Research by DoINeedAPermit Research Team · Updated May 2026
The Short Answer
Most full bathroom remodels in Bridgewater Town require a building permit — but surface-only work (new tile, vanity replacement in place, fixture swap) does not. The dividing line is whether you relocate plumbing, add electrical circuits, or modify the waterproofing assembly.
Bridgewater Town's Building Department requires permits for any bathroom work that involves fixture relocation, new electrical circuits, exhaust fan changes, or tub-to-shower conversion — which covers most 'full' remodels. Uniquely, Bridgewater enforces Massachusetts State Building Code 780 CMR with particular rigor on waterproofing details for wet areas; the town's plan-review team routinely rejects shower-stall designs that don't specify the exact waterproofing membrane product or installation method upfront. Unlike some neighboring towns (e.g., Easton) that accept generic 'cement board plus waterproofing,' Bridgewater requires a stamped drawing or manufacturer spec sheet. Additionally, the town uses an in-person plan-review process at Town Hall rather than an online portal — you'll submit physical plans and walk them to the Building Department counter, not email PDFs. For pre-1978 homes (common in Bridgewater), lead-paint inspection and disclosure rules add another layer. Permit fees run $250–$650 depending on project valuation, plan-review takes 2–4 weeks, and you'll face 4–5 inspections (rough plumbing, rough electrical, framing/waterproofing, drywall, final). If your work is limited to in-place fixture swap or cosmetic tile, no permit is needed.
What happens if you skip the permit (and you needed one)
- Stop-work order: Bridgewater Building Inspector can issue a stop-work order within 48 hours of discovery, halting all work; violation fines start at $300 and can escalate to $1,500+ per day of non-compliance.
- Insurance denial: Your homeowner's policy will likely deny claims for unpermitted work; water damage from a bathroom remodel (common cause of claims) leaves you fully exposed — $50,000+ repair bills are not uncommon.
- Resale disclosure hit: Massachusetts real-estate law requires disclosure of unpermitted work; buyers' lenders often demand retroactive permits or estimates to bring work into compliance, costing $2,000–$8,000 in re-inspection and remediation fees.
- Forced removal or remediation: If the work is deemed unsafe (e.g., improper electrical GFCI wiring, substandard waterproofing leading to mold), the Inspector can require you to hire a licensed contractor to tear out and redo the work at full cost, often $15,000–$40,000 for a bathroom.
Bridgewater full bathroom remodels — the key details
Cost and timeline for a permitted full bathroom remodel in Bridgewater typically run 8–14 weeks from permit approval to final sign-off, plus 2–4 weeks for plan review. Permit fees are $250–$650 depending on the estimated project cost (permit valuation is typically 1–2% of the total bid); a $25,000 remodel might cost $350–$500 in permit fees alone. If you're hiring a licensed general contractor, they'll handle the permit pull and inspections; if you're owner-builder (allowed for owner-occupied homes in Bridgewater), you can pull the permit yourself, but you must be present for all inspections. Many homeowners underestimate the cost of waterproofing materials and labor; a proper shower waterproofing system (cement board, membrane, and skilled tiling) can run $3,000–$6,000 depending on shower size. Hiring a licensed plumber for drain relocation (if needed) adds $1,500–$3,000; electrical rough-in by a licensed electrician adds $800–$1,500. The permit fee is not the largest cost, but it's a marker that the work must meet code — and meeting code often costs more upfront than cutting corners.
Three Bridgewater Town bathroom remodel (full) scenarios
Scenario A
In-place fixture swap: toilet, sink, and vanity replaced in same locations, new faucet, tile cosmetic refresh (Bridgewater village home, 1960s ranch)
Your 1960s ranch has a small primary bathroom (5x7 feet) with the toilet in the corner, the sink on the back wall, and a tub/shower combo on the third wall. You want to tear out the old toilet, vanity, and fixtures and replace them with new equivalents in the same locations — a new low-flow toilet, a new 30-inch vanity with a new faucet, and a new combination tub/shower valve. You'll also retile the tub surround for cosmetic reasons, but you're not changing the tub or moving the drain. You're keeping all the supply lines and drains exactly where they are. In this scenario, no permit is required. This is considered cosmetic or maintenance work under Massachusetts code because you're not breaking existing drain or supply lines, not relocating fixtures, and not modifying the structural or mechanical systems. The in-place faucet and fixture swap, plus cosmetic tile, falls under the exemption for work that 'does not involve the movement of fixtures or the modification of the water supply or drainage systems.' However, if you're also planning to retile and you want to ensure the tub surround is waterproofed to modern code (cement board plus membrane), you can ask the Building Department for a voluntary pre-inspection consultation — this costs nothing and takes 15 minutes, and it protects you from liability. Cost is purely material and labor: fixtures ($1,200–$2,500), vanity ($600–$1,500), faucet ($200–$800), tile and labor ($2,000–$4,000). No permit fees.
No permit required (fixture swap only) | Voluntary pre-inspection consultation available | Lead-safe work practices if home pre-1978 | Total project $4,000–$9,000 | No permit fees | New valve pressure-balanced spec recommended
Scenario B
Toilet relocation and new exhaust fan: moving toilet to opposite wall, ductless exhaust fan replacement, no structural changes (Bridgewater colonial, 1970s)
Your 1970s colonial has a main-floor bathroom where the toilet sits along the front wall and you want to move it to the back wall to make room for a larger vanity. This requires breaking the 3-inch drain line and the supply line, running new lines through the wall cavity, and creating a new rough-in on the back wall. Additionally, the existing exhaust fan is ductless (venting into the attic — a code violation that Bridgewater's Building Inspector will flag immediately). You're replacing it with a properly ducted fan that runs up into the attic and then exits through the roof. Both the toilet relocation and the new exhaust duct require a permit. The permit must include a rough plumbing plan showing the new drain run, the trap location and arm length (maximum 5 feet per IRC P3005), and the new supply line routing; it must also include a ventilation plan showing the exhaust-fan model, the duct diameter (typically 4 inches for a residential bathroom), and the termination location (must be through the roof with a damper, not vented into the attic or soffit). Bridgewater's plan review will check that your trap arm doesn't exceed code length and that your duct run can support the CFM rating of the fan you've selected (typically 80–150 CFM for a bathroom). Rough plumbing inspection happens after the drain is roughed in but before walls close; rough electrical happens when the exhaust-fan electrical rough-in is done. Expect 2–3 weeks for plan review, then 4–6 weeks of construction before final inspection. Permit fee is approximately $350–$450 depending on project valuation. If you're also updating tile or fixtures in the bathroom, those cosmetic elements don't add to the permit cost, but they extend timeline and labor. Ductwork and exhaust-fan installation is best left to a licensed HVAC contractor ($1,200–$2,000); plumbing relocations require a licensed plumber ($2,000–$3,500).
Permit required (toilet relocation + exhaust duct) | Plumbing plan with trap arm calculation required | Exhaust-fan model and CFM rating must be specified | Duct termination through roof mandatory (no attic venting) | Rough plumbing and rough electrical inspections | Permit fee $350–$450 | Total project $8,000–$15,000
Scenario C
Tub-to-shower conversion with new electrical circuits: tear out tub, install walk-in shower, add heated floor and new light circuits, partial wall relocation (Bridgewater cape, pre-1978)
Your pre-1978 cape has a cramped main-floor bathroom with a vintage cast-iron tub and a small window on the tub wall. You want a complete gut: tear out the tub, install a 5x8 walk-in shower with a new drain pan, tile the walls with a waterproofed assembly, move the wall between the bathroom and the adjacent closet 2 feet to the left to gain shower space, add a heated floor mat under the new tile, and install two new light fixtures with GFCI protection. This is a high-complexity permit scenario. You need multiple permits: a building permit (for structural wall work and the waterproofing system), a plumbing permit (for the new shower drain and supply lines), and an electrical permit (for the heated floor, new lights, and GFCI circuits). The building permit plan must show the wall relocation with header sizing (if a load-bearing wall, you'll need a beam or a larger header, which may require a structural engineer's review — Bridgewater will not approve a load-bearing wall relocation without a PE stamp). The plumbing plan must show the new shower pan with proper slope, the drain line, the trap, and the supply rough-in for a pressure-balanced valve (required for safety in modern code; your old tub might have had a single-handle valve, but showers must be pressure-balanced per IRC P2704). The electrical plan must show the GFCI protection for the heated floor (it should be on a dedicated 20-amp circuit), the light fixtures with their clearance from the shower (minimum 7 feet 8 inches), and proper AFCI protection on the branch circuits if required by local amendment. The waterproofing assembly is critical: Bridgewater requires a detailed specification showing cement board, a waterproofing membrane (e.g., Schluter Kerdi or Redgard), the tile, and grout. You'll also need to address lead-paint hazards: a pre-1978 bathroom tear-out triggers lead-safe work practice requirements (containment, HEPA vacuum, wet cleaning). Plan review for a multi-permit project like this can take 4–6 weeks because the Building Department, Plumbing Inspector, and Electrical Inspector all review separately. You'll face 5–6 inspections: structural (wall relocation), rough plumbing, rough electrical, framing/waterproofing, drywall, and final. Permit fees total approximately $600–$850 (building $300–$400, plumbing $150–$250, electrical $150–$200). Timeline is 10–16 weeks from permit approval to final. Costs are substantial: wall relocation with a header can run $2,000–$4,000; new shower pan and waterproofing $3,500–$6,000; electrical rough-in $1,200–$2,000; heated floor mat and installation $1,500–$2,500. Hiring licensed contractors for all trades is strongly recommended here — the complexity is high and code violations are easy to miss.
Permit required (structural wall + plumbing + electrical) | Structural engineer stamp needed if load-bearing wall | Waterproofing assembly specification with product names required | Pressure-balanced shower valve mandatory | GFCI and AFCI circuits for heated floor and lights | Lead-safe work practices (pre-1978 home) | 5-6 inspections, 10-16 week timeline | Permit fees $600–$850 | Total project $15,000–$35,000
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Waterproofing requirements in Bridgewater: the biggest surprise in full bathroom remodels
Cost for waterproofing materials and labor is often underestimated. A typical shower wall waterproofing job (cement board, membrane, skilled installation) costs $3,000–$6,000 for a 5x8 shower. If you're also waterproofing a floor (heated floor or floor-level tile), add $1,500–$2,500. Many homeowners try to save money by doing partial waterproofing (e.g., only the walls, not the floor-to-wall junction) — this is a code violation and Bridgewater's Inspector will catch it at rough inspection. It's cheaper to do it right the first time than to tear out and redo it. Additionally, if you're using a product like Schluter (which is thicker and more durable than paint-on membranes), the tile installation is more complex because the membrane has flanges and transitions that must be carefully finished. Hiring a tile specialist familiar with your chosen system is worth the extra cost.
Electrical and GFCI/AFCI requirements in Bridgewater bathrooms
Light fixtures in bathrooms must be rated for wet or damp locations and must be a safe distance from the tub or shower. IRC E4003.9 requires that light fixtures be a minimum of 5 feet horizontally from the edge of the tub or shower, or 7 feet 8 inches measured vertically if above the tub/shower. This is a safety rule to prevent electrocution. If you're adding a new vanity light centered over the sink, and the sink is 3 feet from the tub edge, the light fixture itself must be 5 feet horizontally from the tub. Many bathroom floor plans don't allow this, so you need to plan light placement carefully before you submit for permit. Exhaust fans also have electrical requirements: they must be on their own circuit or shared only with a light fixture in the same bathroom (per code), and the circuit must be separate from general-purpose outlets. If your exhaust fan is 200 CFM or higher, it may require a dedicated 20-amp circuit. The Electrical Inspector will verify this during rough inspection.
Bridgewater Town Building Department
Bridgewater Town Hall, 10 School Street, Bridgewater, MA 02324
Phone: (508) 697-0904
Monday–Friday, 8:00 AM–5:00 PM (verify hours locally; some town offices have reduced hours)
Common questions
Do I need a permit to replace a toilet in place?
No, if you're replacing an existing toilet with a new one in the same location, no permit is required. You're disconnecting and reconnecting supply and waste lines, but you're not modifying the drainage system or moving fixtures. However, if you're relocating the toilet to a different wall or corner, you need a permit because you're running new drain and supply lines. Also, if your home was built before 1978 and the old toilet removal creates lead dust, you must follow EPA lead-safe practices.
What does 'moving fixtures' mean for permit purposes?
Moving a fixture means relocating the physical location of a toilet, sink, tub, or shower. If your toilet is in the corner and you want it on the opposite wall, that's moving it — you need a permit. If you're replacing an old toilet with a new one in the same corner, that's not moving it. The key is whether new drain or supply lines need to be run. Even moving a fixture just a few feet within the same wall requires a permit if it means new lines.
Does Bridgewater require a permit for exhaust fan replacement if the ductwork stays the same?
If you're replacing an old exhaust fan with a new one and the duct route doesn't change, you may not need a permit — check with Bridgewater's Building Department first. However, if the old fan is ductless (venting into the attic), replacing it with a properly ducted fan requires a permit because you're adding a new duct that runs to the exterior. Ductless fans are a code violation in Massachusetts, and Bridgewater's Inspector will likely flag this issue if they discover it during any permit review. It's better to pull a permit and do the duct work right than to have a violation on record when you sell the home.
I'm converting my tub to a shower. Do I need a permit?
Yes, tub-to-shower conversions require a permit in Bridgewater. The conversion changes the waterproofing assembly (the tub has a built-in pan, the shower requires a new pan or waterproofed floor), and it requires new drain routing and supply rough-in. The permit must include a detailed waterproofing specification (cement board plus membrane) and the drain-pan design. Expect 3–4 weeks for plan review and a permit fee of $300–$500.
Disclaimer: This guide is based on research conducted in May 2026 using publicly available sources. Always verify current bathroom remodel (full) permit requirements with the City of Bridgewater Town Building Department before starting your project.
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