Bathroom Plumbing Cost Estimator 2026: Rough-In, Moves and Fixtures

Ask ten homeowners what blew their bathroom budget and eight will say plumbing. It is invisible work, it is priced by trip and by trade, and it is where surprises live. The good news is that plumbing costs are surprisingly estimable: in 2026 bathroom plumbing runs $1,200 to $7,500, and the number is driven almost entirely by whether anything moves.

Bathroom Plumbing Cost by Job Type

• Fixture swap only, no lines moved (toilet, vanity, faucet): $600-$1,400
• Standard rough-in and trim-out, same layout: $1,800-$3,200
• Full rough-in for a new bathroom: $3,500-$7,500
• Moving a toilet drain: $1,200-$3,500
• Moving a shower or tub drain: $900-$2,800
• Adding a second sink line: $600-$1,600
• Whole-bathroom repipe from galvanized to PEX: $1,800-$4,500

What Plumbers Charge in 2026

• Hourly rate: $95-$165, with a one to two hour minimum
• Trip or service call fee: $75-$180
• Emergency or weekend rate: 1.5-2x standard
• Toilet install: $180-$400
• Tub install: $500-$1,400
• Shower valve replacement: $350-$850
• Water heater relocation: $600-$1,900

Plumbers price a bathroom in two visits: rough-in before the walls close, and trim-out after tile. Budget for both, not one.

Why Moving a Toilet Costs So Much

A sink drain is 1.5 inches and can travel through a wall. A toilet drain is 3 inches, needs a quarter-inch per foot of fall, and lives in the floor structure. On a slab that means saw-cutting concrete, excavating, re-piping and re-pouring. Over a crawlspace or basement it means opening the ceiling below. Either way the day rate multiplies, which is why the same fixture move ranges from $1,200 to $3,500 depending on your foundation.

Materials Behind the Wall

• PEX supply lines: $0.80-$2.50 per linear foot installed
• Copper supply lines: $3-$8 per linear foot installed
• PVC or ABS drain line: $2.50-$6 per linear foot
• Shower valve body: $90-$400
• Tub or shower drain assembly: $60-$200
• Shutoff valves: $15-$45 each
• Vent stack tie-in: $300-$900

Permits and Inspections

Any work that changes supply or drain lines inside a wall triggers a plumbing permit in most US jurisdictions. Expect $150-$600 for the permit and one or two inspections. Unpermitted plumbing is the single most common issue flagged in resale inspections, and correcting it later usually means re-opening finished tile.

How to Estimate Your Own Bathroom Plumbing

1. Start with $1,800 for a same-layout rough-in and trim-out.
2. Add $1,200-$3,500 for each fixture whose drain moves.
3. Add $600-$1,600 for a second sink.
4. Add $1,800-$4,500 if the supply lines are galvanized or polybutylene.
5. Add $150-$600 for permit and inspections.
6. Add 15% contingency for what appears once the wall is open.

Frequently Asked Questions

How much does bathroom plumbing cost in 2026?

$1,200-$7,500 depending on scope. A same-layout remodel is $1,800-$3,200 in plumbing, while a brand-new bathroom needing full rough-in runs $3,500-$7,500.

How much does it cost to move plumbing in a bathroom?

$900-$2,800 for a shower or tub drain and $1,200-$3,500 for a toilet. Slab foundations cost more than crawlspaces or basements because the concrete has to be cut and re-poured.

How much does a plumber charge per hour in 2026?

$95-$165 per hour nationally, plus a $75-$180 trip fee. Major metros like San Francisco, Seattle and New York run $150-$220 per hour.

Do I need a permit for bathroom plumbing work?

Yes, whenever supply or drain lines are added, removed or relocated. Like-for-like fixture swaps such as a new faucet or toilet generally do not require one.

What percentage of a bathroom remodel is plumbing?

Typically 15-25% of the total. It climbs toward 35% when fixtures move or old galvanized piping has to be replaced to pass inspection.