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How much does gas tankless water heater installation cost in 2026?

Updated September 2026 · national figures from 4 published cost guides

Across the U.S., a licensed plumber typically charges $1,000 to $5,600 to install a gas tankless water heater in place of a tank, with most jobs landing near $2,800. Prices run higher in high-wage states and metros and lower in rural areas — pick your state below for a local range.

Low end

$1,000

Most jobs

$2,800

High end

$5,600

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What a quote means (national)

Quote for this job	What it means
Under $600	Suspiciously low — ask what is excluded, and check licensing and insurance
$600 – $6,160	Fair price — inside the typical range (up to 10% over the top is still normal)
$6,160 – $9,800	Running high — get the quote itemized, and get a second one
Over $9,800	Ripoff territory — more than 1.75× the high end of the typical range

Same rules the QuoteJury checker uses on every quote.

What you're paying for

What is usually included: The tankless unit, new stainless venting, gas line upsizing if needed, isolation valves, condensate drain, removal of the old tank, permit, and 4–8 hours of labor.

What moves the price:

Gas line size — most tanks run on a 1/2-inch line and tankless units often need 3/4-inch, which can add $500–$1,500
Venting: condensing units use cheaper PVC venting than non-condensing stainless
Unit size (GPM) matched to the number of bathrooms
Electrical outlet needed near the unit, and a recirculation pump if requested
Permit and inspection

Whether the gas line and venting must be upsized/rerouted (biggest swing), BTU capacity, condensing vs non-condensing unit, electrical outlet for the unit, permit, and old tank removal.

Gas tankless water heater installation cost by state

Typical range for each state, adjusted with BLS wage data for plumbers. Index 1.00 = national average.

State	Typical range	Most jobs	Index
Alabama	$930 – $5,200	$2,600	0.93
Alaska	$1,300 – $7,300	$3,700	1.31
Arizona	$980 – $5,500	$2,750	0.98
Arkansas	$830 – $4,650	$2,350	0.83
California	$1,100 – $6,200	$3,150	1.11
Colorado	$1,050 – $5,800	$2,900	1.04
Connecticut	$1,150 – $6,500	$3,250	1.16
Delaware	$1,000 – $5,700	$2,850	1.01
District of Columbia	$1,500 – $8,500	$4,250	1.52
Florida	$890 – $5,000	$2,500	0.89
Georgia	$930 – $5,200	$2,600	0.93
Hawaii	$1,150 – $6,400	$3,250	1.15
Idaho	$890 – $4,950	$2,500	0.89
Illinois	$1,300 – $7,400	$3,700	1.32
Indiana	$1,100 – $6,100	$3,050	1.09
Iowa	$990 – $5,500	$2,800	0.99
Kansas	$1,000 – $5,600	$2,800	1.00
Kentucky	$980 – $5,500	$2,750	0.98
Louisiana	$970 – $5,400	$2,750	0.97
Maine	$1,000 – $5,600	$2,800	1.00
Maryland	$1,050 – $5,900	$2,950	1.06
Massachusetts	$1,300 – $7,400	$3,700	1.32
Michigan	$1,150 – $6,300	$3,200	1.13
Minnesota	$1,300 – $7,200	$3,650	1.29
Mississippi	$880 – $4,900	$2,450	0.88
Missouri	$1,000 – $5,700	$2,850	1.01
Montana	$1,150 – $6,300	$3,150	1.13
Nebraska	$970 – $5,400	$2,700	0.97
Nevada	$970 – $5,400	$2,700	0.96
New Hampshire	$1,050 – $5,900	$2,950	1.05
New Jersey	$1,150 – $6,500	$3,250	1.16
New Mexico	$960 – $5,400	$2,700	0.96
New York	$1,150 – $6,500	$3,250	1.16
North Carolina	$930 – $5,200	$2,600	0.93
North Dakota	$1,000 – $5,600	$2,800	1.00
Ohio	$990 – $5,500	$2,800	0.99
Oklahoma	$920 – $5,200	$2,600	0.92
Oregon	$1,300 – $7,400	$3,700	1.32
Pennsylvania	$1,050 – $5,800	$2,900	1.03
Rhode Island	$1,150 – $6,400	$3,200	1.14
South Carolina	$890 – $5,000	$2,500	0.89
South Dakota	$880 – $4,900	$2,450	0.88
Tennessee	$940 – $5,300	$2,650	0.94
Texas	$950 – $5,300	$2,700	0.95
Utah	$980 – $5,500	$2,750	0.98
Vermont	$1,000 – $5,700	$2,850	1.01
Virginia	$990 – $5,600	$2,800	0.99
Washington	$1,200 – $6,800	$3,400	1.21
West Virginia	$910 – $5,100	$2,550	0.91
Wisconsin	$1,150 – $6,400	$3,200	1.15
Wyoming	$990 – $5,500	$2,750	0.98

Frequently asked

Is $2,800 a fair price for gas tankless water heater installation in the U.S.?

Yes. $2,800 is right around what most homeowners in the U.S. pay. Anything from $600 to $6,160 is inside the normal range for a licensed plumber; above $6,160 it is worth getting a second quote.

Why do quotes for the same job vary so much?

Gas line size — most tanks run on a 1/2-inch line and tankless units often need 3/4-inch, which can add $500–$1,500. Venting: condensing units use cheaper PVC venting than non-condensing stainless. Company overhead matters too: a large company with trucks, dispatchers and a warranty department charges more than a one-person shop, and both can be honest prices.

When should I get a second quote?

Any time a quote lands above $6,160, or when the contractor cannot break it into parts, labor and fees. Ask for the itemized version, ask what would change the price, and confirm licensing and insurance. You can also paste the quote into the free QuoteJury checker for an instant second opinion.

Other plumbing jobs

Sources

HomeGuide (2026): $2,100–$5,600 nationally
Fixr (2025): $2,500–$4,500 nationally
Angi (2026): $1,400–$3,900 nationally
Forbes Home (2025): $1,000–$3,500 nationally
U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics, May 2025 — median hourly wages by state and metro area

About these numbers. Ranges are typical market rates for a licensed, insured contractor, blended from published U.S. cost guides and adjusted with U.S. Bureau of Labor Statistics wage data (OEWS, May 2025) for each state and metro area. They are estimates, not a bid, appraisal or inspection. Real prices move with parts, access, permits and code requirements. The quote checker is AI-powered and labeled as such.