Their team gutted our 1970s hall bath and turned it into a spa. Zero-threshold shower, Schluter waterproofing, linear drain, perfect tile lines. They hit the schedule and stayed on budget.
Jennifer M.
Massachusetts · Full Remodel
Full gut to final walkthrough
Full Bathroom Remodel in Massachusetts
Down-to-the-studs bathroom renovation for Shrewsbury and the surrounding towns. New plumbing, new layout, Schluter waterproofing, firm quote, one dedicated crew.
Licensed in Massachusetts Lifetime workmanship warranty 5.0★ / 24 reviews Mon–Fri 7–6, Sat 8–2
Get Your Free Bathroom Estimate
On-site quote, firm number, no high-pressure sales. Response within 1 business day.
Licensed & Insured
Massachusetts HIC #211749
Lifetime Warranty
On our workmanship
5.0 / 5.0
24 homeowner reviews
520+ Projects
Since 2014
A proper full remodel
Gut it properly. Build it once. Walk away clean.
A full bathroom remodel isn't a cosmetic refresh. It's a demolition, a new plumbing rough-in, new framing as needed, waterproofing, tile, fixtures, and trim — all sequenced so the finish work actually lasts. Done right on a Massachusetts hall bath, a full remodel takes 3–4 weeks and outlives its installers.
Most Massachusetts bathrooms we remodel were built in the 1950s–1990s. Cast iron drains, galvanized supply lines, cement-board-behind-tile with no real waterproofing. We strip all of that out, replace drain stacks with PVC, supply with PEX, waterproof with Schluter Kerdi or Kerdi-Board, and rebuild the room from the subfloor up.
We don't pack three projects and run between them. One Commonwealth Bath crew lives in your house from demo day to final walkthrough. Your project manager texts photo updates every evening. Firm number in the contract — no change-order theater.
See all of our Massachusetts bathroom renovation services — from full gut remodels to accessible baths, tub-to-shower conversions and master suite builds — for homeowners in Shrewsbury and the surrounding Central Massachusetts towns.
What's included
Every bathroom remodel project includes:
- On-site measurement and design consultation
- Town permit pulled and managed
- Full demo, debris haul-off, dust containment
- New PVC drain stack + PEX supply lines
- Schluter Kerdi or Kerdi-Board waterproofing
- Schluter Ditra underlayment on floor
- Subfloor/joist reinforcement as needed
- New venting, GFCI outlets, bath fan
Our Process
How the project actually runs.
No mystery. No surprise delays. Here's the exact sequence.
01
On-site walk
A project manager walks your bathroom, measures, reviews layout options, talks scope and tile preferences.
02
Firm quote
Itemized, firm, 48-hour turnaround. Every line item, every material brand, every labor cost spelled out.
03
Build week
Permit pulled, demo day scheduled, one crew moves in. Daily photo updates. Floor protection every day.
04
Final walk
Inspection signed off, punch list completed, grout sealed, caulk cured. We don't leave until the last tile is perfect.
Materials We Trust
The brands and systems we spec.
We only install systems we can stand behind for twenty years. No brand bait-and-switch mid-job.
Schluter-Systems Kerdi / Kerdi-Board
Sheet-membrane waterproofing for walls and pan. Industry-standard life-of-bathroom waterproof layer.
Schluter Ditra
Uncoupling membrane under every tile floor. Stops subfloor movement from cracking grout or tile.
Kohler, TOTO, Delta, Moen
Fixtures and valves with parts availability and solid warranty. No big-box mystery brands.
Porcelain tile: Daltile, Marazzi, Florida Tile
Large-format porcelain (12x24, 24x24, 24x48) plus mosaic accents. Samples on-site before the order.
PEX supply + PVC drain
Modern plumbing that won't scale or corrode like 60-year-old galvanized. Permit-friendly with MA code.
Quartz counters: Cambria, Caesarstone, MSI Q
Non-porous, no sealing, built for moisture. Undermount sinks installed with proper silicone gaskets.
Worth knowing first
Things most contractors won't tell you.
Your joist bay matters
Heavy tile floors (big-format porcelain, especially stone) need a subfloor stiffer than code. We check deflection on day one and sister joists before tile goes down if needed. Skipping this step is why tile floors crack two winters later.
Waterproofing is not caulk
Caulk and grout fail within a few years. The waterproof layer under the tile is what actually keeps water out of your framing. We spec Schluter sheet membrane on every shower. No paint-on 'waterproofing', no mesh-tape-at-corners shortcuts.
Permits are worth pulling
For plumbing or electrical work in any Massachusetts town, a permit protects you — inspected work means clean disclosure when you sell, and known-good hidden infrastructure. We handle the paperwork.
Layout changes = big-time cost lever
Moving the toilet 8 inches means cutting into the subfloor and rerouting a 3-inch drain. We'll always tell you whether a layout change is worth the cost. Sometimes it is. Often it isn't.
What homeowners say
Reviews from bathroom remodel clients.
Small hall bath felt three times larger when they finished. Floating vanity, 12x24 large-format tile up the wall, frameless glass. Quoted three, they came in on the low end.
Daniel K.
Massachusetts · Full Remodel
Hall bath remodel done while we were away. Came back to a finished room and a spotless house. They texted daily updates with photos.
Marie B.
Shrewsbury, MA · Full Remodel
Questions
Most-asked about bathroom remodel.
Most Massachusetts hall baths take 3–4 weeks demo-to-walkthrough. Master baths with plumbing relocations or custom tile run 4–6 weeks. We dedicate one crew to your project.
Yes. Commonwealth Bath Co. pulls the permit, schedules inspections, and submits the drawings. Your only role is approving the scope.
Yes, unless it's your only bathroom. We install dust containment, protect floors, and keep utility shutoffs to predictable windows you can plan around.
Very common on 1950s–1970s Massachusetts baths. Our contract includes an allowance for hidden conditions. If we find framing rot or mold, we show you the photos, explain the fix, and document the added cost before doing the work.
Design and material selection is included with every full remodel. We walk your bathroom, review inspiration images, and settle the layout, tile selections and fixture spec with you before anything is ordered.
Yes. All plumbing and electrical work is done by Massachusetts-licensed plumbers and electricians under permit, and it is covered by our lifetime workmanship warranty.
It depends on scope far more than finishes. A hall bath full gut-and-rebuild — PVC drain, PEX supply, Schluter waterproofing, tile, vanity, toilet, fixtures — typically runs $28,000–$45,000. A master bath with a walk-in shower, double vanity and heated floor typically runs $30,000–$95,000 or more, and relocating the toilet or tub adds subfloor work and a drain reroute on top. See our pricing guide for the full ranges. We break every line item out in writing before you sign.
Yes — if your project involves moving any plumbing (toilet, drain, supply lines), upgrading electrical (GFCI, new circuit for a heated floor or exhaust fan), or structural work (enlarging the bathroom, moving a wall). Massachusetts requires a registered Home Improvement Contractor and a building permit for these scopes. Cosmetic work — replacing a vanity in place, swapping fixtures without moving pipes, installing new tile over existing backer — can often be done without a permit. We tell you exactly which category your project falls in at the estimate appointment. We pull all permits ourselves.
Porcelain tile is the top choice for Massachusetts bathrooms because it's completely non-porous and unaffected by the seasonal humidity swings we get from June through September. Large-format porcelain (12×24 or 24×24) is especially popular right now — fewer grout lines, easier to clean, and reads upscale. For floors we use a slip-rated porcelain or textured mosaic to meet code. Natural stone (marble, travertine) is beautiful but needs sealing every 1–3 years in a shower environment. We install it with proper penetrating sealer and give you a maintenance schedule if you go that route. The non-negotiable for any Massachusetts bathroom: a properly sized humidity-sensing exhaust fan. Timers shut off too early and leave moisture in the walls. We spec humidity sensors on every project.
Related services
Other bathroom projects we handle.
Ready when you are
Let's start your bathroom.
Free on-site estimate. Firm quote within 48 hours. No high pressure, ever.
520+
Projects Completed
5.0★
24 Homeowner Reviews
1 day
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Licensed & Insured Lifetime Warranty On-Time Finish
Get Your Free Bathroom Estimate
On-site quote, firm number, no high-pressure sales. Response within 1 business day.
Central Massachusetts
Full bathroom remodels, town by town
A full bathroom remodel in Massachusetts involves more than picking tile. Every town we work in has its own building department, permit fees and inspection schedule, and its own mix of housing that decides what we find behind the walls. We pull the permits and manage every inspection through final sign-off.
Shrewsbury
Housing: 1920s and '30s capes and colonials, postwar ranches and split-levels, and newer subdivisions.
Westborough
Housing: 19th-century homes in and around the historic districts, plus colonials, capes and split-levels from the decades after the highways arrived.
Northborough
Housing: older homes along Main Street and colonials, capes and ranches from the second half of the 20th century.
Southborough
Housing: antique homes in the villages and larger colonials on generous lots.
Grafton
Housing: historic homes around the Common, mill-era houses in the river villages, and newer colonials and capes.
North Grafton
Housing: older mill-era homes and newer colonials and capes.
South Grafton
Housing: mill-village houses and multi-families, plus capes and ranches further from the river.
Holden
Housing: capes, ranches and colonials from the postwar decades on, with older homes near the center.
Leominster
Housing: triple-deckers on French Hill, older multi-families near downtown and postwar neighborhoods further out.
Bathroom remodel permits in Massachusetts
Any bathroom remodel in Massachusetts that involves moving plumbing, adding electrical circuits (heated floors, new exhaust fan wiring), or structural changes requires permits from the town building department. Cosmetic-only work — swapping a vanity in place, new tile over existing backer — typically does not. We assess permit requirements at your free on-site estimate and pull all permits ourselves. You never have to deal with the building department.
Guest / hall bath
Vanity, toilet, tile and fixtures in the same footprint. No plumbing relocation.
Full gut, same footprint
Down to studs. New supply and waste, Schluter waterproofing, full tile, permits.
Master bath
Walk-in shower, double vanity, heated floor, and layout changes where they earn their keep.
Looking for a complete overview of what it takes to do a bathroom remodel in Massachusetts — including permit details, cost breakdowns by scope, and the towns we cover? Our homepage covers everything homeowners need to know before starting a renovation.