How Much Does a Tub-to-Shower Conversion Cost in Duluth, MN?
National cost guides put a tub-to-shower conversion at about $1,500–$8,000, according to HomeAdvisor. That is a U.S. range, not a Twin Ports Contracting & Repair price. In Duluth the final figure depends on the shower type, whether the drain moves, what the old tub wall hides, and a building permit the city requires. A flat written quote gives the real number.
Updated by Twin Ports Contracting & Repair, Duluth, MN
What Drives the Cost of a Tub-to-Shower Conversion in Duluth and Superior?
Three things drive the price: the kind of shower, whether the drain moves, and what shape the valve and walls are in. A fiberglass or acrylic base with a surround sits at the low end, and a tiled shower with a custom pan, a bench or a glass door sits at the high end.
A second national guide puts the same job at $2,000–$12,000 (This Old House), a spread that follows those choices. The drain matters because a tub drain and a shower drain are not in the same spot, and shifting it means opening the floor.
The valve counts too. Reusing a sound valve behind the wall saves money, but if the tub-and-shower valve is old or its stems are corroded, replacing it while the wall is open is cheaper than doing it later. We do not apply a local multiplier to the national ranges; our firm written quote prices your bathroom as it actually is.
The Duluth Permit and What It Adds
Duluth treats a tub-to-shower swap differently from a like-for-like fixture exchange. The City of Duluth says replacing a tub with a shower needs a building permit, and work that alters the water supply, such as installing a shower, needs a plumbing permit (City of Duluth). Permit fees and inspection scheduling are real parts of the timeline and budget, so ask about them in the quote.
Superior, WI's Permits Not Required list covers tile and cement board under tile, but moving fixtures is a different matter, and the list sends unlisted work to the building inspection office (City of Superior). Any new wiring, for a fan or a light over the shower, is done by a licensed electrician under an electrical permit. For the steps in order, read our tub-to-shower conversion guide.
What the Old Tub Wall Can Hide
An estimated 43% of Duluth's housing units were built before 1940, according to the city's 2025 Housing Needs Analysis. When a cast-iron tub comes out of a house that old, the floor and wall behind it are often the first time anyone has seen them in decades. Rot at the tub's edge, damaged subfloor, plaster that crumbles at the cut line and old supply pipe are all possible, and each adds labor.
Weight matters as well. A cast-iron tub takes more than one person to move, and getting it down a narrow stair of a hillside Duluth house adds time. Homes built before 1978 may have lead paint on the trim and walls, which changes how tear-out is handled. We note those unknowns in the written quote instead of leaving them as surprises.
Shower Choices That Change the Budget
Prefabricated bases and wall panels are the quicker route; a tiled shower takes longer because of the waterproofing and cure times. Curbless entries and large benches need more floor work. If a wide, low entry matters for safety later in life, our post on aging-in-place bathroom upgrades covers grab bars and walk-in designs, and the shower remodeling page lists what we install. We do not sell tubs or showers, so you buy the base, surround and fixtures from the supplier you choose, and we install them. If you are keeping the shower where it is and only rebuilding it, our shower remodel cost guide fits better.
How Do You Get a Flat Written Quote for a Tub-to-Shower Conversion?
Send a photo of the tub and the walls around it, the bathroom's dimensions, the year the house was built and the kind of shower you want. The quote comes back in writing, and nothing starts until you approve it; the $95 visit fee is waived when you approve the work.
Compare against our handyman cost page and pricing. We work in Duluth and Superior. Text photos and a short description to (715) 919-7956, or ask for a written quote.
Cost at a Glance
| Scope | What it includes | Planning range |
|---|---|---|
| Typical conversion (HomeAdvisor) | Remove the tub, install a shower base or pan, walls and fixtures | $1,500–$8,000 |
| Typical conversion (This Old House) | Same job priced by a second national guide, wider spread | $2,000–$12,000 |
| Prefabricated base and surround | Lower end of the national range, standard size and fixtures | Toward the low end of the ranges above |
| Tiled shower with custom pan | Waterproofing, tile work, bench or glass, higher end | Toward the high end of the ranges above |
Common Questions
Does converting a tub to a shower need a permit in Duluth?
Yes. The City of Duluth says replacing a tub with a shower needs a building permit, and work that alters the water supply, such as installing a shower, needs a plumbing permit. Any new wiring is done by a licensed electrician under an electrical permit. In Superior, WI, moving fixtures goes beyond the city's no-permit list, so we confirm with the building inspection office before quoting.
Why is a tub-to-shower conversion so much more than swapping a faucet?
Because the work touches the floor, walls and drain, not just a fixture. The tub comes out, the drain is usually repositioned, the valve may be replaced, and walls are rebuilt and waterproofed before the shower goes in. That combination of plumbing, carpentry and finish work is why national guides put the job in the thousands rather than the hundreds.
Can a cast-iron tub be removed without wrecking the bathroom?
Usually, but it takes planning. Cast iron is heavy and often has to be broken up in place or carried out with several people, and plaster walls near it can crack. Narrow stairs and tight doorways in older Duluth houses make this harder. We look at the access in your photos and price the removal in the written quote instead of guessing.
Will a shower conversion cost more in an older Duluth home?
It can. An estimated 43% of Duluth homes were built before 1940, and the wall behind an old tub may show rot, brittle supply pipe or uneven framing once opened. None of that is a given, so we state in the quote how any hidden damage would be handled. A house built before 1978 may also have lead paint that changes tear-out practices.
Do you supply the shower base, doors and fixtures?
We install them; we do not sell tubs or showers ourselves. You choose and buy the base, surround, door and valve trim from the supplier you like, and we can help check that the sizes fit the opening before you order. The flat quote shows who supplies each item, so the labor and the materials are never mixed up.
Related Pages
Want the Real Number for Your Project?
Start with photos and measurements if you have them. The price is in writing before the work begins.