Water Heater Replacement Cost
Reviewed 2026-07-30
Typical range
$1,200 – $6,500
National average
$2,400
Water Heater Replacement cost breakdown
| Line item | DIY cost | Professional cost |
|---|---|---|
| Standard 40-50 gallon tank water heater, gas, like-for-like install | $500 – $900 in unit cost, not recommended for gas lines | $1,200 – $2,200 |
| Standard 40-50 gallon tank water heater, electric, like-for-like install | $450 – $800 in unit cost | $1,000 – $2,000 |
| Tankless water heater installation (gas) | Not recommended — requires gas line and venting work | $3,000 – $6,500 |
| Heat pump water heater installation | Not recommended | $2,800 – $5,500 |
| Code upgrade (expansion tank, venting, permit) | $50 – $150 in parts | $300 – $900 |
| Old unit removal and disposal | $0 if self-hauled to disposal facility | $75 – $200 |
What pushes water heater replacement cost up
- Switching from tank to tankless, requiring new gas line sizing and venting
- Converting from electric to gas or vice versa
- Code-required upgrades like expansion tanks or updated venting not present on the old unit
- Difficult access such as an attic or tight closet installation
- Larger capacity units for bigger households
- Permit and inspection requirements in the local jurisdiction
- Emergency same-day replacement after a failure
What brings water heater replacement cost down
- Direct like-for-like replacement in the same location and fuel type
- Easy access in a garage or basement
- No code upgrades needed because the existing setup already complies
- Standard-capacity tank unit rather than tankless or heat pump
- Scheduling in advance rather than as an emergency replacement
Water Heater Replacement diagnostic and emergency fees
$75 – $150 for a service call to assess the failed unit, often waived when you book the replacement
Same-day emergency replacement after a failure or leak typically adds $200-$500 over a scheduled installation.
Questions to ask before you approve water heater replacement work
- Is this a like-for-like replacement or does it require code upgrades?
- What size and type of unit is right for my household's hot water demand?
- Is a permit and inspection included in the price?
- What is the manufacturer's warranty versus the installer's labor warranty?
- Will you haul away and dispose of the old unit?
- For tankless, is my existing gas line and venting adequate, or does that add cost?
Water Heater Replacement cost questions
Is a tankless water heater worth the extra upfront cost?
Tankless units cost $1,500-$4,000 more upfront than a standard tank but use 24-34% less energy for households using under 41 gallons of hot water daily, according to Department of Energy estimates, and typically last 20 years versus 10-15 for tank units.
How long does water heater installation take?
A like-for-like tank replacement typically takes 2-3 hours. Switching fuel types, installing tankless, or adding code-required upgrades can extend the job to a full day.
Should I repair or replace an old water heater?
If the unit is over 8-10 years old and needs a repair costing more than half the price of replacement, most plumbers recommend replacing it, since tank units have a typical service life of 10-15 years.
Problems water heater replacement solves
- Why Is My House Getting No Hot Water?
- Why Is My House Getting a Water Heater That Leaks?
- Why Is My House Water Pressure Low?
Sources for these water heater replacement costs
- U.S. Department of Energy, water heater efficiency guidance
- U.S. Bureau of Labor Statistics, Producer Price Index for residential repair
- International Association of Plumbing and Mechanical Officials, code guidance