Why do plumbers charge so much to replace a water heater?
The tank is the part you can see. The rest of the price is the work of bringing a new heater up to current code, getting it inspected and getting the old one out.
A heater installed fifteen or twenty years ago met the code of its day. Replacing it now usually means adding an expansion tank, a drain pan where the heater sits over a finished room, a new relief valve and discharge line, and on a gas unit, a vent sized for the new heater.
Then there is the labor you never see. Draining an old tank full of sediment can be slow, and a full size heater is heavy and awkward on a basement stair. Valves and connectors that have sat untouched for years are swapped instead of trusted.
None of that is padding. It is what the inspector looks for. A cheap phone quote that skips those items tends to grow on installation day, when backing out is no longer practical.
If a quote looks high, ask to see it broken into the heater, the code items, the permit, disposal and labor. A plumber who will not split it out is harder to compare, and one who will is usually happy to explain each line.
Want it looked at?
Ask us for an itemized replacement price so you can see exactly where the money goes.