Plumbing Cost Estimator
Plumbing estimates live and die on fixture count and rough-in runs, not floor area. Upload the plans or describe the job and the estimate comes back costed.
Drop plan sheets or site photos
Up to 6 files — they're read together as one job
Ballpark for planning and bid-checking — not a quote. Confirm against local supplier and subcontractor pricing.
What a complete plumbing estimate covers
- Fixture rough-ineach
- Fixture set / trimeach
- Supply line runLF
- DWV / drain line runLF
- Water heatereach
- Gas line runLF
- Excavation / under-slabLF
- Permit and inspectionlot
Scope most often left out
These are the lines that turn a won bid into a loss. Price them or exclude them in writing — never assume them.
- Under-slab or crawlspace access and the demolition to reach it
- Re-inspection trips when other trades are not ready
- Water heater expansion tank, pan and venting requirements
- Wall and ceiling patching after rough-in
- Fixture supply and stop valves when the owner supplies fixtures
Count fixtures, not square feet
A 3,000 sq ft house with two bathrooms is a smaller plumbing job than a 1,800 sq ft house with four. Square footage is a poor proxy for plumbing scope — fixture count, the distance from the main, and whether runs are accessible are what drive the hours. Build every plumbing estimate from a fixture schedule.
Rough-in and trim are two visits
Each is its own mobilisation, and each depends on other trades being ready. Estimating them as a single labour block hides the trip time and the standby risk when framing or drywall slips. Price them as separate lines so a schedule delay is visible in the number.
FAQ
How do you estimate a plumbing job?
Start from a fixture schedule rather than floor area. Price rough-in and trim separately for each fixture, add supply, DWV and gas runs by linear foot, then add the water heater, permits and any excavation. Upload the plans or describe the job and the estimator produces the costed line items, scope and risk for you.
Can it estimate from a plan sheet?
Yes. Upload the plumbing plan, the floor plan, or photos of the existing space — several at once if you have them — and they are read together as one job. Anything the drawings do not show, add in the description box.
What gets missed most often on plumbing estimates?
Access. Under-slab work, crawlspace runs and the demolition and patching required to reach existing lines are routinely left out, along with re-inspection trips when other trades are not ready.
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