Open 24/7 for emergencies
A new gas water heater in Dunn Loring runs $3,379 to $5,485 installed, with the Fairfax County permit. Most 22027 houses heat with gas.
Price range
$3,379-$5,485
8yrs @ 7.99%
$48/mo
15yrs @ 9.99%
$36/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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Rather talk now? (703) 997-9757
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 Dunn Loring
About seven owner homes in ten in Dunn Loring’s 22027 heat with natural gas, and in a detached house built around 1991, the typical one here, the water heater is usually a gas tank in the basement a few feet from the furnace. Most tanks give out somewhere past ten years, so a house that age is likely on its second or third. The couple of owners in a hundred on propane get the same row as gas.
The water it heats is hard. All of 22027 sits in Fairfax Water’s Washington Aqueduct zone, Potomac water the Aqueduct’s 2025 report puts at 5.6 to 10.9 grains per gallon, and the college-named streets off Cottage Street buy Town of Vienna water at 5 to 10. That calcium settles on the bottom of the tank. A yearly flush, $99 right now, slows that down; it can’t undo fifteen years of it.
Most of the storm reports NOAA files under Dunn Loring are wind. Tropical Storm Irene knocked out about 81,000 Fairfax County customers in 2011, with Merrifield, just across I-66, among the hardest-hit spots, and the June 2012 derecho dropped big limbs across Prosperity Avenue here. A standard gas tank on a chimney usually keeps making hot water through an outage. A power vent tank, $5,957 to $7,494 installed, and a tankless unit both need electricity to run.
Look at the pipes on top of the old tank too. Some 1980s and 90s houses here were plumbed in gray polybutylene, and where it comes up to the heater, the written price says what it takes to change those connections. The label gives the year the tank was made; on gas in this water, past twelve is where we’d start pricing the replacement.
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
ZIP 22027 as a whole: every Dunn Loring address. The Dunn Loring Census place is bigger: about three in four of its homes have Vienna mail.
What you’d notice
In the late January 2026 cold, wind chills ran 0 to 10 below across the Piedmont, and the water reaching tanks was about as cold as it gets. A tank with a thick sediment layer, or a gas burner that’s worn, is the first to come up short. It can be a repair; a leak from the tank itself never is.
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
Fairfax County requires a permit to replace any gas appliance, even like for like: a gas water heater, furnace or boiler. Replacing a fuel-burning appliance also needs a chimney vent certification. 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.
A standard gas tank on a chimney keeps working when the lights go out; a power vent tank or a tankless unit doesn’t. Ask the installer which kind the quote is for and what it does in an outage.
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.
Had the water heater replaced and a quote for my HVAC. Both technicians were friendly and helpful. Prices were decent. Would use again.
Where we work
Next door to Dunn Loring: Vienna, Falls Church, McLean, Annandale and Oakton.
Questions
Fairfax County, whatever the envelope says. Dunn Loring has no town government, and Vienna mail doesn’t move a house into the Town of Vienna. The county wants a permit even for a like-for-like gas tank, and our installed prices have it in the number.
A tank is the simpler swap, $2,757 to $7,494 installed, and a standard gas one rides out an outage. A tankless, $8,886 to $10,486 installed, never runs out mid-shower, but it needs power, a big enough gas line and descaling on this water, $300 right now.
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 Dunn Loring 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.