Water Heater Replacement: Gas to Electric or Heat Pump Costs
A like-for-like swap costs far less than a fuel changeover. Here is what the extra circuit, gas line and venting add.
The average price to replace a water heater is $1,900 for a typical mid-range job, with most homeowners paying $1,450 – $2,450. That assumes a like-for-like swap. Change the fuel or the type of heater and the job grows, because the extra circuit, gas line and venting are priced separately from the tank itself.
Our full cost guide is at Water heater replacement. This article covers the part it can't: what happens to the bill when you switch fuels.
Why a changeover costs more than a swap
A like-for-like replacement reuses the existing water, gas or electric connections and vent. The plumber disconnects the old unit, sets the new one and reconnects. It is usually a half-day job.
A changeover means new infrastructure. We build each estimate from labor hours × local rates plus materials, checked against market prices and real quotes. The changeover options in our model are:
- Same fuel, like-for-like: reuse what's there.
- New electrical circuit: a dedicated circuit from the panel to the heater, for going gas to electric or to a heat pump water heater.
- Switch to gas: a new gas line and venting, for going electric to gas.
Equipment prices by type
The heater itself is the other half of the bill. These are typical mid-range costs for each type with a like-for-like connection:
- Gas tank (40-50 gal): $1,900
- Electric tank (40-50 gal): $1,600
- Tankless gas (condensing): $3,850
- Heat pump (hybrid) water heater, 50 gal: $3,400
The full table, with usual ranges and lifespans, is here:
| Material | Typical | Usual range | Lifespan |
|---|---|---|---|
| Electric tank, 40-50 gal | $1,600 | $1,250 – $2,050 | 10-15 years |
| Gas tank, 40-50 gal | $1,900 | $1,450 – $2,450 | 8-12 years |
| Heat pump (hybrid) water heater, 50 gal | $3,400 | $2,650 – $4,400 | 12-15 years |
| Tankless gas (condensing) | $3,850 | $3,000 – $5,050 | 15-20 years |
A heat pump water heater costs more up front than a standard electric tank. It also uses much less electricity to make the same hot water, so it is worth pricing against your running costs, not just the install quote.
Gas to electric: the new circuit
Moving from gas to an electric tank or heat pump water heater needs a dedicated circuit. The cost depends mostly on three things:
- Distance from the panel. A short run to a basement or garage is cheap. A long run to an attic or far corner costs more in labor and cable.
- Spare capacity. If your panel has no room or no capacity for the new load, you may need panel work, which is a separate and larger job. See our guide to House rewiring for how panel upgrades are priced.
- Access. Finished walls and ceilings take longer than open joists.
Electrical changes usually need a local permit, so make sure your installer pulls one. Ask the quote to state whether permit fees are included.
Take the old gas line out of service properly too. It should be capped by a qualified installer, not just closed off.
Electric to gas: the line and venting
Going the other way is the more expensive changeover in most homes. You need a new gas line to the heater and a vent that carries combustion gases outside. If an existing chimney isn't suitable, a new vent run adds labor and materials. Plumbing and structural changes usually need a permit as well.
Check first that gas is actually available at your home. If it isn't, this option is off the table.
Heat pump water heaters: extra considerations
A hybrid heat pump unit is taller than many tanks and needs air space around it to work well. It also cools and dries the room it sits in, which can be a plus in a warm basement and a drawback in a small closet. Allow for a condensate drain, too. These are installation details, not equipment costs, so confirm them in writing when you compare quotes.
Incentives
The federal tax credits for energy efficient home improvements (25C) and for residential clean energy (25D) have ended. Some states run IRA home energy rebate programs (HEAR/HOMES), and availability varies by state. Utilities also often offer rebates on heat pumps. The DSIRE database lists state and utility incentives, so check it before you sign.
How to compare quotes
- Ask each installer to price the heater and the changeover work as separate lines.
- Confirm whether the permit, haul-away of the old unit and any code upgrades are included.
- Check whether the electrical or gas work is done by licensed tradespeople.
- Put the totals through our quote checker ("is my quote fair") to see where they sit against the live model.
Our figures are before sales tax. Sales tax on materials varies by state, and labor is often not taxed, though the rules vary.
If you're also heating with gas
If you're thinking about moving more of the house off gas, look at Furnace replacement and Heat pump installation before deciding on the water heater. Doing the electrical work in one visit can make sense, and it avoids paying for a new gas line you may not need for long.
Bottom line
Budget the mid-range figure for a straight swap. For a fuel switch, add the circuit or the gas line and venting on top, and expect the quote to vary with distance, access and panel capacity. Get at least three itemized quotes, and compare each against our live ranges.