Gut bathroom remodel cost

A gut bathroom remodel costs $15,000 to $50,000, typically about $25,000. That buys a room taken down to the studs and the joists, the plumbing rough-in reworked, and everything rebuilt from the framing out.

What moves the price is not the tile or the vanity. It is what the walls and the floor turn out to be hiding once they are open, and whether the drains have to move.

What it costs

The gut range overlaps the midrange one, and that overlap is the useful part. A modest gut on a small hall bath can cost less than a large midrange remodel with expensive finishes. The tier describes how deep the work goes, not how nice the room ends up.

What "gut" actually means on a contract

The word gets used loosely, so pin it down before comparing numbers. A true gut has four parts, and a quote that leaves one out is a different job.

Wall finishes off to the studs. Tile, backer board, drywall or plaster and lath all come out, on every wall, not only the wet ones. That exposes the framing, the wiring and the supply and drain lines in one go.

Floor down to the subfloor or the joists. Tile and its mortar bed come up, the toilet flange comes out, and the subfloor is either inspected and kept or cut out and replaced.

Rough-in rebuilt. New supply lines to every fixture, a new shower valve, drain and vent lines checked and reworked to current code, new boxes and circuits for the lights, the fan and the outlets.

Inspections at rough-in. Because the walls are open, the plumbing and electrical rough-in is inspected before anything is closed. That inspection is a feature, not a hurdle: it is the only time anyone checks the work you are paying for.

A midrange remodel, by contrast, pulls the fixtures and the tile and puts new ones back on the same pipes. The drywall outside the shower usually stays. The quote is lower because the scope is smaller and because there is less to find.

What turns up behind the walls

This is where a gut quote and the final invoice part ways, and it is the honest reason the range is so wide. In older houses, expect at least one of these.

A soft subfloor at the toilet. Years of a slow wax-ring leak rot the plywood or plank subfloor around the flange, sometimes into the joist below. It cannot be tiled over.

Rot behind the tub or shower. Tile on drywall or on mortar with no membrane lets water reach the studs and the bottom plate for decades before anything shows.

Old supply pipe. Galvanized steel narrowed by scale, or gray polybutylene, should not be reconnected to new fixtures. If the house has it here, it has it everywhere.

Cast-iron drains past their life. Cracked hubs and a rusted-through bottom on a horizontal run are common in houses from before the 1970s. A plumber replaces the section in the open floor with PVC and a transition coupling.

A missing or improvised vent. Fixtures added in a past remodel are often vented badly or not at all. Code requires a proper vent now, and the inspector will check.

A fan that never left the house. An exhaust fan ducted into the attic, or into nothing, is a moisture problem that a gut is the right time to fix with a duct to a roof or wall cap. The bathroom exhaust fan guide covers sizing it.

None of these is a disaster. All of them are why a gut needs a written process for priced changes before demolition starts, not after the dumpster arrives.

Why a gut costs more than a refresh of the same room

Material is a smaller share of the difference than people expect. The gap comes from hours and from the number of trades.

A refresh is mostly a tiler and a plumber setting fixtures. A gut runs a longer chain: demolition, framing repairs, plumbing rough-in, electrical rough-in, inspection, insulation on exterior walls, drywall and backer board, waterproofing, tile, fixtures, paint, final inspection. Each trade waits for the one before it, and none of the waiting can be compressed by sending more people into a room that holds two.

The waterproofing is the other real difference. In a gut the shower is built from the studs out, so it can have a bonded membrane and a properly sloped pan instead of new tile over whatever was there. A tiled walk-in shower at $3,500 to $15,000 is the single largest line inside most guts, and the bathroom tile guide explains why the membrane, not the tile, decides how long it lasts.

When a gut is the right call, and when it is not

Gut it when the floor is soft underfoot, when tile is loose or hollow on the shower walls, when the supply is galvanized or polybutylene, when you want to move a fixture, or when the room has had two or three past remodels layered on each other. Each of those means the walls are coming open anyway, and paying for a refresh first is paying twice.

Gut it when you plan to stay ten years or more. A gut resets everything inside the walls to the same age, which a refresh cannot do.

Do not gut it when the floor is solid, the shower walls are sound, the pipes are copper or PEX, and what you dislike is the look. A midrange remodel at $9,000 to $45,000 replaces everything you see and leaves the working parts alone. For a tub that only needs to become a shower, the tub-to-shower conversion guide is the narrower job.

Think hard before a gut of the only bathroom in the house. Four to six weeks without a working toilet is the part of the project people underestimate most.

A worked example: gutting a 1960s hall bath

A five by eight foot hall bath in a 1960s ranch with galvanized supply lines and a cast-iron drain. The owners want a tiled walk-in shower where the tub was, and the contractor recommends repiping the whole house while the bath walls are open.

• Gut remodel of the bath: $15,000 to $50,000
• Whole-house PEX repipe: $4,500 to $12,000
• Cast-iron drain section found and replaced: 6 to 10 hours × $75 to $150 per hour = $450 to $1,500
• Total: $19,950 to $63,500

The range is wide because both priced lines are wide, but the structure is the point. The bathroom is one line; the repipe is a separate decision the gut makes cheaper, because the bath is already open and the plumber is already on site. The drain line is the kind of item that appears in week one, and at $450 to $1,500 it is a small share of the total only if the contract already says how found work is billed.

Reading a gut quote

A good quote answers these on paper.

• Does the scope say every wall to the studs, or only the wet walls?
• Is the subfloor priced to be replaced, or only inspected, and what is the rate per sheet if it fails?
• Which waterproofing system goes behind the shower tile, by name?
• Are the drain and vent lines replaced, or only reconnected?
• Who pulls the permits, and are the rough-in inspections on the schedule?
• What is the hourly rate for found work, and who approves it before it starts?

The last two lines are what separate a gut from a demolition with tile on the end.

Frequently asked questions

How much does it cost to gut a bathroom down to the studs?

$15,000 to $50,000 for a full bathroom, typically around $25,000. A small hall bath with the layout kept sits toward the bottom; a larger room with a fixture moved and a curbless shower sits toward the top.

Is a gut remodel worth it over a cosmetic update?

It is when something inside the walls or floor is failing, or when you want to change the layout. If the subfloor is solid and the pipes are modern, a midrange remodel gets you the same finished look for less, and the money saved is better spent elsewhere.

How long does a gut bathroom remodel take?

Usually four to six weeks of working time for a full bath, longer if a fixture is back-ordered or the inspector is booked out. The sequence of trades, not the size of the room, sets the schedule.

Should I repipe the house during a bathroom gut?

If the supply is galvanized or polybutylene, it is the best moment you will get. The bath walls are open, the water is already off, and the plumber is on site, which takes a share of the access and patching out of the repipe.

Related guides

• Bathroom remodel cost — the three tiers side by side
• Master bathroom remodel cost — the larger room, line by line
• Shower installation cost — prefab against tiled
• Repipe house cost — PEX against copper, by house size
• Bathroom exhaust fan cost — the fan most guts should replace