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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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Gas and electric water heaters across Gainesville, Virginia Oaks and Heritage Hunt, fixed or replaced at a published price, county permit counted. 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 Gainesville
Gainesville went up in two big pushes. In the part of 20155 the Census counts as Gainesville, about four in ten owner homes were built in the 2000s and about three in ten in the 2010s, with nearly one in ten more since 2020. So the first wave of tanks is at the end of its run, and the second is mostly ten to fifteen years old, the age when the label is worth reading before you pay for a part.
Gas heats about eight in ten owner homes here, and in most of them the water heater burns gas too. Going tankless is where Prince William County adds a step people don’t see coming: its policy calls for a pressure test on the new gas line, not just a final look, whenever the piping or its venting will be hidden or the run has more than 12 joints. In a house with a finished basement, a line above the drywall counts as hidden, so plan on the test and the county’s certified gas piping diagram.
Virginia Oaks has its own say about what shows on the roof. Its association’s design guidelines let you replace a metal flue without an application, as long as it stays on the back of the roof or the side least seen from the street and matches the roof or trim color where it can. A gas tank set back on the flue it already has stays inside that rule. A tankless that would exhaust somewhere new is worth raising with the association before you settle on a model.
Heritage Hunt is the part of 20155 the Census figures miss: it sits just outside the line the Census draws around Gainesville. Zoned in 1997, it runs from condominiums to five-bedroom houses, more than 30 models in all, so there’s no single typical water heater there; tell us which kind of home you have when you book. In its four condominiums, check the association’s documents for who owns the heater and the pipe it hangs on.
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
What you’d notice
With a pressure reducing valve at the meter, which houses this young usually have, heated water has nowhere to expand. If the expansion tank beside the heater has lost its air charge, the relief valve on the tank lets the pressure go a little at a time. Caught early it’s a small fix; ignored, it’s a wet floor and a tired tank.
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
Prince William County requires a permit to replace a gas or propane furnace or a gas appliance such as a water heater, even like for like. Replacing an electric water heater with one the same size in the same spot needs no permit. Source.
A burst tank doesn’t wait on paperwork: under Virginia’s building code the replacement can start first, as long as the permit application reaches Prince William County by the end of the next working day. Source.
Prince William Water says the pressure reducing valve is the homeowner’s to install and keep up, that the plumbing code recommends one where pressure runs 80 psi or more, and that pressure rises with the height difference between your house and the water tank serving 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.
When the new piping runs behind a finished ceiling, Prince William County wants a pressure test and its own certified gas piping diagram. Ask whether both are in the number you’re given, or whether they turn up on a second invoice.
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.
James is a wealth of knowledge who provided a competitive estimate to replace our hot water heater. He is professional and courteous. Thank you for a great first call.
Where we work
Next door to Gainesville: Catharpin, Haymarket, Broad Run, Bristow and The Plains.
Questions
If it burns gas, yes, from Prince William County, every time. An electric tank needs none, as long as the new one matches the old in size and goes where it stood. Either way, the price we give you already counts whatever paperwork the job takes.
Almost certainly not, if the house dates from the community’s early years: Heritage Hunt was zoned in 1997, and most tanks are done by 15. Read the date on the label, or the serial number, which most makers code with the year built. A replacement from the late 2000s is due its own replacement now.
Moderately. Prince William Water blends Potomac water with soft Lake Manassas water for this side of the county and rates the result 3.5 to 7.0 grains per gallon, enough to leave sediment in a tank every year. A yearly water heater flush clears it; a tankless wants a descale on a schedule, $300 right now with a whole-home plumbing check, regularly $350.
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 Gainesville 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.