The short answer
A mid-range full bathroom remodel in Boston runs about $11,050 to $34,450, and a primary bath $24,600 to $73,800. The building type matters most: in a triple-decker or an older colonial, the shower pan, the vent and the permit path decide the job more than the tile does.
What a bathroom remodel costs in Boston
Our numbers start with national remodeling cost data and apply the Boston construction cost factor of 1.23 from the U.S. Army Corps of Engineers. The same bathroom costs about 23% more here than the national average.
| Job | Boston (typical range) | US average |
|---|---|---|
| Half bath (powder room) remodel | $4,900–$17,200 | $4,000–$14,000 |
| Full bathroom, cosmetic refresh | $6,650–$20,650 | $5,400–$16,800 |
| Full bathroom remodel, mid-range | $11,050–$34,450 | $9,000–$28,000 |
| Full bathroom, high-end | $16,600–$51,650 | $13,500–$42,000 |
| Primary bathroom remodel | $24,600–$73,800 | $20,000–$60,000 |
| Tub-to-shower conversion | $2,450–$14,750 | $2,000–$12,000 |
| Tile, installed | $12.5–$49/sq ft | $10–$40/sq ft |
| New toilet, installed | $430–$985 | $350–$800 |
| New faucet, installed | $150–$370 | $120–$300 |
Estimates for 2026, including labor and standard parts. Boston prices use the metro's construction cost factor of 1.23 (US average = 1.00) from the U.S. Army Corps of Engineers Area Cost Factors. Your quote depends on access, materials and the condition of the home.
Tile is the biggest single line. Installed tile runs $12.50 to $49 per square foot here, so a tiled shower with a bench and a niche can cost more than the vanity, toilet and faucet combined. A new toilet installed runs $430 to $985, and a new faucet $150 to $370.
For your own room size, finish level and ZIP code, run the cost estimator below or open the full bathroom cost estimator.
Moving a drain: wood frame or slab
Most Boston-area houses are wood-framed. Triple-deckers, colonials and capes sit on a basement, a crawl space or a pier foundation, so a plumber can often reach a new drain line from below without cutting the bathroom floor. A moved toilet or shower drain costs less there than on a slab.
Postwar ranches in Quincy, Newton and the outer neighborhoods sometimes sit on a slab. There, moving a drain means saw-cutting the floor and trenching, and the price rises fast. A toilet also needs a 3-inch drain with a vent close enough to satisfy the plumbing code, so a small move can turn into a big one. Ask your remodeler which structure you have before the bid is signed.
What drives a Boston bathroom budget
| Choice | Lower cost | Higher cost |
|---|---|---|
| Shower | Tub with tile surround, same spot | Walk-in shower with glass, tub removed ($2,450 to $14,750 for the conversion here) |
| Tile | Ceramic on the walls, near $12.50 per sq ft installed | Large-format porcelain or stone, up to about $49 per sq ft |
| Toilet | Standard model swapped in place, $430 to $985 installed | Wall-hung toilet with a new carrier in the wall |
| Layout | Everything stays | Toilet or shower moved, wall shifted |
| Ventilation | Fan replaced in the same duct | New duct run to the outside wall |
Waterproofing and shower rules in Boston
A leaking shower soaks the framing and the ceiling below before anyone sees a stain. In a triple-decker, that ceiling belongs to someone else. The Massachusetts State Building Code, now the 10th edition, adopts the 2021 International Residential Code with state amendments, and the plumbing code is enforced by your local plumbing inspector.
What the inspector checks in the shower
- Pan: a continuous waterproof pan tied into the drain and flood-tested before any tile goes down.
- Walls: a waterproof backer behind the tile, not drywall, to the height the code requires above the drain.
- Valve: an anti-scald pressure-balance or thermostatic valve, so nobody is burned when a tap opens elsewhere in the building.
- Glass: tempered or laminated safety glass in shower doors and tub enclosures.
- Door: it must swing out and leave a clear opening.
- Fan: an exhaust fan ducted to the outside with a backdraft damper. Venting into the attic or a wall cavity fails inspection.
Why multifamily buildings need more
In a triple-decker or a condo, the shower sits over someone's kitchen. The building code covers sound and fire separation between units, and a remodel that opens a wall or ceiling can trigger those rules. Ask your remodeler how they will protect the unit below during demolition and how they will restore the ceiling. If the building is a condo, the association may also have rules about work hours, water shutoffs and insurance certificates before work starts.
Ventilation in a tight old house
Massachusetts is in climate zone 5A, and the Stretch and Specialized energy codes push tight envelopes and mechanical ventilation. When a bathroom remodel opens exterior walls, insulation and air sealing come into play. Cambridge, Brookline, Somerville and Newton have adopted the Specialized Code, and Boston, Cambridge, Newton and Quincy are among the more than 270 towns on the Stretch Code. For a bathroom, that means a fan that moves air and a duct that ends outdoors.
Lead-safe work in older homes
Much of the Boston-area housing stock is old enough to carry lead paint. Federal lead-safe renovation rules apply to work that disturbs painted surfaces in older homes, and Cambridge's Inspectional Services Department enforces the state Sanitary Code provisions on lead paint. Ask any remodeler working on an old bathroom for their lead-safe certification before demolition starts.
Water-saving fixture rules in Massachusetts
Massachusetts sets fixture flow limits through its plumbing code, and local inspectors check them at the rough and final stages. The practical rules for a Boston bathroom:
| Fixture | What to expect |
|---|---|
| Toilet | A low-flow model, checked at final inspection |
| Showerhead | A low-flow head, matched to the valve |
| Faucet | A low-flow aerator or fixture |
| Backwater valve | Cambridge offers a brochure on protecting your home from sewer backups with backwater valves, worth asking about in a basement bathroom |
If your remodeler proposes a fixture that does not carry the state's approval, the inspector can reject it at final. Buy fixtures from a supply house that sells in Massachusetts and keep the spec sheets.
Planning for aging in place
A bathroom remodel is the cheapest time to make the room work for someone with a walker or a bad knee, since the walls and floor are already open.
| Feature | What it involves | When to decide |
|---|---|---|
| Wood blocking for grab bars | Added in the wall framing before backer board goes up | At framing |
| Curbless shower | Recessed or sloped floor, linear drain, wider waterproofing | At design |
| Wider clearances | Room in front of and beside the toilet | At design, unless walls move |
| Lever handles | Faucet and shower controls that are easy to grip | At fixture selection |
Recessing the floor framing for a curbless entry is structural work, so the project needs plan review instead of a simple alteration permit. Decide before the drawings are finished.
Do you need a permit?
In Boston, a building permit is required before beginning most construction, demolition, modification and repair work, and permits must meet the State Building Code. The Inspectional Services Department issues short form building permits, electrical, plumbing and gas permits, and long form alteration permits. You can check a permit's status in the city's Permit Finder, and ISD answers permit questions at (617) 635-5300.
| Bathroom work | Permit |
|---|---|
| Paint, mirror, towel bars, floor tile only | No |
| Toilet, tub, valve or sink replaced in the same spot | Yes, plumbing |
| Tub-to-shower conversion with nothing structural | Yes, building and plumbing |
| New circuit, GFCI outlet or exhaust fan | Yes, electrical or mechanical |
| Moving a drain to a new spot | Yes, plumbing |
| Moved wall, recessed floor, larger window | Yes, building, with plan review |
Permit rules in the towns around Boston
Each city and town runs its own inspectional services department, and fees differ.
- Cambridge: Inspectional Services at 831 Massachusetts Avenue, (617) 349-6100. Building permit fees are $20 per $1,000 of construction cost, cut to $15 per $1,000 for residential projects of three units or less, with a $50 minimum. Plumbing fixture permits cost $50 for five fixtures and $5 for each additional fixture. Starting work before the permit triples the fee. Construction hours are Monday to Friday 7 a.m. to 6 p.m. and Saturday 9 a.m. to 6 p.m., and Sunday work needs a Police Department permit.
- Newton: Inspectional Services at 1000 Commonwealth Avenue, (617) 796-1060. All building, electrical, plumbing and gas permits are $20 per $1,000 of estimated cost, rounded up, with a $50 minimum. Every residential building permit gets Fire Department review, and floor plans must show smoke and CO detectors. Newton has a Fossil Fuel-Free Ordinance in effect since January 1, 2025, and its Specialized Energy Code applies to complete applications received after January 1, 2024.
- Brookline: Building Department at 333 Washington Street, (617) 730-2100. Building, electrical, plumbing, gas and mechanical permits are $20 per $1,000 of construction value, with a $50 minimum. Work started without a permit is penalized at $50 per $1,000 of value. Brookline's Fossil Fuel Free bylaw has been in effect since February 20, 2024, and major renovations cannot add combustion equipment.
- Somerville: A building permit is required for all interior and exterior work except painting, tiling and flooring. Homeowners of a 1 or 2 family dwelling who live there may pull the permit themselves; for 3 families or more, a licensed contractor must apply. Electrical and plumbing permits must be pulled by a licensed electrician or plumber. Construction hours are Monday to Friday 7 a.m. to 7 p.m. and Saturday 9 a.m. to 7 p.m.
- Quincy: All permits are online. The Inspectional Services Department is at 55 Sea Street, (617) 376-1450, and the Plumbing and Gas Department issues plumbing and gas permits under the Massachusetts Fuel Gas Code. Quincy runs free building, zoning and conservation clinics for homeowners every Thursday from 2 to 4 p.m. at the DPW Complex, 55 Sea Street, first come first serve.
How long a bathroom remodel takes in Boston
| Scope | What it involves |
|---|---|
| Fixtures swapped in place | Demo, rough-in, final inspection |
| Fixtures moved or shower enlarged | Adds a rough plumbing test before walls close |
| Gut remodel with structural change | Adds plan review, framing inspection and final inspections for each trade |
On site, the work follows a set order: demolition to the studs, framing repairs and grab bar blocking, rough plumbing, electrical and fan, backer board and waterproofing with the pan flood test, then tile, fixtures, glass and the final inspection. Glass is measured after the tile is done. In Cambridge, a building inspector cannot approve the contractor's next step until the electrical or plumbing inspector has signed off on the utility work, so the trades have to be sequenced rather than stacked. If this is the only bathroom in the house, agree with the remodeler on how you will have a working toilet each night.
How to check a bathroom remodeler before you hire
Massachusetts regulates remodelers through two separate systems that do not overlap.
| Credential | Who holds it | What it covers |
|---|---|---|
| Home Improvement Contractor (HIC) registration | Remodelers working on existing owner-occupied homes of 1 to 4 units | The contract, the work and access to the Guaranty Fund |
| Construction Supervisor License (CSL) | The person supervising construction | Required to pull permits in many towns |
| Master or journeyman plumber | Licensed by the Board of State Examiners of Plumbers and Gas Fitters | All plumbing work and the plumbing permit |
| Master or journeyman electrician | Licensed by the Board of State Examiners of Electricians | All electrical work and the electrical permit |
The HIC program is run by the Office of Consumer Affairs and Business Regulation. Registration costs $150 and must be renewed every two years. Eligible homeowners can receive up to $25,000 from the Guaranty Fund for unpaid judgments against a registered contractor, and the program runs an arbitration process for disputes.
- Look up the HIC registration and the CSL on the state's eLIPSE platform. You can search by license number, name, license type or business.
- Confirm the plumber and electrician hold master or journeyman licenses with the same lookup.
- Ask how they build the shower pan, which waterproofing system they use, and whether they flood-test before tile.
- Ask who pulls the permit and whether the bid covers lead-safe work if the house is old enough to carry lead paint.
- Keep payments tied to milestones. Our guide to paying a contractor covers how to structure them.
A handyman without HIC registration cannot legally take on a bathroom remodel in an owner-occupied home of four units or less. For plumbing problems outside a remodel, see our Boston plumbing guide.
Areas we cover
GOLDGCP bathroom remodelers work across Greater Boston, including:
- Boston and its neighborhoods
- Cambridge and Somerville
- Newton and Brookline
- Quincy
- The North Shore
- The South Shore
Enter your ZIP code below to see bathroom prices and the remodelers who cover your area.
How GOLDGCP works
- Describe the bathroom through the form, a call or WhatsApp: its size, what you want to change and whether the toilet or shower moves.
- We match you with up to 3 vetted, licensed remodelers in your area, and you see ZIP-based prices before anyone visits.
- Each remodeler has passed license, insurance, background and reference checks, a portfolio review and onboarding.
- Your remodeler pulls the permit and books the inspections.
- You pay in milestones, each one after you approve that stage, and follow the job in the client portal.
Frequently asked questions
How much does a bathroom remodel cost in Boston?
By our cost-adjusted figures, a mid-range full bathroom costs about $11,050 to $34,450, a powder room $4,900 to $17,200 and a primary bath $24,600 to $73,800. A cosmetic refresh runs $6,650 to $20,650. Moving drains, especially on a slab, pushes costs higher.
Do I need a permit to remodel a bathroom in Boston?
Yes, if you replace or move a toilet, tub, shower valve or sink, add a circuit or install a fan. Boston ISD issues short form building permits and separate plumbing, gas and electrical permits. Paint, accessories and floor tile alone need no permit. A moved wall or recessed floor needs plan review.
What does a Boston inspector check in a new shower?
A waterproof pan flood-tested before tile, a waterproof backer behind the tile, an anti-scald valve, tempered or laminated safety glass, a door that swings out with a clear opening, and an exhaust fan ducted outside, never into the attic or a wall cavity.
How much does it cost to move a toilet in a Boston bathroom?
Most Boston-area houses are wood-framed on a basement or crawl space, so a plumber can often reach a new drain line from below. Postwar ranches on a slab need the floor cut and trenched, which costs much more. Ask your remodeler which structure you have before signing.
Do I have to check a remodeler's license in Massachusetts?
Yes. Remodelers working on existing owner-occupied homes of one to four units must hold Home Improvement Contractor registration, which is separate from a Construction Supervisor License. Plumbers and electricians must hold master or journeyman licenses. Look both up on the state's eLIPSE platform before you sign.
Can I get a curbless shower in an older Boston house?
Usually, but recessing the floor framing for a zero-threshold entry is structural work, so it needs plan review rather than a simple alteration permit. Add grab bar blocking while the walls are open. Decide before the drawings are finished, not after demolition.
Is a bathroom remodel worth it in Boston?
Bathrooms hold their value in a tight housing market, and a remodel that keeps the layout and drains in place costs far less than one that moves them. The biggest risk in a triple-decker is a shower that leaks into the unit below, so spend on waterproofing and ventilation before tile.
How we calculate these prices
GOLDGCP starts from national price ranges for each job, taken from published 2026 cost guides and checked against local price guides where they exist. To get a local price, we multiply the national range by the construction cost factor for the metro from the U.S. Army Corps of Engineers Area Cost Factors (US average = 1.00). Where that table has no entry for a metro, we use the nearest listed location or the state value. For ZIP codes outside the 50 largest metros, the cost estimator uses the state's price level from the Bureau of Economic Analysis Regional Price Parities. Ranges include labor and standard materials but not unusual site conditions, so a written quote after an inspection is always the final price.
Sources
About this guide
Written by the GOLDGCP editorial team. Prices come from national cost guides adjusted with official construction cost factors for Boston; rules and statistics come from the agencies and reports linked in the text. We update this page when prices or codes change.