How much does a tankless water heater cost?
Tankless water heater installation runs $1,800 for a basic gas point-of-use unit, $3,500 for a typical whole-house condensing tankless install, and $6,500+ for high-flow models requiring gas-line upsizing or 240V electrical.
Quick price points (2026)
| Scope | Cost | What it includes |
|---|---|---|
| Low | $1,800 | installed |
| Typical | $3,500 | installed |
| High | $6,500 | installed |
How to budget for this project
- Get 3 quotes
Get itemized quotes from at least three licensed contractors in your area.
- Adjust for your region
Compare the same scope and account for regional labor and permitting.
- Add 10–15% contingency
Hidden conditions, code upgrades and permit fees can increase the original quote.
- Plan the cash, not the financing
Build the replacement cost into the home's repair plan before the work becomes an emergency.