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Water heaters

Water heater replacement cost, line by line

Fixr's January 2026 guide puts a typical tank replacement at about $1,400 installed, with most jobs between $900 and $3,000. Where yours lands depends on the fuel, the tank size, how the old unit vents, and what the inspector asks for once a permit is pulled.

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Tank water heater in a utility closet with an expansion tank, relief valve pipe and drain pan
Illustration. A tank heater with its expansion tank, relief valve pipe and pan.

Installed price by fuel and tank size

National ranges include the heater and the labor to install it. Electric tanks show a wider spread than gas ones because the category runs from basic resistance models to large units that need new wiring.

HeaterInstalled, national range
Gas tank$700–$2,700
Electric tank$500–$3,500
40-gallon tank$550–$2,300
50-gallon tank$700–$2,500
Tankless unit$1,000–$4,000
Heat pump (hybrid) tank$1,200–$4,600

Source: Fixr, Water Heater Installation Cost, updated January 27, 2026. Typical tank replacement $900–$3,000, average $1,400.

What goes into the quote

A replacement quote is a short list of line items, and the total only makes sense when you can see each one. The same Fixr guide puts installation labor at $300 to $1,500 for the job, or $45 to $200 an hour where plumbers bill by time.

What a written plumbing quote contains A blank estimate form with lines for the trip or diagnostic fee, labor as hours times rate or a flat price, parts and materials, permit and inspection, haul-away, the total, the warranty on parts and labor, and the date the price expires. PLUMBING QUOTE TRIP OR DIAGNOSTIC FEE$ LABOR: HOURS X RATE OR FLAT$ PARTS AND MATERIALS$ PERMIT AND INSPECTION$ HAUL-AWAY OF OLD PARTS$ TOTAL$ WARRANTY: PARTS __ YR LABOR __ YR PRICE GOOD UNTIL ____
The lines a written replacement quote should carry. Missing lines are where two quotes stop being comparable.
  1. The heater. Model number, capacity, first-hour rating and the tank warranty in years.
  2. Labor. Draining and removing the old tank, setting the new one, connecting water, fuel and venting, filling and testing.
  3. Permit and inspection. Fees are set by the city or county; ask whether the plumber pulls the permit and whether its fee is included.
  4. Code items. Expansion tank, pan, relief valve piping, stand or strapping, listed below.
  5. Connectors and fittings. New flexible water connectors, a new gas connector, sometimes new dielectric nipples.
  6. Haul-away. Disposal of the old tank, which some quotes include and some add at the end.

Code items an inspector can add

A permit brings an inspection, and the inspection checks the installation against the code your jurisdiction has adopted. These are the items that most often appear as extra lines.

ItemWhen it is requiredCode reference
Thermal expansion tankSupply has a check valve, backflow preventer or pressure regulatorIPC 2021 §607.3; UPC 2021 §608.3
Relief valve discharge pipeAlways; full size, no traps or valves, ends 6 inches or less above the floor or receptorIPC 2021 §504.6
Drain panWhere a leak would damage the building; at least 1½ inches deepIPC 2021 §504.7
Seismic strappingWhere the UPC applies; straps in the upper and lower thirdsUPC 2021 §507.2
Stand in a garageIgnition source at least 18 inches above the floor unless the heater is listed as vapor-ignition-resistantIFGC 2021 §305.3
Pressure-reducing valveStatic supply pressure above 80 psiIPC 2021 §604.8; UPC 2021 §608.2

Sources: International Plumbing Code 2021, Uniform Plumbing Code 2021, International Fuel Gas Code 2021. Local amendments can add or remove items.

Staying with the same type costs least

A like-for-like swap reuses the gas line, the vent and the electrical circuit. Changing the type of heater changes all three. Fixr estimates that converting from a tank to a tankless heater adds $400 to $1,800 to rough in the utilities, and a heat pump model needs room to breathe: ENERGY STAR recommends about 700 cubic feet of surrounding air, roughly a 10-by-10-foot room with a 7-foot ceiling, and most models run on a dedicated 240-volt circuit, though 120-volt plug-in versions now exist.

Federal efficiency standards are also moving. The Department of Energy's amended standards for consumer water heaters apply to units manufactured on and after May 6, 2029. Heaters already installed are not affected, but the rule is one reason some owners of electric tanks look at a heat pump water heater now rather than later. Owners weighing a switch to continuous hot water can compare the numbers on our tankless installation page.

Pick the size before you compare prices

Two quotes for a 50-gallon heater aren't comparable if one of them should have been for a 40. The Department of Energy method sizes a tank by its first-hour rating: estimate the hot water your household uses in its busiest hour, then choose a model whose rating falls within about 2 gallons of it. Our water heater size guide has the worksheet.

Signs it is time rather than a repair

Water seeping from the tank body settles it. Beyond that, rust-colored hot water, a tank that rumbles after flushing, a relief valve that keeps opening after the expansion tank and pressure have been checked, and a serial-number date past the warranty term all point toward replacement. If the heater simply stopped heating, check the smaller causes on the water heater repair page before you shop.

Before you sign a replacement quote

Is a 50-gallon tank worth the extra over a 40-gallon one?

Only if your household needs the hot water. Size by first-hour rating, not by tank volume: the Department of Energy method adds up the hot water used in your busiest hour and matches the heater to it. An oversized tank costs more to buy and loses more heat standing still.

Does replacing a water heater need a permit?

In most places, yes. The International Plumbing Code exempts stopping leaks and clearing stoppages, but not replacing an appliance, and many cities list water heater change-outs on their permit fee schedules. Ask the plumber whether the permit is in the quote and who schedules the inspection.

Can the plumber reuse my old expansion tank?

Sometimes, if it is sized for the new heater and still holds its air charge. Many plumbers replace it anyway, because a waterlogged tank fails quietly and the relief valve on the new heater starts dripping a few weeks later.

Why do quotes for the same heater differ by $1,000?

Because the tank is rarely the difference. Venting changes, a longer gas line, a new pan or stand, a permit, haul-away and the brand tier all move the total. Ask each company for the same line items and compare them one by one.

Sources

  1. Water Heater Installation Cost, Fixr, updated January 27, 2026.
  2. International Plumbing Code 2021, Chapter 1: Scope and Administration (§106.2, work exempt from permit), International Code Council.
  3. International Plumbing Code 2021, Chapter 5: Water Heaters (§504.4, §504.6, §504.7), International Code Council.
  4. International Plumbing Code 2021, Chapter 6: Water Supply and Distribution (§604.8, §607.3, Table 604.3), International Code Council.
  5. Uniform Plumbing Code 2021 (§507.2 seismic strapping, §608.2 pressure regulators, §608.3 expansion tanks, §807.4 dishwasher air gaps), IAPMO.
  6. International Fuel Gas Code 2021, Chapter 3 (§305.3, ignition sources in garages), International Code Council.
  7. Consumer Water Heaters: energy conservation standards and compliance dates, U.S. Department of Energy.
  8. Technology Fact Sheet: Water Heating (DOE/GO-102001-0785), first-hour rating worksheet, U.S. Department of Energy, August 2001.
  9. Is a Heat Pump Water Heater Right for Your Home?, ENERGY STAR, February 2, 2024.

Reviewed September 27, 2026. Found an error? Write to admin@plumbingrepairquotes.com.

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