Seattle Plumbing Cost Calculator
Estimate 2026 Seattle plumbing installs: a 50-gallon gas or a tankless water heater, a kitchen sink, a 36-inch vanity, a replaced or refinished bathtub, or an outdoor faucet. Switch on each item you need, set the quantity, and the calculator totals the installed prices. Replacing a standard 50-gallon gas water heater, with the permit, comes to about $1,520.
Replacing fixtures as part of a remodel? The bathroom calculator and the kitchen calculator price the whole room. For a firm number, request a quote.
Your Estimate
Pick what you need and click Calculate
Each item shows its installed price per unit
What this calculator captures
Installed prices from this calculator, each item on its own. The gas water heater price includes the permit. Vanities, bathtubs and outdoor faucets are priced in the calculator above.
- Kitchen sink
- About $361
- 50-gallon gas water heater
- About $1,520
- Tankless water heater
- About $2,375
A new kitchen sink supplied and installed. A new faucet is not included.
A standard gas tank heater, installed with the permit where the existing gas line and venting fit.
The unit, the gas or electrical line upgrades it needs, and installation.
Using this calculator
What does each price include?
Each price is the installed scope of its item. The gas water heater is a standard 50-gallon tank heater, installed where the existing gas line and venting fit. The tankless price includes the unit, the gas or electrical line upgrades it needs, and installation. The kitchen sink is supplied and installed; a new faucet is not included. The vanity is a 36-inch single vanity with a cultured-marble top, supplied and installed. A replaced bathtub is the old tub out and a standard alcove tub in; repairing the wall around it is priced separately. Refinishing reglazes the tub you have, and the outdoor faucet is supplied and installed.
Is the permit included?
The 50-gallon gas water heater price includes the permit. The other items' prices do not include one. To compare plumbing permit rules, fees and review times across cities, see /permits/compare/plumbing.
Is there a job minimum?
No. Every item is priced on its own, so an outdoor faucet alone comes to about $143 and refinishing a bathtub to about $428.
How are these prices set?
Each item's price is set against the lowest installed price that registered Seattle-area contractors publish on their own websites for the same scope, dated 2025 or 2026, at about 95% of it. Lead-generation and pricing-template sites never set a price, and neither do Kolmo's own quotes. The full method is at /how-estimates-work.
What doesn't the calculator price yet?
This calculator prices installs. Toilets, faucets, garbage disposals, shower valves, dishwashers and electric tank water heaters are not in it yet; they are quoted after a walkthrough.
Keep planning
Continue the planning once you have a number.