Water heater replacement cost

A water heater quote is four numbers stacked: the appliance, the hours, the code items that make it an installation rather than a swap, and the permit. Only the first is on a price tag anywhere, which is why the finished figure surprises people.

Access. A garage swap at floor level is the cheap case. An attic installation adds a pan with a drain, a platform, and the time it takes to get seventy pounds of steel up a pull-down ladder. A closet with a 28-inch door and a 24-inch heater adds a demolition line.

Fuel change. Electric to gas means a gas line, a vent and a permit for each. Gas to heat pump means a dedicated circuit, condensate disposal and enough air volume around the unit for it to work. Either turns a half-day into two days.

Code catch-up. The old unit was installed under a different edition. A replacement is judged under the current one, so a missing pan, an unstrapped tank in a seismic zone or an absent expansion tank all become your lines, not the previous installer's.

1. 1

   Thermal expansion control

   Required by IPC 607.3 wherever a check valve or pressure-reducing valve closes the system. Sixty to two hundred and twenty dollars of parts, and a failed inspection without it. Size it with the expansion tank calculator.

2. 2

   Pan and drain line

   Anywhere a leak would damage a finished surface below. Cheap in parts, awkward in labour when there is no drain within reach.

3. 3

   Shutoff and dielectric unions

   An old gate valve that will not close is discovered at the moment you need it to. Replace it while the water is already off.

4. 4

   Haul away

   Thirty-five to a hundred and twenty dollars depending on the transfer station. Small, certain, and routinely forgotten.

The Bureau of Labor Statistics put 2025 median pay for plumbers, pipefitters and steamfitters at $63,800 a year, or $30.67 an hour. That is a wage. The rate on an invoice carries that wage plus payroll burden, the unbillable half of the day, the van, the stock, the office and the margin — which is why a shop rate of three to five times the wage is arithmetic rather than greed.

Build yours rather than guessing it: the job price calculator takes wage, burden, billable share, overhead and target margin and returns the rate that makes those five things true at once.

Costs and estimating

Three questions separate a complete quote from a low one. Does it name the unit by model and capacity? Does it list the pan, the expansion tank and the permit as lines, or is it a single number? And does it say who hauls the old unit away?

A quote that is materially cheaper than the others is usually cheaper because something on that list is missing, and the missing item reappears as a change order once the water is off. Ask for the lines before you compare the totals.