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Bathroom Remodeling in Wisconsin

In Wisconsin, we plan bathroom remodeling projects in Madison and Milwaukee. A bathroom remodel replaces fixtures and finishes and fixes what sits behind them: plumbing, waterproofing, subfloor and ventilation. It can be an update in the same footprint, a tub-to-shower conversion, or a full gut with a new layout. Because a bathroom handles water every day, the work you cannot see matters as much as the tile. It is worth doing when fixtures leak or fail, grout and caulk keep breaking down, the room is hard to use, or someone in the home needs safer access.
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Finished lake-home bathroom in northern Wisconsin with a white-pine ceiling, slate-grey tile shower, oak vanity and a window onto pines and birches.
Illustrative image

Wisconsin context

Planning bathroom remodeling in Wisconsin

  1. One dwelling code, local permit rules

    One- and two-family homes built since June 1, 1980 fall under the Wisconsin Uniform Dwelling Code (UDC), chapters SPS 320 to 325, which DSPS calls the statewide building code for these homes. Municipalities that enforce the UDC must adopt it in its entirety and may not add requirements within its scope without state approval. The UDC does not cover alterations to homes built before June 1, 1980, unless a municipality adopts it for them, and it does not cover repairs or maintenance. Municipalities may set their own permit rules by ordinance for that work.

  2. Commercial code moved to the 2021 ICC codes

    Buildings with three or more dwelling units and other commercial buildings fall under the Wisconsin Commercial Building Code (SPS 361 to 366), not the UDC. DSPS adopted the 2021 ICC codes effective September 1, 2025, and plans submitted on or after November 1, 2025 must comply. Plan review is done by DSPS or, for certain buildings, by a delegated local municipality.

  3. Frost depth, frozen ground and snow loads

    Footings and foundations, including those for stoops and landings, must sit below the frost penetration level or at least 48 inches below adjacent grade, whichever is deeper. Limited exceptions apply, such as a frost-protected shallow foundation designed to the ASCE 32 standard. Footings may not be placed on frozen material. Roofs must be built to carry minimum snow loads taken from the code's statewide zone map.

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Permits

Bathroom work that moves or adds plumbing, adds electrical circuits or fixtures, changes ventilation or alters walls commonly needs a permit and inspections. Replacing a vanity or toilet in the same location may not. Rules differ by jurisdiction, so the local building department confirms what is required for your project.

Contractor licensing

Wisconsin Department of Safety and Professional Services (DSPS)

With limited exceptions, anyone other than an owner who lives or will live in the home who applies for a Wisconsin uniform building permit on a one- or two-family dwelling must hold a DSPS Dwelling Contractor certification (or a restricted or financial-responsibility version) and must hold or employ a certified Dwelling Contractor Qualifier. Trades are credentialed separately. A business that installs, repairs or maintains electrical wiring needs a DSPS Electrical Contractor license, with limited exceptions, and must use licensed or registered electricians. The uniform building permit also names the Wisconsin master plumber responsible for the plumbing. Paid renovation in homes built before 1978 must also follow the DHS Lead-Safe Renovation Rule. Before signing, check any contractor's DSPS credentials in the state's LicensE license lookup.

Check a contractor’s status (opens the official Wisconsin site in a new tab)

Building permits

Permits in Wisconsin

The Wisconsin uniform building permit for a new one- or two-family home comes from the municipality that enforces the Uniform Dwelling Code, or from a state-registered UDC inspection agency where the state has jurisdiction, and a certified UDC inspector must review the application. For additions, alterations and repairs, permit applications are filed under local ordinances, so rules differ by place. Madison and Oshkosh list roofing and siding as work that needs a permit, and La Crosse issues permits for re-roofing and re-siding. Commercial projects follow the Wisconsin Commercial Building Code, with plan review by DSPS or a delegated municipality. The permits your address needs are confirmed during planning, before work is scheduled.

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What’s included

Bathroom Remodeling in Wisconsin: scope and options

  • Demolition down to studs and subfloor where the condition calls for it
  • Shower and tub installation, including tub-to-shower conversions
  • Waterproofing behind tile in showers and other wet areas
  • Floor, wall and shower tile installation
  • Vanity, sink, toilet and faucet installation
  • Exhaust fan installation or replacement, vented to the outdoors
  • Plumbing and electrical updates coordinated with licensed trades where required
  • Wall blocking for grab bars, plus lighting, mirrors and accessories

Common options

Tub, shower or both
Keep a tub for bathing, convert to a walk-in shower for easier access, or install a tub and shower combination.
Shower base
A prefabricated pan installs quickly and simply. A tiled base allows custom sizes and low or curbless entries but involves more steps.
Wall surfaces
Tile, solid-surface panels or acrylic surrounds. Panels have few grout lines to clean, while tile offers more design choice.
Vanity style
Freestanding, wall-hung or built-in, with one or two sinks, sized to the storage you need and the space around it.
Accessibility features
Grab bars, a handheld shower, a bench, lever handles and a comfort-height toilet can be installed now or planned with wall blocking for later.

What this service does not cover

  • Remediation of widespread mold, which is handled by remediation specialists
  • Asbestos or lead-based paint abatement, which is handled by certified specialists
  • Replacing main water or sewer lines outside the bathroom
  • Repairs to water damage in rooms below the bathroom, unless added to the scope in writing

Budget planning

What affects cost

  • Layout changes

    Moving the toilet, shower or drains means more plumbing and floor work than keeping fixtures in place.

  • Shower type

    Custom tiled showers with niches, benches or curbless entries take more labor than prefabricated units.

  • Tile selection

    Tile size, material, pattern and how much of the walls are covered all affect labor and materials.

  • Subfloor and framing condition

    Water-damaged subfloor or framing has to be repaired before new finishes can go in.

  • Ventilation

    Adding or rerouting an exhaust fan so it vents outdoors can require work through walls, ceilings or the attic.

  • Fixtures and glass

    Shower valve types, specialty fixtures and custom glass doors vary widely.

  • Access and staging

    Tight rooms, upper floors and homes with only one bathroom affect how the work is sequenced.

Scheduling

What affects the schedule

  • Whether this is the only bathroom in the home
  • Custom shower glass, which is measured after tile is complete
  • Special-order vanities, tile and fixtures
  • Inspection timing for plumbing and electrical rough-in
  • Drying and curing time for waterproofing, mortar and grout
  • Water damage found after demolition

How to prepare

  • If this is your only bathroom, arrange another place to shower during the key stages
  • Remove toiletries, towels, rugs and anything stored in the vanity
  • Choose tile, vanity and fixtures early so they arrive before demolition
  • Note any current leaks, ceiling stains in the room below, or soft spots in the floor
  • Think about future needs, such as grab bars or a step-free shower

Process

How Bathroom Remodeling Projects Work

  1. 1

    Consult

    We look at the room, check for signs of leaks and soft spots in the floor, and talk through who uses the bathroom and how. Storage and accessibility needs come up here.

  2. 2

    Plan

    We settle the layout, tub or shower, tile, fixtures and ventilation, and write down the scope. Fixtures and tile are selected and ordered before demolition so the room is not left open waiting on materials.

  3. 3

    Build

    Demolition, plumbing and electrical rough-in, and inspections come first. Waterproofing is installed and checked before tile covers it, followed by fixtures, glass and trim.

  4. 4

    Enjoy

    A final walkthrough covers how fixtures and the fan work and how to care for grout, stone and glass. Punch-list items are completed before closeout.

Service areas

Where we plan bathroom remodeling projects in Wisconsin

Availability is confirmed for each project address before anything is scheduled.

Other communities

Related services in Wisconsin

Questions

Bathroom Remodeling FAQs

Can I convert my tub to a walk-in shower?

In most bathrooms, yes. The drain location, floor framing and wall conditions decide how simple it is. A low or curbless entry takes more floor work than a shower with a standard curb.

Why does waterproofing matter if tile resists water?

Grout and many tile materials let some water pass through over time. A waterproofing layer behind the tile keeps that water out of the walls and subfloor, where it would otherwise cause rot and mold.

Do I need a bathroom exhaust fan?

A fan that vents outdoors removes moisture that would otherwise collect on walls, ceilings and inside cabinets, leading to peeling paint and mold. Whether a fan is required depends on local code and whether the room has a window that opens.

What if this is my only bathroom?

The work can be sequenced to limit how long the toilet and sink are out of service, but there will be stretches without a working shower. Decide where you will shower during those stages before work starts.

Should I choose a prefabricated shower or tile?

Prefabricated units install faster and have few seams to clean. Tile gives more size, shape and design choices and allows niches and benches. Both perform well when installed correctly.

Can grab bars be added later?

Yes, if solid blocking is installed inside the walls during the remodel. Adding blocking while walls are open is simple compared with cutting into finished tile later.

Ready to Plan Bathroom Remodeling in Wisconsin?

Share the scope and the address. We'll confirm availability and follow up to talk through options and next steps.

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