Bathroom Remodel Permit in Franklin, WI (2026)

Research by DoINeedAPermit Research Team · Updated May 2026

The Short Answer

A full bathroom remodel in Franklin requires a permit if you're relocating plumbing fixtures, adding electrical circuits, installing a new exhaust fan, converting a tub to shower, or moving walls. Surface-only work—tile, vanity swap, faucet replacement in place—is exempt.

Franklin enforces Wisconsin's adoption of the 2015 International Residential Code, and the City of Franklin Building Department requires permits for any bathroom work that touches plumbing location, electrical capacity, or waterproofing assemblies. What sets Franklin apart from some neighboring towns is its strict enforcement of ICC/IPC drainage and venting rules specific to Wisconsin's 48-inch frost depth and glacial-till soil conditions—especially trap-arm length on relocated drains (IRC P2706 caps this at 18 inches in most cases, but Franklin inspectors verify pitch and configuration against local subsurface conditions). Franklin also mandates GFCI/AFCI certification on all bathroom circuits per NEC 210.8, and exhaust-fan ducting must terminate outside per IRC M1505, not into attics. The online permit portal and plan-review process typically take 2–4 weeks for a full remodel. If your project is surface-only (new tile, faucet, vanity in existing locations), no permit is needed—file nothing and proceed. If fixtures move or electrical/plumbing systems change, file with the Franklin Building Department and budget $300–$700 in permit fees plus plan-review time.

What happens if you skip the permit (and you needed one)

Stop-work order and $250–$750 fine from Franklin Building Department, plus you'll be forced to pull the permit retroactively and pay double fees ($600–$1,400 total).
Insurance claim denial if water damage or electrical fire occurs—your homeowner's policy may refuse payout because work was unpermitted.
When you sell, Wisconsin's Residential Real Property Condition Disclosure (RPCD) requires you to disclose unpermitted work, which kills buyer confidence and can tank your sale price by $5,000–$15,000 or derail the deal entirely.
Lender or appraiser rejection during refinance—many banks won't lend on homes with unpermitted bathroom remodels because it affects property value and resale legality.

Franklin bathroom remodel permits—the key details

Franklin, like all Wisconsin municipalities, requires a permit whenever you relocate a fixture, add a new circuit, install a new exhaust fan, or alter drainage and venting. The rule originates in Wisconsin's adoption of the 2015 IRC (with state amendments), and Franklin Building Department enforces it strictly because bathrooms are high-risk zones for water intrusion and electrical hazard. If you're only replacing a toilet, faucet, or vanity in its existing location, or re-tiling without touching the substrate or waterproofing, you don't need a permit. But the moment you move a sink, toilet, or tub to a new location, you've crossed into permit territory. Relocated fixtures require new drain runs, trap arms, and venting—all of which must comply with IRC P2706 and P2907. The permit application asks for a detailed floor plan showing old and new locations, fixture types, trap configurations, and vent routing. Most homeowners don't have these drawings, so working with a plumber or designer early pays off in faster approval.

Electrical work in bathrooms is heavily regulated because moisture and electricity are a deadly mix. IRC E3902 and NEC 210.8 require GFCI (ground-fault circuit interrupter) protection on all bathroom circuits—not just countertop outlets, but also lighting, exhaust fans, and any appliance outlet. If you're adding a heated towel rack, bidet toilet, or any new load, you likely need a dedicated circuit. Franklin inspectors require a signed electrical plan showing all circuits, breaker sizes, and GFCI locations before rough-in inspection. AFCI (arc-fault circuit interrupter) protection is also required for bedroom circuits and is increasingly expected for bathroom lighting circuits as well. If your existing panel has no spare breakers, you may need a sub-panel or panel upgrade—a $1,500–$3,000 add-on that homeowners often discover too late. The electrical rough-in inspection happens before drywall, so plan for inspectors to verify all wire gauges, junction boxes, and device locations.

Exhaust ventilation is non-negotiable in Wisconsin bathrooms. IRC M1505 requires mechanical exhaust for all bathrooms and requires ducting to terminate outdoors, not into the attic (a common DIY error that causes mold and energy loss). Franklin Building Department specifies 6-inch ductwork, sealed seams, and a damper or flapper to prevent back-drafting. If you're installing a new fan or replacing an old one with a higher CFM (cubic feet per minute) rating, you need a permit and a plan showing the duct route, termination location, and damper type. The rough mechanical inspection checks ductwork for kinks, improper slope, and outdoor termination before drywall goes up. If your exhaust duct terminates in a soffit or eave rather than through the roof or gable wall, the inspector will flag it and require rerouting—so verify the roof penetration location with the inspector early.

Shower and tub waterproofing is where many homeowners get tripped up and where Franklin inspectors are vigilant. Converting a tub to a shower changes the waterproofing requirement because showers have higher water-exposure risk. IRC R702.4.2 mandates a continuous, impermeable water-resistant barrier behind all shower walls, typically a cement board with a liquid-applied membrane (like RedGard) or a pre-fabricated waterproofing system. If you're gutting the walls around the shower, the inspector needs to see the waterproofing system specified on your permit plan—brand, application method, and sealing detail at penetrations. Many permits are delayed because the applicant doesn't specify the waterproofing system upfront, forcing a rework of the plan. Franklin also requires pressure-balanced or thermostatic mixing valves on all new or relocated shower valves per the Plumbing Code—this prevents scalding and is inspected during the rough-plumbing stage. Budget an extra 1–2 weeks for plan review if your permit includes a tub-to-shower conversion.

Timeline and cost in Franklin are moderate compared to larger Wisconsin cities. A basic bathroom remodel permit runs $300–$700 depending on the project valuation (typically 1.5–2% of the estimated remodel cost). A $15,000 full remodel might cost $225–$300 in permit fees alone. Plan review takes 5–10 business days, and inspections happen at rough plumbing, rough electrical, framing, and final stages—each inspection must be scheduled and typically takes 1–2 days for the inspector to arrive and sign off. If the inspector finds violations (e.g., trap arm too long, no GFCI shown, ductwork kinked), you'll get a correction notice and need to fix and re-inspect, adding 3–7 days. Final inspection is the green light to close walls and finish. Most full remodels take 3–5 weeks from permit filing to final approval, not counting construction time. If you hire a licensed plumber and electrician, they often know the local inspector's quirks and can expedite the process. Owner-builders are allowed in Franklin (for owner-occupied homes), but you'll be held to the same code standard as a licensed contractor.

Three Franklin bathroom remodel (full) scenarios

Scenario A

Vanity and faucet swap in place, new tile, no fixture movement—south Franklin ranch

You're replacing an old vanity with a new one in the same footprint, swapping out the faucet (same rough-in), re-tiling the walls with cement board that's already there, and not moving the toilet or tub. This is surface-only work: no permit needed. The old vanity's drain and hot/cold lines stay in the same location; the new faucet bolts into the existing holes; the tile is purely cosmetic over the existing waterproofed substrate. You can pull the permit portal and file nothing—just buy materials, hire a handyperson or do it yourself, and proceed. However, if you discover that the existing drain is corroded or the rough-in is a non-standard size (e.g., 6-inch centers instead of 4-inch), you'll need to relocate the drain line, which flips you into permit territory. Some older Franklin homes have pedestal sinks with no vanity cabinet; if you're adding a cabinet vanity with a drain in a new location, that's a permit. Cost for the swap itself runs $1,500–$3,500 materials and labor, zero permit fees.

Scenario B

Relocating toilet 3 feet to opposite wall, new drain run, new vent stack—downtown Franklin colonial

You're moving the toilet from the north wall to the south wall—a classic remodel goal to improve layout. This is a permit-required project because the toilet drain is being relocated, which means a new 3-inch PVC line with a new trap and vent route. The existing 3-inch drain that served the old toilet location stays capped; you're running 20 feet of new PVC under the floor (in a 48-inch frost zone, so it must be below grade and sloped 1/4-inch per foot per IRC P3005). You'll also need a new vent stack or a tie-in to the existing vent that maintains proper distance from windows and doors per IPC 504. The plan requires a floor plan showing old and new toilet locations, trap-arm length (maximum 18 inches in Franklin's typical setup), vent routing, and slope confirmation. Plumbing rough-in inspection happens after you've run the lines but before closing walls—the inspector verifies slope, trap-arm length, vent clearance, and trap seal. If the trap arm exceeds 18 inches or slopes too flat (less than 1/4-inch per foot), the inspector will reject it. Budget 2–3 weeks for plan review and rough inspection. The permit costs $400–$600. Plumbing labor runs $2,000–$4,000 for the drain run, new vent, and rough-in. Total project scope: $8,000–$15,000 with finishes.

Scenario C

Tub-to-shower conversion, new waterproofing, relocated mixing valve, added exhaust circuit—west Franklin ranch with 1970s plumbing

You're gutting the bathroom, removing the old cast-iron tub, and installing a tile shower in its place. The plumbing rough-in for the shower is slightly different from the tub (tub spout location vs. shower head location), and you're installing a new pressure-balanced mixing valve to prevent scalding (code-required for new shower installations). The exhaust fan is also being replaced with a larger model (100 CFM vs. the old 50 CFM), which means a new 6-inch duct run and a circuit upgrade from the existing 15-amp lighting circuit to a dedicated 20-amp circuit. This is a multi-trade permit: plumbing, electrical, and potentially structural (if you're moving walls). The waterproofing system must be specified on the permit plan—you'll choose between cement board + liquid membrane (RedGard), a prefab PVC panel, or tile backer board with a polymer matrix. Most Franklin inspectors require a detailed product spec and installation notes. The plan-review process is longer because it involves multiple inspections: rough plumbing (drain, vent, valve location), rough electrical (new circuit for exhaust and GFCI outlets), and potentially a framing inspection if walls are moved. The tub-to-shower conversion also triggers waterproofing inspection before tile—the inspector verifies the membrane is continuous and sealed at all penetrations. Budget 3–4 weeks for plan review and inspections. Permit costs $500–$800. Plumbing and electrical labor combined runs $3,000–$5,000. Total project cost: $12,000–$25,000 depending on finishes and tile choice. This is the most common full-remodel scenario.

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Wisconsin frost depth and drain slope: why it matters in Franklin

Franklin sits in climate zone 6A with a 48-inch frost depth—the ground freezes that deep every winter. This matters for bathroom drains because any drain line that runs under the house must be below the frost line or it will heave and crack. IRC P3005 requires all drainage below the frost line to slope 1/4-inch per foot minimum toward the main stack or septic. If you're relocating a toilet drain and the existing drain is shallow (say, 12 inches below the basement floor), you can't just reuse that slope; you have to either go deeper or tie into a drain that's already below 48 inches. Franklin inspectors will ask for the depth of the new drain line on your plan and will verify slope in the field during rough-in. Many homeowners and even some contractors miss this detail and run drains at improper slope, leading to clogs and backup. If your home has a crawlspace rather than a basement, the frost-line requirement is less strict, but the inspector will still verify that any exposed drain line is sloped correctly and protected from freezing.

The glacial-till soil composition under Franklin also affects drainage. Parts of Franklin have clay pockets that don't drain well, which means foundation drains and sump pumps are common. If you're adding a new drain line (e.g., for a relocated toilet), the inspector may ask whether the route avoids clay layers or existing footing drains. A 3-inch PVC drain can cross a sump pump line if it's sleeved, but the inspector must approve the routing. Budget an extra conversation with your plumber about soil conditions and frost depth; it's not a deal-breaker, but it does affect the drain route and sometimes adds cost if you need to go deeper or around obstacles.

If you're in a part of Franklin with very poor drainage, the city may also require a sump pump or interior drain system, though this is rare for bathroom remodels unless you're in a known wet basement area. The Building Department can advise during the pre-permit consultation.

GFCI and AFCI requirements in Franklin bathrooms: the electrical gotcha

Every bathroom outlet, lighting fixture, and appliance in Franklin must be GFCI-protected per NEC 210.8. This is non-negotiable and is the number-one reason for electrical permit rejections. If you're adding a heated towel rack, exhaust fan with a heater, or bidet toilet, each one is a separate load and likely needs its own circuit or a dedicated bathroom circuit with GFCI. Many older Franklin homes have one 15-amp bathroom circuit serving everything—lights, outlets, exhaust—and if you add a 1,500-watt heater, you'll overload it and trip the breaker constantly. The solution is a new dedicated 20-amp circuit just for the heater, which requires a new breaker and a run from the panel. The plan must show all circuits, breaker amperage, and GFCI protection locations. A common mistake is showing a GFCI outlet protecting downstream outlets (which is code-compliant), but the inspector will verify that the GFCI device is listed and properly wired.

AFCI (arc-fault circuit interrupter) protection is required for bedroom circuits in the 2015 IRC and is increasingly expected for bathroom lighting circuits as well. Franklin Building Department may request it on bathroom lighting even though it's not technically mandated in the 2015 code yet. If your bathroom is adjacent to or combined with a bedroom (e.g., an ensuite), the lighting circuit for the bedroom half may need AFCI. Dual-function GFCI/AFCI devices exist and are code-compliant, so ask your electrician about them during planning.

The electrical rough-in inspection happens before drywall. The inspector checks wire gauges (14-gauge for 15-amp, 12-gauge for 20-amp), junction box fill, outlet spacing, and GFCI device placement. If the ductwork for the exhaust fan or any plumbing penetrates an electrical box or crosses a wire path, the inspector will flag it and require rerouting. Coordinate your plumber and electrician early so they don't conflict during rough-in. Many Franklin contractors schedule plumbing rough-in first, then electrical, to avoid clashes.

City of Franklin Building Department
Franklin City Hall, Franklin, WI (verify exact address locally)
Phone: (262) 455-1234 or check franklinwi.us for current number | https://www.franklinwi.us or contact Building Department for online permit portal access
Monday–Friday, 8:00 AM–5:00 PM (verify locally as hours may vary)

Common questions

Do I need a permit to replace my bathroom faucet?

No, if the faucet is a like-for-like replacement in the same location with the same rough-in (e.g., 4-inch centers for a single-hole faucet). You just turn off the water, unscrew the old faucet, and install the new one. If you're changing the rough-in center distance (e.g., from single-hole to widespread), you may need to relocate supply lines, which requires a permit. When in doubt, ask the Building Department if the rough-in change is significant.

Can I pull a bathroom permit as an owner-builder in Franklin?

Yes, Franklin allows owner-builders for owner-occupied homes. You must pull the permit yourself, pay the fees, and be present for all inspections. The code standards are identical to those for licensed contractors, so the inspector will enforce IRC and Wisconsin Plumbing Code requirements just as strictly. If you hire subcontractors (plumber, electrician), they must be licensed, and the work must still pass inspection. Many owner-builders find it easier to hire licensed trades and avoid the permit headache; the cost difference is often minimal once you factor in permit delays and re-inspections.

What's the cost of a bathroom remodel permit in Franklin?

Permit fees are typically 1.5–2% of the project valuation. A $15,000 remodel runs $225–$300; a $20,000 remodel runs $300–$400. The city will ask you to declare the project cost on the permit application, and they'll calculate the fee based on that. If you undervalue the project, the inspector may adjust the fee upward. Plan an additional $200–$500 for plan review if revisions are needed.

How long does plan review take for a bathroom remodel in Franklin?

Standard plan review takes 5–10 business days. If the plan is incomplete (e.g., waterproofing system not specified, electrical circuits not shown, or drainage slope not confirmed), the Building Department will issue a list of corrections and you'll resubmit. Corrections typically take another 3–5 business days. Complex projects (tub-to-shower conversion, major electrical upgrades) may take 2–3 weeks. Submitting a complete plan with all required information upfront minimizes delays.

What inspections are required for a bathroom remodel in Franklin?

For a full remodel with plumbing and electrical work: rough plumbing (drains, supply lines, trap and vent routing), rough electrical (circuits, outlets, GFCI locations, breaker sizes), and final inspection (all work complete, surfaces closed, fixtures installed). If you're moving walls, a framing inspection may also be required. If you're just replacing fixtures in place, no inspections are needed because there's no permit. Each inspection must be scheduled in advance; the Building Department typically accommodates within 1–2 business days.

I'm converting my tub to a shower. Do I really need a waterproofing plan?

Yes. IRC R702.4.2 requires a continuous, impermeable water-resistant barrier behind all shower walls. The most common systems are cement board + liquid membrane (RedGard, Hydro Ban), prefab PVC or acrylic panels, or tile backer board with polymer matrix. You must specify the system on your permit plan with product brand and installation notes. The inspector will verify the waterproofing is continuous and sealed at all penetrations (shower valve, drain, etc.) before drywall or final tile is installed. Skipping this step or using inadequate waterproofing is a code violation and a recipe for mold and water damage later.

Can I vent my new exhaust fan into the attic instead of outside?

No. IRC M1505 requires all bathroom exhaust ducts to terminate outdoors, not in the attic. Venting to the attic causes moisture accumulation, mold, and energy loss. The duct must be 6 inches in diameter, sealed at the seams, and equipped with a damper or flapper to prevent back-drafting. The termination must be on the roof, gable wall, or soffit with a vent cap and grille. If you're in a cold climate like Franklin (zone 6A), the duct should also be insulated to prevent condensation inside the duct. The inspector will verify the duct route and outdoor termination during rough-in.

What's a pressure-balanced mixing valve and why do I need it?

A pressure-balanced mixing valve (or thermostatic valve) maintains constant water temperature by balancing hot and cold water pressure. If someone flushes a toilet and cold water pressure drops, a standard shower valve will spike hot water and scald the bather. A pressure-balanced valve detects the pressure drop and reduces hot water flow to maintain the target temperature. Wisconsin Plumbing Code (and IRC) require pressure-balanced or thermostatic mixing valves on all new or relocated shower valves. The rough-in location for the valve is critical and must be shown on the permit plan. The inspector will verify the valve is installed correctly and operates smoothly during rough-in.

I have a pre-1978 home and I'm remodeling my bathroom. Do I need to worry about lead paint?

Yes. If your home was built before 1978, federal law requires that any disturbed lead paint be handled by an EPA-certified lead-safe contractor or that you use containment and clearance methods. Franklin Building Department does not issue separate lead permits, but the lead-safe practices must be part of your remodel. If you hire a contractor, they must be certified lead-safe or you must hire a separate lead-abatement firm to test and contain/remove lead paint before the remodel begins. The cost adds $500–$2,000 depending on the scope of lead disruption. Most bathroom remodels involve some lead paint disturbance (removing old tile, vanity, trim), so budget for lead-safe work upfront.

Do I need to disclose unpermitted bathroom work when I sell my home in Wisconsin?

Yes. Wisconsin's Residential Real Property Condition Disclosure (RPCD) form requires you to disclose any unpermitted work, including bathroom remodels. If you fail to disclose, the buyer can sue for damages or rescind the sale. Unpermitted work also affects the home's appraised value and can tank a sale price by $5,000–$15,000 or kill financing entirely because lenders often won't lend on homes with unpermitted work. If you've already done unpermitted bathroom work, you can pull a permit retroactively and have the work inspected, though you may face double permit fees or a retroactive inspection fee. It's always cheaper and safer to permit upfront.

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 Franklin Building Department before starting your project.

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