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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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Water heater repair and replacement in Philomont, in a ZIP area where propane and electricity heat most owner homes. 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 Philomont
Philomont’s own ZIP, 20131, is post office boxes only, so the Census figures here describe ZIP 20132, the Purcellville area around it. There, about 42 percent of owner homes heat with propane and about 42 percent with electricity; natural gas and oil each heat about 6 percent. The heater in a house often runs on the same fuel as the furnace. A propane tank has a flue and a gas valve, an electric one has neither, and $3,379 to $5,485 covers a gas or propane tank where $2,757 to $5,493 covers an electric one. The median owner home dates to 2000, so the tank in it now is likely a second or third.
Groundwater matters in western Loudoun. A county brochure says about a quarter of Loudoun residents depend on it, mostly in the western and northern parts, and most of them on a private well on their own lot. With a well, a pump and pressure tank feed your heater, and how much grit comes along varies from well to well. A test tells you. If Loudoun Water serves your address, its 2025 report prints no hardness figure and points customers to Fairfax Water’s Corbalis data.
Cold works a tank hard here too. The Purcellville weather station, 6.2 miles north-northeast, averages a January low of 24.5F and counts 114.7 days a year at or below 32F. Philomont logged a wind chill of -9F on December 24, 2022, and the coldest nights of the January 2026 arctic outbreak fell under Extreme Cold Warnings. A tank near the end of its life tends to show it in weeks like those.
Paperwork is lighter than people expect. Loudoun County issues the gas water heater permit, and since October 2025 it skips plan review for a swap that keeps the old BTUs in the old spot. On a gas or propane swap we pull that permit, and its cost sits inside the installed price.
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Philomont’s own ZIP, 20131, is post office boxes only, so the Census Bureau maps no area for it. These are ZIP 20132 as a whole, the Purcellville ZIP area Philomont sits in, the Town of Purcellville included.
What you’d notice
On a well, the grit that settles in a tank varies from well to well, and a test tells you. Enough of it can pile over an electric tank’s lower element or smother a propane burner’s flame, and the hot water runs short. We look at that first in a tank that is in its second or third round in a house from around 2000.
An electric tank has two elements. When one fails the water still warms, just never all the way; it’s a common, fixable part.
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
Loudoun County requires a permit to swap a gas water heater or furnace. Since October 2025, a replacement that keeps the same BTUs in the same spot needs no plans. 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 Loudoun County by the end of the next working day. Source.
Loudoun Water’s rules put the pressure regulator entirely on the customer. 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 well with a pressure tank and a Loudoun Water line are different jobs, so the plumber should ask which you have before choosing a heater. Ask too whether the quote names the permit for a gas or propane unit, and what happens to the old tank.
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.
I had a really pleasant personal experience with Swiftpro when my water heater went out. The pricing was very reasonable compared to the many other HVAC companies I sought quotes from. I highly recommend them
Where we work
Next door to Philomont: Middleburg, Round Hill, Bluemont, Purcellville and Hamilton.
Questions
Yes. Virginia’s building code lets the work begin first, so long as your permit application reaches Loudoun County by the end of the following working day. The gas swap permit is already in our number: $3,379 to $5,485 installed for a gas or propane tank, $2,757 to $5,493 for an electric one.
Your own supplier’s. Loudoun Water prints none, so its customers go by the Corbalis data it points to. A private well comes without a utility report, and a test tells you. Once you have it, the yearly flush is how sediment leaves a tank.
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 Philomont 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.