Plumbing & Water Costs
Plumbing prices swing mostly on one question: is the plumber swapping something where it already sits, or running new pipe? Replacing a water heater, toilet or disposal in the same spot is largely equipment plus a short visit. Moving a fixture, changing fuel type, digging in the yard or getting under a slab adds pipe, access work and often a permit.
The calculators below cover the plumbing and water projects homeowners price most often. Each one starts from a typical national job and lets you adjust for your state, equipment and extras. The table shows that starting point so you can compare projects before you open one.
Water heating and treatment
Tank and tankless water heaters, plus softening the water that feeds them.
| Project | Typical job | Typical price | Likely range |
|---|---|---|---|
| Water heater replacement cost | 50 gal gas tank, like for like | $1,660 | $1,060–$2,700 |
| Tankless water heater cost | Convert gas tank to gas tankless | $4,330 | $2,720–$7,230 |
| Water softener cost | Salt-based, new plumbing | $1,640 | $1,390–$1,990 |
Fixtures and in-home plumbing
Replacing the fixtures you use every day, and the pipes that feed them.
| Project | Typical job | Typical price | Likely range |
|---|---|---|---|
| Toilet installation cost | Two-piece toilet | $400 | $250–$800 |
| Bathtub replacement cost | Alcove tub, old tub removed | $1,300 | $680–$2,400 |
| Shower installation cost | Prefab stall | $3,500 | $2,000–$6,000 |
| Garbage disposal installation cost | 3/4 HP, like-for-like swap | $360 | $280–$500 |
| Repiping cost | 2,000 sq ft, PEX | $4,000 | $3,000–$5,500 |
Drains, sewer and drainage
Clearing, relining and replacing the lines that carry water away.
| Project | Typical job | Typical price | Likely range |
|---|---|---|---|
| Drain cleaning cost | Kitchen sink | $170 | $100–$300 |
| Sewer line cleaning cost | Rodding | $350 | $150–$600 |
| Sewer line replacement cost | 50 ft, traditional dig-and-replace | $4,750 | $2,500–$10,000 |
| French drain installation cost | 100 ft yard drain | $2,500 | $1,000–$5,000 |
| Sump pump replacement & installation cost | Replace a submersible pump | $700 | $400–$1,200 |
| Slab leak repair cost | Pipe reroute, with detection | $2,800 | $750–$7,600 |
Gas, wells and septic
Utility-side work that often needs a permit or a specialist.
| Project | Typical job | Typical price | Likely range |
|---|---|---|---|
| Gas line repair cost | Gas leak repair, with pressure test | $660 | $280–$1,200 |
| Well pump replacement cost | Submersible pump, typical well | $1,800 | $1,000–$2,500 |
| Septic tank installation cost | Conventional system, with soil test and permit | $8,400 | $3,850–$14,300 |
| Septic tank pumping cost | 1,000 gallon tank | $430 | $310–$700 |
What drives the price
- Swap or new location
- Replacing like for like is the cheapest case. Moving a fixture, adding a line or changing from one fuel to another brings pipe, venting and sometimes gas work.
- Access
- Slabs, crawl spaces, finished basements and tight utility closets slow the work down and can mean opening and repairing finished surfaces.
- Equipment type and size
- Capacity, efficiency and fuel move the equipment price more than anything else on a water heater, softener or pump.
- Local labor and permits
- Plumber wages differ by state, and many cities require a permit and inspection for water heaters, gas work and sewer lines. Our calculators adjust the labor share by state and list a permit as its own line when the calculator includes one.
- Emergency timing
- Burst pipes, backups and after-hours calls usually cost more than the same work scheduled in advance.
Before you hire
- Get more than one written quote and ask each contractor to itemize equipment, labor, permits and disposal.
- Ask whether the quote includes hauling away the old unit and any code upgrades the inspector may require.
- Confirm the plumber is licensed where your state requires it, and ask for proof of insurance.
- For gas, sewer and main-line work, ask who pulls the permit and whether the inspection is included.
- Photograph the existing setup, including labels, pipe sizes and shutoff valves, before the estimate visit.
These are planning estimates, not quotes. Your home, local codes and contractor will change the real price. See how we estimate and the disclaimer.
Common questions about plumbing & water costs
Why do plumbing quotes for the same job differ so much?
Scope, access, equipment grade, local labor rates and what is included (permit, disposal, warranty) all differ between quotes. Compare line items, not totals, and use the range on the calculator as a sanity check.
Do I need a permit for plumbing work?
It depends on your city or county and on the job. Water heaters, gas lines and sewer lines commonly need one, but rules vary, so ask your local building department. A licensed plumber normally handles the permit.
Should I repair or replace?
Ask for both prices. A repair is usually cheaper today, but on older equipment repeated repairs add up. Put the repair quote next to the replacement price from the calculator before you decide.
Planning guides
- Repair or Replace? How to Decide: Typical repair and replacement prices side by side, and the questions that settle it.
- DIY or Hire a Pro? A Practical Guide: Which jobs are reasonable to do yourself, and which are not worth the risk.
- How to Compare Contractor Quotes: Make quotes comparable, spot gaps, and keep a printable comparison sheet.
- Do You Need a Permit? Home Project Permits Explained: When a permit is needed, who pulls it, and the fee ranges our sources cite.
- Why Home Project Costs Differ by State: What moves prices between states, with real wage data for seven trades.