How Much Does Tankless Water Heater Installation Cost?
Average cost: $1,800 | Range: $800 – $3,500
Average Cost
$1,800
Low End
$800
High End
$3,500
Time Required
4-8 hours
What Affects the Price?
Gas tankless units typically cost more to install than electric due to venting and gas line requirements. Whole-house units cost significantly more than point-of-use units. Permit fees vary by city.
Key Cost Factors
- Unit size
- Gas vs electric
- Venting requirements
- Permit fees
- Existing lines
DIY vs. Professional
DIY
This service requires a licensed plumber. DIY attempts risk additional damage or safety hazards.
Professional
Licensed plumbers ensure code compliance, warranties on work, and liability coverage.
Cost: $800 – $3,500
Cost by State (Sample)
| State | Low | High | Avg |
|---|---|---|---|
| Alabama | $704 | $3,080 | $1,584 |
| Alaska | $1,080 | $4,725 | $2,430 |
| Arizona | $776 | $3,395 | $1,746 |
| Arkansas | $680 | $2,975 | $1,530 |
| California | $1,160 | $5,075 | $2,610 |
| Colorado | $880 | $3,850 | $1,980 |
| Connecticut | $1,000 | $4,375 | $2,250 |
| Delaware | $864 | $3,780 | $1,944 |
| Florida | $816 | $3,570 | $1,836 |
| Georgia | $760 | $3,325 | $1,710 |
Frequently Asked Questions
Always Get 3 Quotes
Plumbing prices vary by 20–50% between contractors. Getting multiple quotes is the single best way to avoid overpaying.
How to Find a Good Plumber →Home Warranty Coverage
A home warranty may cover tankless water heater installation for a flat service fee instead of the full repair cost.
Compare Warranties