Plumbing
Plumbing bids live and die on access and code: a water heater on an open garage wall is a same-day swap, while the same tank in an attic over finished ceilings adds a pan, straps and a slow carry that stretches the labor bill. What the code makes you add — expansion tanks, seismic strapping, cleanouts, backflow prevention — routinely rivals the price of the fixture itself, and licensed-plumber rates have kept climbing through 2026. Materials swing less than labor, but copper-versus-PEX and open-trench-versus-trenchless choices still move the biggest jobs the most. Pick the calculator that matches your project below, set it to your real conditions, and take the state-adjusted range with you when the quotes come in.
Cost data reviewed September 2026 · Maintained by the FixTally Editorial Team
Plumbing project costs compared
Every range below is computed live from each calculator at its default inputs, at national-average labor and material rates. Open any tool to set your real tank size, pipe material, line length and state.
| Calculator | Typical range (defaults, national) | When to use it |
|---|---|---|
| Repiping Cost Calculator | $5,750 – $9,710 | Repeated leaks, rusty water or galvanized/polybutylene pipe — a whole-house repipe in PEX or copper, walls open or patched. |
| Sewer Line Replacement Cost Calculator | $5,160 – $8,710 | Repeat main-line backups, roots or a belled pipe — open trench, pipe bursting and cured lining compared before you commit. |
| Tankless Water Heater Cost Calculator | $3,540 – $5,970 | Endless hot water on your mind — sizing by household GPM plus the venting and gas-line upgrades tankless demands. |
| Water Heater Cost Calculator | $1,540 – $2,590 | A leaking or aging tank heater — the swap, venting, expansion tank, pan, haul-away and permit priced line by line. |
| Sump Pump Cost Calculator | $590 – $1,000 | A wet basement or crawlspace — pump size, pit cutting, discharge run and whether battery backup is worth it. |
| Toilet Installation Cost Calculator | $530 – $890 | A new, replacement or reset toilet — including flange repair, fresh supply stops and haul-away of the old one. |
Ranges are estimates at default inputs, not quotes — every tool shows an itemized materials/labor/permits breakdown and adjusts to your state inside the calculator.
Related project categories
- Kitchen & bath
Remodels that move drains, supply lines and vents — price the whole room before the plumbing scope is set.
- Whole-home
Additions, basement finishing and ADUs that extend water supply and drain lines into new space.
- Repairs & restoration
When a leak has already done its work — water damage drying and mold remediation priced separately.
- All calculators
Browse the full index, including repair-or-replace and material takeoff tools.
Plumbing cost questions
Why do plumbing quotes for the same job vary so much?
Access and code items explain most of the spread. Work behind finished walls, under a slab or in a tight crawlspace takes longer per fitting, and current codes often require additions the old installation never had — expansion tanks, drain pans, seismic straps, cleanouts. Some quotes also exclude what comes after: drywall patching, floor repair, hauling the old unit. Demand itemized bids so you can see whether a low price skipped a code item or the restoration.
Which plumbing jobs cost the most — and which cost the least?
At each tool's default inputs, the repiping calculator lands around $7,190 typical ($5,750–$9,710), versus about $660 ($530–$890) for the toilet installation calculator — roughly 11× the cost. Whole-house pipe work with wall access and restoration sits at the top; a fixture swap measured in hours sits at the bottom.
Which plumbing jobs need a permit?
Water heater replacements, repipes, new water or sewer lines, and most work touching the main supply or drain typically require one; like-for-like fixture swaps such as a toilet usually don't. Rules vary by city and county, so confirm with your local building department. Unpermitted plumbing can complicate a resale and give an insurer grounds to deny a water-damage claim — the permit line in each calculator shows what the paperwork actually adds.
Can I handle any of this work myself?
Resetting a toilet or swapping a sump pump is realistic for a handy homeowner in many areas; gas water heaters, repiping and sewer mains are licensed-plumber work almost everywhere, and many jurisdictions prohibit permits for owner-performed work on those lines. DIY plumbing that fails can flood finished space, and some manufacturers' warranties require professional installation — price both routes before you decide.