How much does a plumbing permit cost?
A plumbing permit costs $50 to $500 in 2026. What changes your price is below.
A water heater permit is $50 to $150 and is the one most often skipped. A bathroom addition is $150 to $500. A whole house repipe is $200 to $600. Sewer and gas line work needs its own permit and sometimes a separate inspection from the gas utility.
Estimate your plumbing permit cost
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Is this price fair?
A fair price is $50 to $150.
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Middle of the range: $100
What you are paying for
How we calculate this
Prices are for the United States in 2026 from published cost guides, checked September 2026. This is an estimate, not a quote.
Cost by job
| Water heater replacement | $50 to $150 |
|---|---|
| Tankless water heater install | $75 to $250 |
| New bathroom or fixture group | $150 to $500 |
| Sewer line replacement | $100 to $400 |
| Gas line (new or extended) | $50 to $250 |
| Whole house repipe | $200 to $600 |
| Water service line | $100 to $300 |
| Backflow device | $50 to $150 |
What to know before you book
| Water heaters | Almost every city requires a permit to replace a water heater, because of the gas or electrical connection, the venting and the pressure relief line. Plumbers who skip it are cheaper by $100 and you carry the risk. |
|---|---|
| What needs one | Moving or adding fixtures, any gas work, water heaters, sewer and water lines, repipes. Replacing a faucet, a toilet or a garbage disposal in the same spot does not. |
| Gas | Gas line permits often come with a pressure test the inspector watches. Some utilities do their own inspection before they turn the meter on. |
| Sewer | A sewer line permit may need a right of way permit too if the line crosses the sidewalk or street, $100 to $500 more, plus a bond in some cities. |
| Who pulls it | Homeowners can often pull plumbing permits for their own house. Gas is the exception; many places require a licensed plumber or gas fitter. |
| Resale | Home inspectors look for the permit sticker on the water heater. No sticker on a recent unit is a flag that leads to more questions. |
Why it costs what it costs
Plumbing permits are priced low because the inspection is short: a pressure test and a look at the connections. They exist because a bad gas connection or a missing relief line is a house fire or a flood, and because sewer work touches the city's pipes. The water heater permit is the one to stop skipping.
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Common questions
How much is a plumbing permit?
$50 to $500 in 2026. A water heater is $50 to $150, a bathroom addition $150 to $500.
Do I need a permit to replace a water heater?
In almost every city, yes. $50 to $150.
Do I need a permit to replace a toilet or faucet?
No, if it goes in the same place with no new lines.
Who pulls a plumbing permit?
The plumber, usually. Homeowners can often pull one for their own home, except for gas.
Other jobs and rates
Compare prices
Related jobs people check next, with the usual 2026 price.
| Job | Usual price |
|---|---|
| HVAC permit cost | $100 to $250 |
| Building permit cost | $50 to $2,000 |
| Electrical permit cost | $50 to $500 |
| Deck permit cost | $100 to $500 |