Gas tankless water heater replacement cost in Jacksonville, FL
Installed, About 180,000–199,000 BTU (2–3+ bathrooms)
A typical tankless water heater (About 180,000–199,000 BTU (2–3+ bathrooms)) costs about $2,750 installed in the Jacksonville area, 2% below the national figure, because plumbers here earn a median $28 an hour against $31 nationally.
Prices by size in Jacksonville
| Size | Low | Typical | High | National typical |
|---|---|---|---|---|
| About 150,000 BTU (1–2 bathrooms) | $2,000 | $2,600 | $3,200 | $2,650 |
| About 180,000–199,000 BTU (2–3+ bathrooms) | $2,550 | $2,750 | $3,550 | $2,800 |
Local labor: what plumbers earn here
| Hourly wage | Jacksonville metro | United States |
|---|---|---|
| 25th percentile | $23 | $24 |
| Median | $28 | $31 |
| 75th percentile | $31 | $41 |
The Jacksonville market
Jacksonville's Building Inspection Division exempts only small plumbing swaps such as faucets, and its exemption list expressly excludes water heaters, so a water heater replacement needs a permit. For HVAC, only replacing a part inside a single piece of equipment is exempt. Homeowners can pull permits in person at 214 N. Hogan St., Room 280, and any contractor you hire must pull their own trade permit. Fees were not confirmed. Under Florida Statute 553.80(3)(b), owners replacing electric HVAC equipment in a one- or two-family home can request an inspection exemption when the total cost stays under $5,000; the notarized form has no fee. DOE puts Duval County in hot-humid climate zone 2A, and EIA's 2020 survey found 90% of Florida homes have central air and 66% heat with electricity.
Gas reaches only about one in ten Florida water heaters, so a gas tankless unit in Jacksonville usually means the home already has gas or propane. An electric tankless model needs large dedicated circuits, which often requires panel work by a licensed electrician. Warm incoming water for much of the year helps tankless output here. Ask the installer how many amps the unit draws and whether your electrical service can carry it.
Permits in Jacksonville
| Permit for this job | Yes (water heaters are expressly excluded from the plumbing permit exemption) (source) |
|---|---|
| Fee | Not stated on the city pages we checked |
| Who can pull it | Homeowner (in person) or contractor; contractors hired by a homeowner must pull their own trade permits |
| Inspection | Yes (but property owner may request an inspection exemption for electric 1-2 family HVAC replacement under $5,000) |
Rebates in Florida
HEAR: status unclear. HOMES: status unclear. Source: FDACS Office of Energy, checked October 13, 2026.
What these programs cover, and other states
Other systems in Jacksonville
- Gas tank water heater
- Gas furnace
- Central air conditioner
- Heat pump (ducted, outdoor unit + air handler)
Gas tankless water heater cost in other metros
Sources
- Jacksonville, FL permit source (water heater permit)
- Jacksonville, FL permit source (inspection)
- Jacksonville, FL permit source: Lists the HVAC inspection exemption
- Jacksonville, FL permit source: Contains Mechanical and Plumbing Permit Fees sections (not
- DOE Building America: Guide to Determining Climate Regions by County
- EIA RECS 2020: Highlights for space heating fuel in U.S. homes by state
- EIA RECS 2020: Highlights for space heating in U.S. homes by state
- EIA RECS 2020: Highlights for air conditioning in U.S. homes by state
- EIA RECS 2020: Highlights for water heating in U.S. homes by state
- BLS OEWS May 2025, Jacksonville, FL (47-2152 plumbers)
- DOE Gas-fired Instantaneous Water Heaters Final Rule TSD (Dec 2024), Table 8.2.6 (2023$)