Gas tankless water heater replacement cost in Atlanta, GA
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 Atlanta area, 2% below the national figure, because plumbers here earn a median $28 an hour against $31 nationally.
Prices by size in Atlanta
| Size | Low | Typical | High | National typical |
|---|---|---|---|---|
| About 150,000 BTU (1–2 bathrooms) | $2,000 | $2,600 | $3,300 | $2,650 |
| About 180,000–199,000 BTU (2–3+ bathrooms) | $2,550 | $2,750 | $3,650 | $2,800 |
Local labor: what plumbers earn here
| Hourly wage | Atlanta metro | United States |
|---|---|---|
| 25th percentile | $22 | $24 |
| Median | $28 | $31 |
| 75th percentile | $35 | $41 |
The Atlanta market
The City of Atlanta Office of Buildings lists replacing a water heater as plumbing permit work. For existing one- and two-family homes, its exempt list includes repair or replacement of existing air conditioner condensers, but only repair of existing furnaces, so a full furnace replacement is unclear and worth a call. Heat pumps are not addressed. A Georgia-licensed plumbing contractor or the legal owner (signing a homeowner affidavit) may apply, and an adult must be home to let the inspector in. The trade permit form lists $40 per heating system and $40 per cooling system up to 5 tons, plus a $150 minimum base fee whose application to single-family homes is not confirmed. Cooling dominates: EIA counts central air in 86% of Georgia homes and heat pumps as main heat in 27%. Sandy Springs, Roswell, DeKalb and Cobb run separate permit offices.
Gas heats water in 38% of Georgia homes, so a gas tankless unit often starts with a basic question. Is there gas at the house at all? Where there is, the new unit usually needs its own vent and a larger gas supply than the old tank used. An electric tankless model draws far more current than a tank, which can mean panel work. Ask the installer what flow rate the unit delivers with two showers running, and get every added line item on the quote.
Permits in Atlanta
| Permit for this job | Yes (source) |
|---|---|
| Fee | Trade permit application (Rev 11/17): $150 minimum base permitting fee; heating system up to 500,000 (per system) $40; cooling system up to 5 tons $40. No water heater line found. |
| Who can pull it | Georgia-licensed plumbing contractor or legal owner of the property (owner doing the work signs a homeowner affidavit) |
| Inspection | Yes (plumbing): contractor or homeowner requests inspection when work is ready |
Rebates in Georgia
HEAR: paused. HOMES: open. Source: Georgia Environmental Finance Authority (GEFA), checked October 13, 2026.
What these programs cover, and other states
Other systems in Atlanta
- Gas tank water heater
- Gas furnace
- Central air conditioner
- Heat pump (ducted, outdoor unit + air handler)
Gas tankless water heater cost in other metros
Sources
- City of Atlanta plumbing permit guidance (Web.PPA)
- City of Atlanta: work exempt from permits (HVAC/mechanical)
- City of Atlanta trade permit application
- Georgia Energy Rebates: HEAR program updates
- EIA, 2020 RECS: Highlights for space heating in U.S. homes by state
- EIA, 2020 RECS: Highlights for water heating in U.S. homes by state
- EIA, 2020 RECS: Highlights for air conditioning in U.S. homes by state
- https://www.atlantaga.gov/residents/city-hall/online-services/apply-for-a-technical-permit
- BLS OEWS May 2025, Atlanta-Sandy Springs-Roswell, GA (47-2152 plumbers)
- DOE Gas-fired Instantaneous Water Heaters Final Rule TSD (Dec 2024), Table 8.2.6 (2023$)