How long does a water heater installation take?

A straightforward tank swap in the same location typically takes 2 to 4 hours. Tankless installs, gas-to-electric conversions, or jobs requiring new venting can take a full day or longer.

Should I repair or replace my water heater?

If your tank is leaking from the tank body itself (not a fitting) or is more than 8-10 years old, replacement is usually more cost-effective than repair. Fitting leaks, thermostat issues, and heating element failures on newer units are often worth repairing first.

Do I need a permit to replace a water heater?

Most jurisdictions require a permit for water heater replacement, especially for gas units or any change in venting. A licensed plumber will typically pull the permit as part of the installation price — confirm this is included in your quote.

Why do gas water heaters cost more to install than electric?

Gas units require venting to the exterior and a gas line connection, both of which add labor and material cost. Electric units only need an electrical connection, which is typically simpler and cheaper to install or modify.

How Much Does It Cost to Replace a Water Heater? (2026 Guide)

Prices updated July 19, 2026

HomeRepairPrice Editorial Team

A new water heater installed costs $900 to $3,500 on average in 2026, with most homeowners landing around $1,200 to $1,650 for a standard 40-gallon gas or electric tank. Tankless systems cost more upfront — $1,400 to $5,600 installed — but last longer and take up less space.

Use our Water Heater Cost Calculator to get a quick estimate for your specific setup, or use the breakdown below to sanity-check a quote.

Cost by tank size and type

Installed cost, including unit and standard labor — 2026

Item	Installed Cost	Notes
40-gallon electric tank	$600 – $1,600	Cheapest option; no gas line needed
40-gallon gas tank	$900 – $3,000+	Higher if venting or gas line work is needed
50-gallon gas tank	$1,100 – $2,200	Most common size for 3-4 person households
Tankless (electric)	$1,000 – $3,000	Lower install cost than gas tankless
Tankless (gas)	$1,800 – $5,600	May require new venting and gas line upsizing

What's included in that price

For a standard tank replacement, the unit itself typically runs $400-$600 for a basic 40-gallon gas tank, with labor making up 20% to 50% of the total — usually $140 to $1,150. Plumbers generally charge $45 to $200 per hour, and a standard swap takes 2 to 4 hours if the new unit matches the old one's location, fuel type, and venting.

Costs climb when the new unit needs:

A larger tank than your existing space or venting was built for
Conversion from electric to gas (or vice versa)
Code-required upgrades — expansion tanks, seismic strapping, updated venting — that weren't required when the old unit was installed
Removal and disposal of the old unit (often a separate line item)

Tank vs. tankless

A tank system costs less upfront but has a shorter lifespan (typically 10-15 years) and constantly heats a reservoir of water, even when you're not home. A tankless unit costs more to install but lasts 20+ years and only heats water on demand. See the full head-to-head, including operating-cost differences, in Tankless vs Tank Water Heater Cost.

If your water heater failure is actually a leak reaching your slab or foundation rather than the tank itself, see How Much Does It Cost to Fix a Slab Leak?

Prices on this page are researched ranges compiled from multiple public contractor-pricing sources, not quotes from us or a guarantee of what you will pay. Actual costs vary by region, material choice, and job complexity — always get itemized quotes from licensed local contractors before committing to a project. See How We Price for our sourcing methodology.

Frequently Asked Questions

How long does a water heater installation take?: A straightforward tank swap in the same location typically takes 2 to 4 hours. Tankless installs, gas-to-electric conversions, or jobs requiring new venting can take a full day or longer.
Should I repair or replace my water heater?: If your tank is leaking from the tank body itself (not a fitting) or is more than 8-10 years old, replacement is usually more cost-effective than repair. Fitting leaks, thermostat issues, and heating element failures on newer units are often worth repairing first.
Do I need a permit to replace a water heater?: Most jurisdictions require a permit for water heater replacement, especially for gas units or any change in venting. A licensed plumber will typically pull the permit as part of the installation price — confirm this is included in your quote.
Why do gas water heaters cost more to install than electric?: Gas units require venting to the exterior and a gas line connection, both of which add labor and material cost. Electric units only need an electrical connection, which is typically simpler and cheaper to install or modify.

HomeRepairPrice Editorial Team

Our editorial team researches and cross-checks every price range against multiple contractor-facing sources (see our How We Price methodology) before publication. We are not a contracting company and do not sell leads, materials, or services.

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