All Cities / MA / Boston
How Much Does a Building Permit Cost in Boston?
✓ Verified from published fee schedule
Based on Inspectional Services Department (ISD) published fee schedule
Data last verified: March 23, 2026
All trade fees confirmed from official Boston.gov Building Division fee schedule.
Permit Cost by Project
Kitchen Remodel$395
Building Permit ($25K project)$300
Bathroom Remodel$270
Deck / Patio$170
Solar Panel Installation$170
Building Permit ($12K project)$170
Demolition$150
Roof Replacement$140
Building Permit ($8K project)$130
Siding Replacement$120
Fence Permit$100
Window Replacement$100
Electrical Panel$70
Electrical Permit$70
EV Charger Installation$40
HVAC Replacement$25
Water Heater$25
Plumbing Permit$25
HVAC / Mechanical Permit$25
Do You Need a Permit?
No — Paint, cosmetic updates, fixture swaps
Yes — Bathroom remodel ($270)
Yes — Kitchen remodel ($395)
Yes — Roof replacement ($140)
Yes — HVAC replacement ($25)
Yes — Water heater ($25)
Yes — Deck / patio ($170)
Yes — Window replacement ($100)
Yes — Electrical panel ($70)
Yes — Solar panels ($170)
Verified Permit Cost by Project Type
Kitchen Remodel
$395
Building, Electrical, Plumbing
Building Permit ($25K project)
$300
Building
Bathroom Remodel
$270
Building, Electrical, Plumbing, Mechanical
Deck / Patio
$170
Building
Solar Panel Installation
$170
Building, Electrical
Building Permit ($12K project)
$170
Building
Demolition
$150
Demolition
Roof Replacement
$140
Building
Two Types of Permits
Building Permit
Structural & Major Work
Covers structural changes, additions, remodels, and major renovations. Required when you're changing the layout, load-bearing walls, or footprint of your home.
Usually pulled by: General contractor or homeowner
Trade Permit
Specialty Systems
Covers plumbing, electrical, HVAC/mechanical, and roofing. Required when you're touching water lines, wiring, ductwork, or roof structure. Most remodels need trade permits on top of the building permit.
Usually pulled by: Licensed trade contractor (plumber, electrician, HVAC tech)
Work that typically requires a permit:
• New construction (residential or commercial)
• Additions: garage, deck, porch, ADU, carport
• Expanding or demolishing an existing structure
• Swimming pool installation
• HVAC installation or replacement
• Adding, moving, or removing walls
• Roof installation or replacement
• Finishing a basement
• Solar panel installation
• EV charging station installation
• Generator installation
• Fence installation
• Siding installation
• Window installation or replacement
Work that usually doesn't need a permit:
• Painting interior or exterior walls
• Installing cabinets without changing the layout
• Replacing carpet or flooring
• Replacing fixtures in the same location
• Cosmetic updates (countertops, backsplash, trim)
• Landscaping and yard work
Rules vary by city. When in doubt, call your local building department before starting work.
Permit Cost Calculator · Boston
$270
Verified total permit cost in Boston
✓ Verified from Inspectional Services Department (ISD) published fee schedule
Boston charges fifty dollars plus ten dollars per thousand for major building permits. A fifteen thousand dollar bathroom runs two hundred dollars just for the building portion. Add plumbing and electrical and you hit two hundred seventy dollars total. I pulled every number from the Boston ISD Building Fees PDF revised May 15 2023. The system isn't complicated but it isn't one single fee either.
How Boston Calculates Building Permit Fees
Boston splits work into long form and short form permits. Long form covers major construction additions and structural changes at fifty dollars base plus ten dollars per thousand. Short form handles reroofing siding windows and non structural jobs at twenty dollars base plus the same ten per thousand. A twenty five thousand dollar kitchen runs three hundred dollars on the building side alone.
Plumbing adds twenty dollars plus five dollars per fixture. A bathroom with four fixtures costs forty dollars. Electrical runs twenty dollars plus one dollar per fixture if you skip a service change. I had to cross reference the tables in the PDF three times to sort the tiers. (The calculator here handles all that math so you don't have to.)
Gas permits follow the same twenty dollar base plus five per appliance. No plan review fee appears in the schedule. No state surcharge shows up either. That keeps the numbers lower than many expect. A full bathroom remodel at fifteen thousand dollars ends up near two hundred seventy dollars total.
The structure rewards you for knowing which form applies. Pick wrong and the double fee rule kicks in. Check the scope carefully before you file.
Chuck’s Take
“Chuck here. I add permit costs as a separate line in every bid. Boston makes you chase multiple trades and those twenty dollar bases add up quick. Never assume the number is small.”
Leonard “Chuck” Thompson, LC Thompson Construction Co.
What Needs a Permit in Boston?
Painting papering tiling and carpeting don't need permits in Boston. The same goes for cabinets and countertops. You still need trade permits if you touch electrical plumbing or gas lines.
Decks require permits unless they stay under two hundred square feet stay under thirty inches above grade stay unattached and avoid serving an exit door. Most people fail at least one condition. Sheds under two hundred square feet qualify as exempt when detached. Fences under seven feet high need nothing.
Roof replacement always needs a permit. Window replacement does too unless the work stays truly minor. I checked the exemptions listed under 780 CMR 105.2. They're narrower than they first appear. Don't assume your project qualifies.
The building department catches unpermitted work through neighbor complaints and property sales. You can't undo that hassle easily.
What Happens If You Skip a Permit in Boston
Boston applies a double fee when work starts without a permit or the value gets undervalued. The rule comes straight from the fee schedule. State law backs it up under M.G.L. c.143 Section 94(a) and related codes.
Each day counts as a separate offense. Sections R114 and R115.3 give the building department clear power to issue stop work orders. Fines add up fast. Nobody wants that bill.
You also risk problems when you sell the house. Title companies flag unpermitted changes, and Insurance claims get denied. The math never works in your favor. Pull the permit.
How Long Is a Building Permit Good For in Boston?
Permits in Boston expire after one hundred eighty days if you don't start work. The same clock applies if you abandon the job for one hundred eighty days. The rules sit in R105.5.
You can request extensions in writing before the permit dies. Each extension runs another one hundred eighty days at most. The building department wants justifiable cause.
File early, and don't wait until materials arrive. I've seen too many projects stalled by timing mistakes.
Who Pulls the Permit in Boston?
Your contractor should pull the permit in Boston. They must hold a Home Improvement Contractor registration and list that number on the application. Homeowners can pull their own permits under the exemption in 780 CMR 110.R3.8.1.1 but the rules are strict.
The exemption doesn't apply to manufactured buildings. You must supervise the work yourself. Workers compensation proof is still required before issuance.
Never let a contractor talk you into pulling the permit. That's a red flag, and they want to shift liability. Make sure the contract states who handles permits. Confirm it happens.
Chuck’s Take
“I never let a homeowner pull the permit when I run the job. Liability stays on me that way. If a contractor in Boston pushes you to file yourself walk away. That never ends well.”
Leonard “Chuck” Thompson, LC Thompson Construction Co.
Boston Splits Every Trade Into Separate Permits
Boston doesn't bundle everything into one permit. You file for building work then add plumbing electrical and gas as needed. Each trade carries its own twenty dollar base fee in most cases. That structure feels tedious until you see the final numbers.
A kitchen remodel at twenty five thousand dollars totals three hundred ninety five dollars across four permits. The building department tracks each trade independently. No single massive fee surprises you at the counter.
Massachusetts runs plumbing and gas under separate state rules in 248 CMR. Boston follows but keeps the fees local. I noticed this pattern only after comparing the ISD PDF against other cities. The system isn't perfect but it stays predictable. If your project touches multiple trades budget for each one separately.
Quick Reference · Boston Permit Requirements
| Homeowner Task | Permit? | Est. Cost |
|---|---|---|
| Paint interior / exterior | NO | Cosmetic |
| Replace flooring | NO | Cosmetic |
| Replace kitchen cabinets (same layout) | NO | Cosmetic |
| Swap a light fixture (same location) | NO | Cosmetic |
| Replace a water heater | YES | $25 Plumbing |
| Add / move electrical outlets | YES | $70 Electrical |
| Remodel a bathroom | YES | $270 Building, Electrical, Plumbing, Mechanical |
| Remodel a kitchen | YES | $395 Building, Electrical, Plumbing |
| Replace / repair roof | YES | $140 Building |
| Build a deck or patio | YES | $170 Building |
| Build a fence (≤6 ft) | NO | Typically exempt |
| Install solar panels | YES | $170 Building, Electrical |
| Replace HVAC system | YES | $25 Mechanical |
| Replace windows (new opening) | YES | $100 Building |
∗ Costs are verified for Boston, MA from published fee schedule. Always confirm with your local building department.
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Frequently Asked · Boston
How much does a building permit cost in Boston?
A fifteen thousand dollar bathroom costs two hundred seventy dollars total in Boston. The building permit alone runs two hundred dollars under the long form rate. Plug your project value into the calculator for your exact number.
Do I need a permit to replace a water heater in Boston?
Yes you need a permit to replace a water heater in Boston. A standard electric unit costs twenty five dollars through the plumbing permit. Gas models need both plumbing and gas permits for fifty dollars total.
How much is a plumbing permit in Boston?
Plumbing permits in Boston start at twenty dollars plus five dollars per fixture. A bathroom with four fixtures costs forty dollars. That amount doesn't cover the separate building permit you'll also need.
Do I need a permit to build a deck in Boston?
Yes you need a permit in Boston to build most decks. A twelve thousand dollar deck costs one hundred seventy dollars under the long form fee. Only decks that meet every exemption condition escape the rules.
Do I need a permit for electrical work in Boston?
Most electrical work in Boston requires a permit. A two hundred amp panel upgrade costs seventy dollars. Simple fixture swaps run twenty dollars plus one dollar per fixture with no service change.
What is the difference between short form and long form permits in Boston?
Short form permits in Boston cover minor jobs like roofing siding and windows at a twenty dollar base. Long form applies to structural work and additions at a fifty dollar base. Both add ten dollars per thousand in value after the base.
Cite This Data
David Olson. (2026). Building permit fees in Boston, MA. PermitCalculator. https://permitcalculator.com/cities/boston-ma/
APA format
David Olson. “Building Permit Fees in Boston, MA.” PermitCalculator. Accessed April 21, 2026. https://permitcalculator.com/cities/boston-ma/
Chicago format
Data Attribution