Boston building permit guide: short form vs long form, fees, lookup and inspections
Boston building permit guide: short form vs long form, ISD fees, the online portal, permit lookup by address, zoning review and inspections in Boston, MA.
Mateus MagnoLicensed Construction Supervisor · October 20, 2026 · 4 min read
Boston's Inspectional Services Department uses two building permits: a short form for minor work that does not change a building's structure or use ($20 plus $10 per $1,000 of estimated cost) and a long form for major alterations, changes of use and new construction ($50 plus $10 per $1,000). You apply in the ISD online portal, and starting work before the permit is issued can cost you double the permit fee.
If you are planning work on a house or condo in Boston, the first question is which Boston building permit you need: a short form or a long form. The answer depends on whether your project changes the building's structure or use, and it decides your fee, your paperwork and how long review takes.
Here is the short version. Minor repairs and alterations go on a short form. Major renovations, structural changes, changes of occupancy and new buildings go on a long form, which needs stamped plans and a certified plot plan. Below I walk through fees, the portal, permit lookup by address, zoning, inspections, and how Boston compares with Somerville and Cambridge, where I do most of my work.
Short form vs long form Boston building permit
Both permits come from Boston's Inspectional Services Department (ISD). Here is how they compare, based on the city's short form permit page and long form permit page.
| Short form | Long form | |
|---|---|---|
| Used for | Minor alterations, repairs or replacements that do not change structure or use (for example, opening up a wall) | Major alterations, changes to structure or use, change of occupancy, new construction |
| Fee | $20 application fee plus $10 per $1,000 of estimated cost | $50 application fee plus $10 per $1,000 of estimated cost |
| Plans | Depends on the work | Stamped plans by a Massachusetts registered architect or engineer, plus a certified plot plan |
The most common long form type is Long Form/Alteration/Change of Occupancy. The Erect/New Construction option is for a brand-new building. If you are not sure which one fits, ISD asks you to call before you file.
Who can apply, and how the online portal works
- Homeowners can apply for work they do themselves on a 1–2 family, owner-occupied home.
- Condo owners in a building with 3 or more units must hire a licensed contractor.
- Contractors must apply in their own licensed name. The city says office staff or third parties cannot file for them.
Applications go through the ISD online permit portal. You create an account, pick the permit type and upload documents. One catch: once you submit, you cannot edit or add files until ISD reviews it, so upload everything the first time.
Boston building permit fees (and the double-fee rule)
Fees are based on your estimated cost of work and are due up front. Quick math for a $40,000 long form job: $50 + (40 x $10) = $450. The same job on a short form would be $420.
The rule people miss: do not start work before the permit is issued. Boston's permit pages say ISD may charge double the permit cost or issue a building code violation. The city's homeowner permit guide adds that you may also have to fix or remove unpermitted work.
Boston building permit lookup by address
Buying a house or checking a contractor's past work? There are a few ways to look up a Boston building permit:
- Current applications: use the city's Permit Finder to check status.
- Past permits: the historical permit records page links to an ISD document search and an open-data list of permits issued after December 15, 2009. All you need is the address.
- In person: ISD's office at 1010 Massachusetts Avenue, 5th floor. The city notes building plans can only be viewed there.
Zoning review, the ZBA and other approvals
Every permit gets checked against the Boston Zoning Code. If your project doesn't comply, you get a denial and can appeal to the Zoning Board of Appeal. Per the city's ZBA appeal page:
- You must appeal within 45 days of your denial letter.
- The fee is a $150 flat fee for residential buildings with three units or fewer.
- The hearing date is published at least 20 days ahead.
Some projects also need sign-off from Parks and Recreation (work within 100 feet of a park or parkway) or the Landmarks Commission (historic districts). ISD will not request those for you. And if your property has no Record of Occupancy on file, the owner has to call ISD for a confirmation inspection first.
Inspections and closing the permit
- Work must start within six months of issuance. Some project types can get a 180-day extension.
- Schedule inspections through the portal or ISD at 617-635-5300. An inspector reaches out within 48 hours.
- The licensed contractor must be on site.
- After you pass, confirm the permit shows closed in the portal. An open permit can cause trouble when you sell.
How Boston differs from Somerville and Cambridge
The building code is the same statewide, but each city's process is different:
- Somerville has one city portal for everything. You file a building permit in the Citizenserve portal and pay a review fee up front. Zoning relief and historic applications go through the same portal. Full walkthrough: my Somerville building permit guide.
- Cambridge has its own portal, fees and zoning rules. See my Cambridge building permit guide.
- Boston sends zoning denials to the ZBA through ISD's denial letter, and it requires stamped plans and a certified plot plan for every long form.
If you own a triple-decker or a 1900s two-family on the Boston–Somerville line, check which city your lot is actually in before you file anything.
Need a hand?
I handle permits for my clients across Greater Boston as a licensed Construction Supervisor, from choosing the right form to passing the last inspection. Book a free walkthrough and I'll send you a written line-item budget, usually within 48 hours.
Frequently asked questions
What is a short form building permit in Boston?
It is Boston ISD's permit for minor alterations, repairs or replacements that do not change a building's structure or use. The fee is $20 plus $10 per $1,000 of estimated cost.
How much is a long form building permit in Boston?
Boston charges a $50 application fee plus $10 per $1,000 of the estimated cost of work, paid up front. A $40,000 project works out to $450.
How do I look up building permits by address in Boston?
Use Boston's Permit Finder for current applications. For past permits, the city's historical permit records page links to an ISD document search and an open-data list of permits issued since December 15, 2009.
What happens if you start work before getting a permit in Boston?
Boston ISD may charge double the permit cost or issue a building code violation. You may also have to fix or remove the work.
Mateus Magno is the founder of Magno & Co — a licensed Massachusetts Construction Supervisor (CS-123658), registered Home Improvement Contractor (HIC #220484) and certified Lead-Safe Renovator Supervisor who has renovated and managed over $3 million in projects across Greater Boston.
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