500 a year based on capacity. A new owner who takes over an existing restaurant with no renovation and no new equipment does not need the health plan review.

What happens if Inspectional Services refuses a permit over zoning?

Inspectional Services refuses a permit when the proposed work or use does not conform to the Boston Zoning Code, and the applicant can then appeal to the Zoning Board of Appeal (ZBA). The ZBA is the city board that grants variances and conditional use permits. ISD’s appeal instructions set a 45-day filing deadline from the refusal letter and a fee of $150 for each violation on commercial buildings.

The steps run in this order:

1. File a Long-Form Permit application with ISD and receive the refusal letter.
2. File the appeal within 45 days and pay the fee.
3. Work with the Office of Neighborhood Services liaison on community review, which can include an abutters’ meeting.
4. Attend the ZBA hearing at Boston City Hall, Room 801.

The City estimates three to six months for a full zoning appeal. You can check a parcel before signing a lease with the Zoning Viewer, where each use is marked A (allowed), C (conditional) or F (forbidden).

Do you need a new certificate of occupancy for a shop or restaurant?

You need a new certificate of occupancy when your project is new construction, a major renovation or a change of use. A Certificate of Occupancy (CO), also called a Record of Legal Occupancy, is ISD’s confirmation that a space is safe and legally approved for its intended use. Converting a retail space to a restaurant is one of ISD’s own examples of a change that requires one.

You do not need a new CO if you take over an existing business at a location that already has a CO for that use, the space has no special zoning conditions (provisos) attached, and you make no change to the use. Provisos granted to a previous owner do not transfer automatically.

No separate application exists for the CO. Your contractor uploads final inspection sign-offs and an itemized final cost breakdown, and both ISD and the Boston Fire Department must approve. ISD says it issues the CO within 10 days once inspections pass and documents are approved. The certificate does not expire.

What should you recheck before you act?

Each item below was checked on November 13, 2026 against the page named. Fees and timelines are set by the City of Boston and can change without notice.

• Every fee in the table, including Short-Form ($20 plus $10 per $1,000) and Long-Form ($50 plus $10 per $1,000): each permit’s page on boston.gov.
• Review times: ISD’s 2024 guide and the City’s restaurant guide give different estimates, so ask ISD at 617-635-5300 about your project.
• Place of Assembly fees ($160 to $6,500 a year) and the 50-person threshold: Boston Fire Department, Fire Prevention Division, 617-343-3628.
• ZBA appeal fee ($150 per violation) and the 45-day deadline: ISD’s appeal page, plus your own refusal letter.

This guide is general information, not legal or tax advice. Rules and fees change; confirm the current requirements with the agency named before you file or pay.

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