Based on aggregated data, a bathroom plumbing rough-in costs $1,500 to $5,000, with a typical three-fixture bathroom landing near $3,000. Within that total, materials account for roughly $300 to $1,200 and labor for $1,100 to $3,500 — meaning about 73 percent of a mid-range rough-in is labor. Typical duration is 2 to 4 days.
Rough-in is the plumbing that gets buried. It is priced, quoted and inspected before a single finish fixture is hung, and it is the line item that quietly sets the price of the rest of the bathroom: a vanity, a toilet or a shower that stays where the pipes already are is a fixture swap, and the same fixture moved four feet across the room is a rough-in job.
What a Bathroom Rough-In Actually Includes
A rough-in is three separate systems, run in the same walls and floor, and every quote covers all three whether or not it itemizes them.
| System | What it is | Typical scope in one bathroom |
|---|---|---|
| Supply | Hot and cold water lines from the nearest branch to each fixture | 60–100 linear feet of pipe, shutoff valves, a tub/shower valve body |
| Drain (the D and W of DWV) | Gravity drain lines carrying waste to the stack | 3-inch toilet drain, 1.5–2-inch sink and tub drains, traps, a closet flange |
| Vent (the V of DWV) | Pipes admitting air so drains flow and traps do not siphon dry | A vent for each fixture group, tied into the stack or through the roof |
The stack is the vertical pipe those drains and vents connect into. Its position in the house is the single most important physical fact behind a rough-in quote, because every foot of horizontal distance between a new fixture and the existing stack is pipe, fittings, framing to drill and labor hours to bill.
The rough-in ends at stub-outs — capped supply pipes standing proud of the wall and a drain closed off at the floor — followed by a pressure or air test and an inspection. Finish fixtures are a separate scope and a separate cost, covered on the toilet installation, bathroom sink installation and bathroom vanity installation pages.
Rough-In Plumbing Cost Per Fixture
This is how plumbers actually build a bid, and it is the number that lets a quote be checked against something. Each fixture carries its own supply, drain and vent work; the connection back to the stack is a shared line that is not repeated per fixture.
| Fixture rough-in | Low | Typical | High | What drives it |
|---|---|---|---|---|
| Toilet | $400 | $600 | $900 | 3-inch drain, closet flange, cold supply only |
| Lavatory sink | $350 | $500 | $800 | Hot and cold supply, 1.5-inch drain, trap arm |
| Tub or shower | $500 | $800 | $1,200 | Hot and cold supply, 2-inch drain, valve body set in the wall |
| Second sink (double vanity) | $300 | $450 | $700 | Shares the same drain and vent group |
| Bidet or bidet seat line | $250 | $400 | $600 | Cold supply tee off the toilet line |
| Vent and stack tie-in (shared) | $300 | $600 | $1,000 | Distance to the stack, whether the roof is penetrated |
| Permit and inspection (shared) | $150 | $300 | $500 | Jurisdiction fee schedule |
Add the four lines a standard three-piece bathroom needs — toilet, sink, tub/shower, plus the shared vent tie-in and permit — and the arithmetic lands where the national data lands: about $1,500 at the low end and $3,000 in the middle. That is the check. A quote that prices a three-fixture rough-in at $6,000 in an open, wood-framed floor 6 feet from the stack is pricing something the fixture count does not explain.
Cost by Bathroom Type
| Bathroom | Fixtures | Cost Range | Typical |
|---|---|---|---|
| Half bath (powder room) | Toilet + sink | $1,000–$2,500 | ~$1,600 |
| Three-quarter bath | Toilet + sink + shower | $1,400–$4,200 | ~$2,700 |
| Full three-piece bath | Toilet + sink + tub/shower | $1,500–$5,000 | ~$3,000 |
| Four-piece bath | Toilet + sink + separate tub and shower | $2,500–$5,000+ | ~$3,800 |
| Five-piece / double vanity | Toilet + 2 sinks + tub + shower | $3,000–$6,000 | ~$4,400 |
A half bath is the cheapest rough-in in the house because it drops the most expensive fixture group — the tub or shower, with its two supply lines, its 2-inch drain and its in-wall valve. Powder-room pricing is covered further on the half bath remodel cost page.
The step from three-piece to four-piece is not one extra fixture; it is one extra fixture group with its own drain, its own trap and its own vent. That is why a separate tub and shower adds $700 to $1,200 rather than the few hundred dollars that a second sink on the same vanity wall adds.
A rough-in prices one room’s supply and drain lines at $1,500 to $5,000. Replacing the supply distribution for an entire house is a different scope at $4,000 to $18,000, and whole house repipe cost breaks down how bathroom count, fixture count and foundation type set that figure.
New Bathroom vs. Moving a Fixture vs. Staying Put
This is the largest single cost fork in a bathroom project, and it is decided before any tile or fixture is chosen.
A rough-in is only one line of a larger project when the bathroom does not yet exist: adding a bathroom to a house runs $10,000 to $49,000, typically $21,000, and the $1,500 to $5,000 rough-in is roughly a seventh of that. The fork that actually sets that number is whether the room is converted out of existing space at $200 to $250 per square foot or built as new structure at $400 to $550.
| Scenario | Rough-in cost | What is happening |
|---|---|---|
| Fixtures stay in place | $0–$500 | Existing stub-outs and drains are reused; at most, valves and shutoffs are replaced |
| Sink or tub drain shifts under 3 feet, open joists | $200–$500 | Trap arm and supply lines are extended within the same joist bay |
| Sink or tub drain moves 3 feet or more, open joists | $500–$1,000 | New drain run, new vent path, framing drilled or notched |
| Toilet moved under 3 feet, wood-framed floor (plumbing only) | $500–$1,800 | Low end with an open basement or crawlspace below; high end with the floor opened from above |
| Toilet moved 3 feet or more, wood-framed floor (plumbing only) | $1,500–$5,000 | A 3-inch line at constant fall; crossing joists or a new vent puts it at the top |
| Toilet moved in a concrete slab (plumbing and re-pour) | $1,500–$6,000 | Slab saw-cut, trenched, re-plumbed and re-poured; finish floor is extra |
| Entirely new bathroom | $1,500–$5,000 | Full rough-in: supply, DWV and vent from the stack |
A layout that keeps every fixture on its existing drain is the difference between a $400 line item and a $3,000 one. This is where the “moving the plumbing” surcharge on a vanity, shower or small-remodel quote comes from — it is a rough-in cost wearing a different name. The knock-on effect on a whole-room budget is covered on the small bathroom remodel and shower remodel pages, and the shower-specific version of it on the tub-to-shower conversion and shower pan installation pages.
Of the three fixtures, the toilet is the one whose move costs most, because its 3-inch line has to keep falling all the way to the tie-in and cannot be bored freely through joists, where a sink’s 1.5-inch trap arm fits through a stud bay. The plumbing alone runs $500 to $6,000 depending on distance and on whether the floor is open below, framed or a slab, and a retiled floor commonly adds $700 to $2,000 when the room is not otherwise being remodeled — the cost to move a toilet breaks both down by distance and floor type.
Slab vs. Crawlspace vs. Basement Joists
Where the drain has to go determines most of the labor hours, and the concrete case is a different job from the other two.
| Floor structure | Rough-in cost | Access premium | Notes |
|---|---|---|---|
| Open joists, new construction or gutted floor | $1,500–$2,500 | baseline | Drains run in open bays; nothing to demolish or patch |
| Basement ceiling below the bathroom | $1,700–$3,000 | +$200–$500 | Drains are reachable from underneath; ceiling may be opened |
| Crawlspace | $1,800–$3,300 | +$300–$800 | Slower work in a confined space, longer runs to the stack |
| Second floor over a finished ceiling | $2,000–$4,000 | +$500–$1,500 | Ceiling below is opened, then patched and repainted |
| Concrete slab | $2,500–$5,000 | +$800–$2,500 | Saw cut, jackhammer, trench, backfill and patch |
Breaking a slab is priced as its own line. Aggregated data puts saw-cutting and breaking out a trench at roughly $25 to $50 per linear foot, and patching the trench back with new concrete at roughly $8 to $15 per square foot — plus $150 to $400 for spoil haul-away. A 20-foot trench for a toilet and shower drain therefore lands near $800 to $2,000 before any pipe is laid, and that line alone is what pushes a basement bathroom to the top of the $1,500 to $5,000 range. Slab pricing is covered in more detail in the concrete slab cost guide.
Two basement-specific lines sit outside the rough-in range entirely. If the bathroom floor is below the municipal sewer line, gravity cannot do the work and a sewage ejector pump and sealed basin adds $1,200 to $2,500. An upflush (macerating) toilet system is the alternative that avoids the slab cut altogether, at roughly $1,300 to $2,800 for the unit and installation — it trades a one-time concrete cost for a mechanical part that eventually wears out.
Distance to the Existing Stack
Every quote has a hidden per-foot component, and it is the reason two identical three-fixture bathrooms in the same house can price $1,000 apart.
| Run | Typical installed cost | Notes |
|---|---|---|
| PEX supply pair (hot + cold) | $10–$25 per linear foot | Flexible, few fittings, fast to pull |
| Copper supply pair | $25–$60 per linear foot | Soldered joints, far more labor per foot |
| 2-inch PVC drain | $30–$50 per linear foot | Must hold slope; may cross framing |
| 3-inch PVC drain (toilet) | $40–$70 per linear foot | Large bore, slope-critical, hardest to route |
| New vent to roof | $300–$800 total | Roof penetration and flashing |
A bathroom within 10 feet of the stack carries roughly $400 to $900 of run cost. At 25 to 30 feet — an addition at the far end of a house, or a basement bathroom placed for the room layout rather than for the plumbing — the same fixtures can carry $1,500 to $2,500 of run cost, before the fixtures themselves are roughed. That is the entire gap between the low and mid national figures, produced by nothing but distance.
Pipe Material: What the $300 to $1,200 Materials Range Really Is
The materials range on this project looks wide until it is read as what it is — a materials decision, not a size decision. A bathroom uses roughly 60 to 100 feet of supply pipe and 25 to 50 feet of drain and vent pipe. Priced in PEX and PVC, that is near $300. Priced in copper and cast iron, it is near $1,200.
| Pipe | Use | Material cost | Installed cost | Typical lifespan |
|---|---|---|---|---|
| PEX | Supply | $0.40–$2.00/ft | $1.50–$4.00/ft | 40–50 years |
| CPVC | Supply | $0.50–$1.50/ft | $1.50–$3.25/ft | 40–50 years |
| Copper (Type L) | Supply | $2.00–$6.00/ft | $4.00–$12.00/ft | 50–70+ years |
| PVC / ABS | Drain and vent | $1.00–$3.00/ft | $2.00–$6.00/ft | 50–75 years |
| Cast iron | Drain and vent | $6.00–$12.00/ft | $10.00–$25.00/ft | 75–100 years |
PEX is the reason a modern rough-in can hit the $1,500 low end at all: it bends around corners instead of needing an elbow at each one, it is pulled in continuous runs from a manifold, and the labor hours per foot are a fraction of soldered copper’s. Copper’s arguments are heat tolerance, UV stability and a longer service life. Cast iron’s single argument is noise — a 3-inch cast iron drain stack is dramatically quieter than PVC, which is why it still appears in a stack running down a wall behind a living room, usually as a partial substitution rather than a whole-house choice.
Across a 25-year hold, the copper premium on a bathroom rough-in works out to roughly $20 to $35 per year of service; the cast iron drain premium to roughly $10 to $20 per year. Those are small numbers against the total, and they are the honest way to compare the pipe options — the upfront spread is the misleading one.
That comparison scales badly, and the scaling is the point. One bathroom’s copper premium is a few hundred dollars; across a whole house the same decision separates a $4,000 to $10,000 PEX system from an $8,000 to $18,000 copper one, because the cost is bought in soldered joints rather than in tube. Copper vs PEX repiping cost works the joint arithmetic, the service life and the water-chemistry cases through in full.
Materials vs. Labor: Why This Project Is Different
| Component | Low | Mid | High | Share of Mid Project |
|---|---|---|---|---|
| Materials (pipe, fittings, valves, flange, vent) | $300 | $600 | $1,200 | ~20% |
| Labor (layout, drilling, running, testing, inspection) | $1,100 | $2,200 | $3,500 | ~73% |
| Permit and inspection | $150 | $300 | $500 | ~7% |
| Total rough-in | $1,500 | $3,000 | $5,000 | 100% |
Roughly 73 percent of a mid-range rough-in is labor — a higher share than tile, higher than a vanity, higher than almost any other line in a bathroom budget. Nothing on the material list is expensive. What is expensive is a licensed plumber’s time spent measuring fall on a drain, drilling framing without weakening it, sweating or crimping every joint, pressure-testing the system and standing for an inspection. Plumber labor commonly runs $45 to $200 per hour, with most residential work billed at $80 to $130 per hour, and a bathroom rough-in typically consumes 2 to 4 days.
That labor share has one direct consequence, and it is the next section.
Timeline, and the Second Plumbing Visit
A rough-in is not the last time the plumber is on site, and quotes differ on whether they say so. The plumbing on a bathroom is billed in two visits separated by weeks of other trades.
| Stage | When | Typical duration | Typical cost |
|---|---|---|---|
| Rough-in | After framing, before insulation and drywall | 2–4 days | $1,500–$5,000 |
| Rough-in inspection | Before anything is concealed | a few hours, scheduled | $0 (in the permit fee) |
| Trim-out (set fixtures) | After tile, paint and cabinets | 1–2 days | $500–$1,500 |
The rough-in itself typically takes 2 to 4 days across those first two visits: a day of layout and drilling, a day or two of running supply and DWV, and the pressure test. The wait between rough-in and trim-out is dead time for the plumber and billable time for nobody, but it is why a bathroom’s plumbing appears twice on a schedule and, on some quotes, twice on the invoice. A quote that looks low against the ranges on this page is worth reading for whether trim-out is inside it or outside it — a $500 to $1,500 difference that has nothing to do with the pipes in the wall.
Cost by City
Because pipe and fittings are priced nationally and labor is not, the city factor moves only the labor share of this project — which is most of it. The table below holds materials flat at the national $600 and scales the $2,200 labor line by each metro’s labor adjustment factor, which is how the site’s cost engine models it.
| City | Labor Adjustment Factor | Adjusted Typical Rough-In | Adjusted Labor Portion | Four-Piece Bath, High End | vs. National |
|---|---|---|---|---|---|
| Chicago, IL | 1.33 | $3,525 | $2,925 | $5,855 | +33% |
| Seattle, WA | 1.29 | $3,440 | $2,840 | $5,715 | +29% |
| New York, NY | 1.23 | $3,305 | $2,705 | $5,505 | +23% |
| Houston, TX | 0.93 | $2,645 | $2,045 | $4,455 | −7% |
| San Antonio, TX | 0.85 | $2,470 | $1,870 | $4,175 | −15% |
Labor adjustment factors are derived from BLS Occupational Employment and Wage Statistics (May 2025): the median ratio of local to national hourly wages across the trades that do this work. How this is calculated.
Chicago carries the highest factor in the dataset at 1.33 and San Antonio the lowest at 0.85 — a spread that puts roughly a thousand dollars between the same three-fixture rough-in in those two metros. The ordering is not an intuitive one: trade labor tracks union density and local plumber supply, not the general cost of living, which is why Chicago prices above New York (1.23) and why Houston (0.93) sits below the national line despite being a large, expensive metro. The calculator above applies any city’s factor to a chosen project size.
Permits and Inspection
A plumbing permit is typically required for a bathroom rough-in, whether the bathroom is new or an existing fixture is being relocated. Aggregated data puts the permit fee at $150 to $500 for a residential bathroom, with some jurisdictions charging a flat plumbing-permit fee and others a per-fixture fee of roughly $10 to $50.
The inspection sequence is what makes rough-in different from finish work. In jurisdictions that adopt the International Residential Code, the rough-in is inspected while it is still open — the drain and vent system is tested (commonly a water or air test held at a set pressure for a set period) and the supply lines are pressure-tested, and this happens before insulation, drywall or floor covering goes on. A failed inspection carries a re-inspection fee of roughly $50 to $150 plus the cost of reopening anything already closed. Work concealed before inspection is the expensive failure mode: the cost is not the plumbing correction, it is the demolition and rebuild of finishes that were installed over it.
DIY vs. Professional Rough-In
Rough-in is permit-and-inspection work. That is a statement about the process, not about capability: in most jurisdictions a homeowner may pull an owner permit on a house they occupy, in others only a licensed plumber may pull a plumbing permit, and in all of them the work is inspected before it is concealed.
| Item | DIY | Professional |
|---|---|---|
| Pipe, fittings, valves, flange | $300–$1,200 | included |
| PEX crimp or expander tool (buy) | $50–$250 | — |
| Hole saws, auger bits, PVC cutter | $60–$150 | — |
| Pressure test gauge / test balls | $25–$60 | — |
| Permit | $150–$500 | $150–$500 |
| Labor | 20–40 hours of own time | $1,100–$3,500 |
| Total | $585–$2,160 + own time | $1,500–$5,000 |
The entire DIY saving is the labor line, which is $1,100 to $3,500 — and it is the same line that buys layout experience, a pressure test that holds, and a system that passes inspection the first time. The costs that sit on the other side of the ledger are asymmetric: a supply joint that weeps behind finished drywall is a water damaged floor repair and a wall rebuild, and a drain run at the wrong slope is a slab or a floor opened a second time. Where the floor structure itself is questionable, subfloor replacement is its own project sitting under the bathroom.
What Drives the Price
- Fixture count — $250 to $1,200 each. The most predictable variable in the quote. Each fixture group adds supply, drain, trap and vent work.
- Distance to the stack — $10 to $70 per linear foot. A bathroom placed for the floor plan rather than for the plumbing can carry $1,500 or more of pure run cost.
- Concrete slab — $800 to $2,500. Saw cut at $25 to $50 per linear foot, patch at $8 to $15 per square foot, plus haul-away.
- Pipe material — $300 to $1,200 in materials. PEX and PVC at one end, copper and cast iron at the other; the labor per foot moves with it.
- Below-sewer-line basement — $1,200 to $2,500. A sewage ejector pump and basin, or $1,300 to $2,800 for an upflush system instead.
- Vent routing — $300 to $800. A new vent through the roof costs more than tying into an existing stack; an air admittance valve, where accepted, is $30 to $80.
- Permit and inspection — $150 to $500. Plus $50 to $150 per re-inspection.
- Old cast iron or galvanized pipe — $500 to $2,000. Tying new PEX and PVC into a 60-year-old system commonly means transition fittings and replacing a deteriorated section that will not take a connection.
- Access and demolition — $200 to $1,500. Opening and patching a finished ceiling below the bathroom, or working prone in a crawlspace, is billable time before any plumbing starts.
Related Bathroom and Plumbing Costs
Rough-in sits underneath every other bathroom line item, which is why fixture pages price the same work differently depending on whether the pipes move. A plumbing cost overview covers the trade’s other projects — water heaters, drain cleaning and pipe repair — across the same national dataset. Fixture-level work that connects directly to a rough-in includes toilet installation, bathroom sink installation and shower valve replacement — the last of which is the one fixture job that reaches back into the rough-in, since the valve body sits inside the wall.
On the finish side, tile shower installation, bathroom tile installation, bathtub replacement and walk-in shower all assume the rough-in is done and the stub-outs are where the design says they are. When they are not, the difference between those quotes and a much larger one is the table further up this page.
The full cost calculator applies a city’s labor adjustment factor to a rough-in of a chosen size, and the methodology page explains how the national ranges are compiled and how the city factors are measured.
Last updated: October 2026. All figures reflect aggregated national cost data and are not a quote for a specific bathroom. Actual pricing depends on fixture count, distance to the stack, floor structure and local market. See the methodology page for how figures are calculated and sourced.