Open 24/7 for emergencies
A new water heater installed with the permit runs $2,757 to $5,493 for an electric tank, $3,379 to $5,485 for gas or propane and $8,886 to $10,486 for tankless.
Price range
$2,757-$5,493
8yrs @ 7.99%
$39/mo
15yrs @ 9.99%
$30/mo
Monthly figures on the starting price, the whole price financed, on approved credit. The lender sets the final terms. How financing works
Get your price in writing
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Water heaters in Vienna, town and county side, repaired or replaced with the Fairfax County permit and the expansion tank already in the price. The water heater estimator gives your exact number.
5.0 stars across 1,132 reviews
Two of our plumbers wheeling a new water heater up a Northern Virginia walkway, the van at the curb.
Licensed and insuredVirginia Class A contractor #2705192276
24/7 emergency serviceOften same-day, and we will tell you honestly when we can get there.
Our own plumbers, our own trucksNobody here is a subcontractor with a magnet on the door
The price is settled before the workYou see the number in writing before anything is taken apart
What it costs
Installed, from our water heater estimator, which is the price book. Everything is in the number: the permit and the inspection, the expansion tank, the drain pan, hauling the old one away, and the labor.
Electric tank, installed
$2,757 to $5,493
or $46/mo at 0% APR for 60 months
Gas or propane tank, installed
$3,379 to $5,485
or $56/mo at 0% APR for 60 months
Power vent tank, installed
$5,957 to $7,494
or $99/mo at 0% APR for 60 months
Tankless, installed
$8,886 to $10,486
or $148/mo at 0% APR for 60 months
Monthly figures: 60mo @ 0% APR on each starting price, the whole price financed, on approved credit. Longer plans lower the payment and cost more in total. The lender sets the final terms. How financing works
How the house vents picks the row; where you land inside it is the tank size and the warranty. A hybrid heat pump water heater is quoted at the visit, never from a page.
Keeping the one you have? A yearly water heater flush slows the sediment down: $99 right now, normally $199. A tankless descale is $300, regularly $350. Or get the flush every year with Comfort+ membership, $199 a year, along with a dryer vent cleaning, a sewer camera inspection and heating and cooling maintenance visits.
What’s different in Vienna
About eight in ten owner homes inside the Town of Vienna heat with gas, and in the houses built before 1980, about two thirds of the town, the water heater is usually a gas tank in the basement or utility room beside the furnace, sharing its chimney and long past the one the house started with. If a storm ever puts water on that basement floor high enough to reach the burner, leave the heater off and call us to check it before it’s relit.
The water inside the town is the Town of Vienna’s, a blend it buys from Fairfax Water and the Washington Aqueduct, and its 2025 report calls it moderately hard to hard at 5 to 10 grains per gallon. Where the bill comes straight from Fairfax Water, its 2025 figures ran 3 to 10.8 grains per gallon. Either way that’s enough calcium to lay sediment on the bottom of a tank every year, and it’s what you hear rumbling when the burner fires under it.
The houses built since 2000, about a quarter of the town’s, ask more of a water heater: more bathrooms, a big tub, sometimes two tanks or a tankless unit. A tankless in this water wants descaling on a schedule, $300 for the descale right now, regularly $350, and a new one runs $8,886 to $10,486 installed.
On the county side, Wolf Trap is nearly all single-family houses with a 1980 median, most of them heated with gas, so the tank there is rarely the first one the house had. On Fairfax Water the pressure past the meter is the owner’s to manage, and a high reading is hard on a tank’s relief valve and fittings, which is one reason every replacement we price includes an expansion tank.
Neighborhood by neighborhood
Census figures for each place, and the water heater that usually goes with its houses. Median year built and heat count owner-occupied homes only.
| Place | Median home built | Most homes are | Heated with | The water heater you usually find |
|---|---|---|---|---|
| Wolf Trap | 1980 | single-family houses, nearly all | gas, about 7 in 10 | Gas tanks on their second or third replacement. |
| Vienna | 1972 | single-family houses, about 8 in 10 | gas, about 8 in 10 | Gas tanks, often sharing a chimney with the furnace. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Nearly the whole town sits in 22180, which it shares with county streets toward Dunn Loring and Merrifield.
Vienna mail outside the town line: Wolf Trap and the Tysons edge in 22182, the Oakton side of 22181, Dunn Loring. The figures are Wolf Trap’s, the biggest piece.
What you’d notice
In an older Vienna house where the furnace went high-efficiency and now vents out the side, the gas water heater may be the last thing using the chimney. If its draft hood spills warm air, get the flue looked at before a new tank goes on it.
On a gas tank that’s usually the thermocouple or the gas valve, both repairs. A burner that lights but smells of exhaust is different: shut it off and call.
A drip from a valve can be fixed. Water from the tank itself can’t; once the lining goes, the only fix is a new heater, and sooner beats later.
If the basement took water
A water heater usually sits on the lowest floor of the house, so it’s one of the first things standing water reaches. Three checks, then call us.
Leave it off and don’t relight it. The warning label on a gas water heater says not to use it if any part has been under water, and to have a service technician replace the gas control.
Shut its breaker off at the panel, but only from somewhere dry. The elements and the thermostats get checked before it heats again.
Mop it up and look again in an hour. Water that comes back with no rain is the tank or a valve, not the storm.
Call us after a storm and we’ll check it: the gas control or the elements, the burner, the venting and the drain pan. If it has to be replaced, you get the price in writing before anything comes out.
Permits and pressure
Inside the Town of Vienna, Fairfax County is the building official, so a gas water heater or furnace swap in town takes a Fairfax County permit, even like for like, and the county page adds that work in the town can need the Town’s own sign-off too. Source.
Virginia lets emergency replacement work start first, with the permit application in by the end of the next working day. Source.
Fairfax Water promises 20 psi at the main and no uniform pressure, and the pressure reducing valve on your side of the meter is yours to buy and keep up. Over 80 psi, the Virginia Residential Code calls for one, and an expansion tank with it. Source.
Our Virginia Class A contractor license, 2705192276, is on the side of the van.
Choosing who installs it
Questions worth asking anybody who quotes you, us included.
An older Vienna house with a finished basement bath or an addition may need more tank than it started with. A good installer asks how many showers run at once now before sizing the new one.
A gas water heater always needs a permit, an electric one often does, and skipping it tends to surface when the house sells. Ask whether the quote includes it and the inspection.
Most houses here have a check valve or a pressure reducer on the incoming line, so the heated water has nowhere to go. An expansion tank gives it somewhere, and leaving it out is how quotes come in low.
A thermocouple, an element or a valve is a repair, not a new heater. A good plumber says so, and saves the replacement talk for a leaking tank.
Two of our crew going over a work order before the day's calls.
From our Google reviews
5.0 stars across 1,132 reviews. Read them on our reviews page.
Moises and Oscar responded quickly to our need for a new water heater. They came through with a quick and a professional install at a reasonable price. I trust Tyler, Moises, and the team at SwiftPro with my hvac and plumbing needs.
Where we work
Next door to Vienna: Dunn Loring, Oakton, McLean, Fairfax and Reston.
Questions
For a gas one, yes, and it comes from Fairfax County, which serves as the Town’s building official. The county also wants a chimney vent certification with any fuel-burning appliance. An electric one can need a permit too: the county lists the direct replacement of a water heater among the jobs that take one. Ours include the permit wherever one’s needed.
The label gives the build date. Most tanks in water this hard last a little over a decade, less if nobody has ever drained the sediment. If yours is past twelve and rumbling, get the replacement price before it picks the day: a gas tank on the flue you have runs $3,379 to $5,485 installed.
It depends on the gas line and where it can vent. A big house with three full baths is where tankless earns its keep, because it doesn’t run out mid-shower; a tank is cheaper to put in, $2,757 to $7,494 against $8,886 to $10,486. We look at the gas meter and the vent path before pricing either.
Installed, with the permit, the expansion tank, the pan and the haul-away: an electric tank $2,757 to $5,493, a gas or propane tank on the flue you have $3,379 to $5,485, a power vent tank $5,957 to $7,494, and a tankless unit $8,886 to $10,486. The estimator gives your exact number in about a minute.
Ready when you are
Call, or send the form at the top. The age on the label and what it’s doing tell us most of what we need, and you get the price before anything comes out.
SwiftPro Heating, Cooling & Plumbing
4230 Lafayette Center Dr N, Chantilly, VA 20151
44679 Endicott Dr, Suite 211, Ashburn, VA 20147
Virginia Class A contractor license #2705192276
SwiftPro Heating, Cooling & Plumbing is a licensed, BBB Accredited (A rating), independently owned heating, cooling and plumbing company in Chantilly, serving Vienna and the rest of Northern Virginia. Virginia contractor license #2705192276. 5.0 stars across 1,132 reviews on Google, Angi, Yelp, the BBB and Facebook. SwiftPro maintains a dedicated HVAC team and a dedicated plumbing team.
From SwiftPro Heating, Cooling & Plumbing in Chantilly. Housing figures are the Census Bureau’s American Community Survey, 2020 to 2024, for each place named; permit, water and sewer facts link to each office’s own page and were checked in September and October 2026.