What will a water heater actually cost you?
Not the national average — your job. Answer the scope questions the way a plumber would ask them and the estimate assembles itself line by line, with every band traceable to a published source.
Not sure? The sizing tool works it out from the draws in your own busiest hour. Ignored for tankless and heat pump units, which the source prices as one band each. A propane tank is priced on the same capacity bands as other tanks; the source does not split them by fuel.
The tool starts at zero. Enter the extra labour hours your installer quotes for a cramped space.
Installed cost for this scope
$2,325
Range across the published bands: $825–$3,800.
This figure is the midpoint of the low and high totals, and those bands are wide, so read it alongside the range rather than instead of it. The bands are historical cost estimates from an archived copy of the cost guide dated August 8, 2025, not current quotes. It sits above the national average reported by a different cost guide (checked 2026-10-05). That average does not say which jobs it includes, so treat the comparison as rough. The widest single band here is storage tank, 50 gallons, supplied and installed, so that is the line to press an installer on first. Excluded: sales tax, any rebate or credit, drywall or tile repair after a relocation, and emergency or after-hours call-out charges.
| Line item | Low | High |
|---|---|---|
| Storage tank, 50 gallons, supplied and installed | $700 | $3,100 |
| Permit fee, gas-line or electrical work | $50 | $200 |
| Remove and dispose of the old appliance | $75 | $500 |
Why an average is close to useless here
A national cost guide, checked on 2026-10-05, reports an average replacement cost of $1,348[1] across a range of $350–$12,000. A figure with a thirty-four-fold spread between its ends is not describing one job; it is describing every job at once. The useful question is which end of that range your house sits at, and that depends on the appliance and on the work around it.
A like-for-like gas tank going back into an existing alcove with a working flue is the cheap end: $700–$3,100 for a fifty-gallon unit[2], plus a permit and haul-away. The same household choosing tankless pays $1,400–$5,600 for the unit and its labour[2]. A gas tankless install may also need a first-time vent at $500–$1,500[2] and a larger gas line at $350–$750[2], each priced separately in the guide we cite. Ask the installer which of them applies to your house.
The electric side has the same trap wearing different clothes. A heat pump unit runs $2,000–$4,600 installed[2], but federal guidance says it needs a space that stays between 40 and 90 °F year-round with at least 1,000 cubic feet of air around it[3]. A larger electrical load may need a new circuit at $250–$900[2] or a panel at $850–$1,700[2]; the installer decides which, and either one turns part of a plumbing job into an electrical one.
The four questions that decide your number
Is it going back where the old one was? Relocation adds $500–$2,500[2], and the guide we cite says the price depends on the tank size and how accessible the new spot is.
Does the exhaust path change? Reusing a sound vent has no separate price in the guide we cite. Replacing one is $100–$600[2], and creating one where none exists is $500–$1,500, so ask whether it is in the quote.
Does the supply change? A bigger gas line ($350–$750), a dedicated circuit ($250–$900) or a panel ($850–$1,700) is each a separately priced line in the guide we cite.
Can two people get to it? Cramped spaces such as closets are charged by the hour on top of everything else: $125–$300 an extra labour hour in the guide we cite[2].
Of those four, the exhaust path has the most priced answers: the source gives one price for a first-time vent and another for replacing an existing one, in a single sentence.
A word about where those cost bands come from, because it changes how much weight they deserve. The physics on this site, the efficiency standards, the draw-pattern definitions and every energy price are published by federal agencies. Installed prices are not. No agency publishes what a plumber charges to fit a water heater, so the installed-cost bands here come from one commercial cost guide (HomeGuide, cited through the Internet Archive copy of August 8, 2025), which does not publish its sample, its region mix or its date range. That makes them historical estimates and weaker evidence than everything else on the site. Where a federal document does cover a question — sizing, efficiency, service life, energy price — this site uses that document and says so.
Questions people actually ask
How much does it cost to replace a water heater?
HomeAdvisor's cost page, checked on 2026-10-05, reports an average of $1,348 within a range of $350–$12,000. It says its figures are updated automatically, so the average moves over time, and it does not say which jobs make up the average, so the tool above prices your own job line by line instead.
Why is my quote so much higher than the average?
Often because the job includes work the average does not describe. A first-time vent run adds $500–$1,500, a panel replacement $850–$1,700, and moving the appliance $500–$2,500. Ask which of those lines is in your quote before assuming you are being overcharged.
Is a permit really necessary for a water heater?
The cost guide we cite puts permit fees for gas-line or electrical work at $50–$200, which is small next to the appliance. That band covers those two kinds of permit only; your own jurisdiction's fee schedule is the figure for anything else. Your jurisdiction sets the rule, not this page.
Does the installer take the old one away?
Removal and disposal is a separate priced line: $75–$500 in the cost guide we cite, depending on whether the tank has already been drained and disconnected. If a quote seems low, check whether that line is in it.
Sources for the numbers above
- HomeAdvisor — https://www.homeadvisor.com/cost/plumbing/install-a-water-heater/ (retrieved 2026-10-05)
- HomeGuide — Historical cost estimate — archived source dated August 8, 2025: https://web.archive.org/web/20250808205107/https://homeguide.com/costs/water-heater-installation-cost (checked 2026-08-06; re-checked 2026-10-05). The live page refused an automated check on 2026-10-05, so whether it still prints these figures is not known.
- U.S. Department of Energy, Energy Saver (archived) — Archived source dated June 30, 2026: https://web.archive.org/web/20260630092818/https://www.energy.gov/energysaver/heat-pump-water-heaters (checked 2026-08-06; re-checked 2026-10-01)