Over the past year, half of our customers paid between $5,100 and $7,000 for an electric tankless water heater, and between $6,500 and $7,850 for a gas tankless water heater. These totals include installation, removing the old heater, and the electrical and permit work billed for the job.
The numbers below come from our own invoices and our current price book.
What our customers paid
Each range is the middle half of our jobs: half of our customers paid within it, a quarter paid less and a quarter paid more. These are whole-job totals from our invoices dated November 1, 2025 to October 31, 2026, including add-ons, permits and any discounts on the job, rounded to the nearest $50.
| Tankless water heater | Jobs | Typical range |
|---|---|---|
| Electric, whole home | 47 | $5,100 to $7,000 |
| Natural gas | 32 | $6,500 to $7,850 |
Today’s prices for common options
From our price book on November 2, 2026. Each price includes removing your old heater and installing the new one with an isolation valve kit for flushing. Electrical work for an electric unit is not included unless your estimate lists it.
| Tankless water heater | Price |
|---|---|
| Electric, for 1 bathroom | $5,189 |
| Electric, 24 kW, for 1 to 3 bathrooms | $5,376 |
| Electric, for 1 to 4 bathrooms | $6,076 |
| Gas, Navien NPE-210A | $6,962 |
| Gas, Navien NPE-240A | $7,586 |
| Single-fixture electric unit (one sink) | $1,198 |
Add-ons, only when your home needs them:
| Add-on | Price |
|---|---|
| Electrical setup for an electric tankless (new circuits) | $1,002, plus wire by the foot for long runs |
| Permit, when required | $275 |
| Tankless flush | $252 |
| Optional extended warranty, 10 years | $877 |
What changes the price
- Electric or gas. In our data, electric installs cost less than gas installs.
- Your electrical panel. Electric tankless heaters need a lot of power. Our 24 kW unit needs two 50 amp double-pole breakers and at least 100 amps of capacity. Most of the electric tankless installs we did last year (34 of 53) also needed the electrical setup above. If your panel is full or too small, see our electrical panel cost guide.
- Size. Units are sized by how many showers and faucets you run at the same time.
- Gas line and venting. A gas unit needs a gas line big enough to feed it and a vent to the outside.
- Permit. If your job needs one, it is listed as its own line on your estimate.
Tankless or tank?
A tankless heater costs more to install than a standard tank. Half of our customers paid $2,250 to $2,900 for a standard 30 to 50 gallon electric tank (see our water heater cost guide). A tankless heater heats water as you use it, so a correctly sized unit does not run out of hot water, and it takes up less space. Your technician can price both so you can compare.
Already have a tankless heater? Common service in our current price book: tankless flush $252, tankless repair from $718.
Southwest Florida factors
- Hard water. Minerals in our water build up as scale inside a tankless heater. Regular flushing keeps it working well. Ask your technician how often your unit needs it.
- Hurricane season and power outages. Both electric and gas tankless heaters need electricity to run, so neither makes hot water during a power outage unless you have backup power.
- Slab homes. Homes here are usually built on a concrete slab, so the heater goes in a garage, closet or utility room, and the location affects the gas, vent and electrical work.
- Permits. Collier County, Lee County and cities like Naples, Fort Myers, Cape Coral and Bonita Springs run their own permits and inspections.
How to get an exact price
Call (239) 215-3330 or send us a message. A technician will look at your current heater, your electrical panel or gas line, and show you your options and prices before any work starts. Financing is available with approved credit.
More about our tankless water heater services, water heater services and how our pricing works.
Frequently asked questions
How much does it cost to install a tankless water heater in Southwest Florida?
Half of our customers paid between $5,100 and $7,000 for an electric tankless water heater and between $6,500 and $7,850 for a gas one, from November 2025 to October 2026, including the electrical and permit work billed for the job.
Will I need electrical work for an electric tankless heater?
Often, yes. Electric tankless heaters need large circuits. Most of the electric tankless installs we did last year also needed an electrical setup, which is $1,002 in our current price book, plus wire by the foot for long runs.
Does a tankless water heater work during a power outage?
No. Both electric and gas tankless heaters need electricity to run.
What maintenance does a tankless heater need?
Flushing removes mineral scale from hard water. A tankless flush is $252 in our current price book.
Do you offer financing?
Yes, with approved credit. See our financing options.
Prices on this page were last checked on November 2, 2026.