Estimate 2026 bathroom plumbing cost for remodels, fixture replacement, moving fixtures, and new bathroom rough-in, adjusted for your state.
Plumbing labor and rough-in only — not tile, cabinets, or finishes.
Estimates use 2026 average cost data adjusted for your state. Actual pricing depends on access, existing conditions, and local material costs. Always get a written quote before authorizing work.
Plumbing is usually 15 to 25 percent of a bathroom remodel budget, and it is the portion where decisions made early have the largest cost consequences. The single most important one: whether fixtures stay where they are.
Replacing fixtures in their existing locations is straightforward work. Moving a toilet, tub, or shower drain means new drain lines at correct slope, likely new venting, and on a slab foundation, cutting and jackhammering concrete before repouring. That change alone can double the plumbing portion of a remodel. If budget is the constraint, keeping fixtures within a foot or two of their current drains saves more than any material substitution will.
Every fixture needs a vent to drain properly, and moving a fixture frequently means running new vent piping — through walls, up through the roof, or tying into an existing stack if one is close enough. It is not visible in the finished room, which is exactly why it gets left out of optimistic early budgets. If a contractor has not addressed venting in a layout-changing quote, that quote is incomplete.
The calculator prices plumbing labor, rough-in, and fixture setting. Tile, cabinetry, countertops, electrical, drywall, paint, and the fixtures themselves are separate. A full bathroom remodel typically runs $12,000 to $35,000 all-in; the plumbing portion above is one slice of that.
| Scope | Plumbing cost | Notes |
|---|---|---|
| Fixture swap, same locations | $500–$2,500 | Toilet, sink, faucet replacement |
| Remodel, same layout | $1,500–$5,000 | New rough-in, existing drain locations |
| Remodel, fixtures moved | $3,500–$11,000 | New drains, venting, slab work if applicable |
| New bathroom addition | $5,000–$18,000 | Full rough-in, possible main line upsizing |
| Tub to shower conversion | $1,200–$4,000 | Drain relocation and resize required |
| Custom tile shower pan | $1,400–$4,500 | Pan, drain, waterproofing |
| Fixture | Install / set cost | Notes |
|---|---|---|
| Toilet | $200–$600 | Higher if flange or subfloor is damaged |
| Bathroom sink and faucet | $180–$550 | Per fixture |
| Standard tub | $500–$1,800 | Access and removal drive the range |
| Shower valve replacement | $300–$900 | Requires wall access |
| Bidet or smart toilet | $300–$900 | May need a nearby electrical outlet |
| Freestanding tub filler | $400–$1,200 | Floor-mounted requires slab or floor work |
Roughly $1,500 to $5,000 when the layout stays the same, and $3,500 to $11,000 when fixtures move. New bathroom additions run $5,000 to $18,000 for plumbing alone. That is plumbing labor and rough-in only, not tile, cabinets, electrical, or the fixtures themselves.
On a crawlspace or basement foundation, moving a toilet a few feet is moderate work — typically $500 to $1,500. On a slab it means cutting concrete, re-sloping drain line, repouring, and often new venting, which commonly runs $1,500 to $3,500 for the same few feet. It is the most consequential layout decision in a slab-home bathroom.
Fixture swaps in existing locations often do not require one. Anything that moves drains, adds fixtures, alters venting, or adds a bathroom does. Permits protect you at resale and on insurance claims, and inspection catches slope and venting errors that would otherwise show up as chronic drain problems later.
Yes, and it is a common remodel. Tub and shower drains differ in size and position, so the conversion requires drain work rather than a simple swap — on a slab that means opening concrete. Budget $1,200 to $4,000 for the plumbing side, plus tile, glass, and waterproofing separately.
Relocating drain lines, particularly through a concrete slab. Supply lines are relatively easy to reroute because they are pressurized and can run anywhere. Drains rely on gravity and must maintain precise slope, which is why moving them is disproportionately expensive.
If the walls are already open and your home has galvanized or aging piping, yes — the access is the expensive part of a repipe and you are already paying for it. Adding new supply lines to the bathroom during an open-wall remodel costs a fraction of doing it later as a standalone job.
Water damage compounds every minute it continues. Licensed plumbers are available 24 hours a day, including weekends and holidays.
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