The builder tank at year fifteen
A large share of Ashburn went up after 2000, so the first tanks are reaching the age when they fail. Pricing a tankless while the old tank still works gives you time to pick the wall and the vent.
Ashburn, Virginia
Tankless water heaters in Ashburn.
In Ashburn, a tankless water heater installed is $8,886 to $10,486. That’s after $500 off any size, the best water heater deal we have. Call SwiftPro, rated 5.0 stars across 1,130 reviews, at (703) 997-9757, 24 hours a day, 7 days a week.
$148/mo60mo @ 0% APR
Price range
$8,886-$10,486
8yrs @ 7.99%
$126/mo
15yrs @ 9.99%
$95/mo
Monthly figures on the starting price, the whole price financed, on approved credit. The lender sets the final terms. How financing works
We install in Ashburn under Virginia Class A contractor license 2705192276, and SwiftPro is rated 5.0 stars across 1,130 reviews. We cover tankless water heaters in Ashburn, from townhouse closets in Moorefield to the bigger detached houses in Broadlands and Belmont. Staying with a gas tank on the flue you have is $3,238 to $5,485. Once a year a tankless wants a descale, $300 right now, regularly $350.
- Gas line sized before the quote
- Our own licensed plumbers
- Descaled on a schedule
5.0 stars across 1,130 reviews
One of our plumbers at a wall-hung tankless unit, the condensate line and the PVC vent in view.
Get your price in writing
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Licensed and insuredVirginia Class A contractor #2705192276
24/7 emergency serviceWe answer day or night, 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
What a tankless water heater costs in Ashburn.
Installed, from the same price book as our water heater estimator: the unit, the gas line work it needs, the new venting, the condensate drain, the permit and hauling the old tank away.
Tankless water heater, installed
$8,886 to $10,486
or $148/mo at 0% APR for 60 months
Gas or propane tank on the flue you have, installed
$3,238 to $5,485
or $54/mo at 0% APR for 60 months
Tankless descale, with the plumbing check
$300, regularly $350
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
Prices checked .
Where you land in the range is mostly the gas line. A tankless burner fires far harder than a tank’s, so an older line sized for a tank often has to be upsized from the meter. We look before we quote, so that’s in the number, not a surprise.
A tankless unit’s heat exchanger scales up in hard water, so it wants a descale every year: $300 right now, regularly $350. We’ll show you the inlet screen and what came off it.
What’s different in Ashburn
Ashburn tankless jobs split by house type: an end townhouse, a middle one, or a big detached house.
Gas is already there for more than eight in ten Ashburn owner homes, so the question is rarely whether. It’s the wall. Nearly four in ten Ashburn homes are townhouses, and a tankless vents in PVC straight out an exterior wall. An end unit has a side wall to use. A middle unit has only the front and the back, so we look at where the heater sits and whether a short run to the rear wall is possible before we say yes.
Where the heater lives matters as much as the unit. In many townhouses the tank stands in a closet upstairs or off the garage, with no basement under it. A tankless hangs on the wall, which suits a closet, but the vent, the intake and the condensate line each need a path. Condensate is what people forget: it runs to a drain or a small pump, and an upstairs closet doesn’t always have a drain close.
The detached houses in Broadlands and Belmont, where gas heats about nine owner homes in ten, are a different job. Many have four bathrooms and a soaking tub, and the line to a house that size often carries more than a tank needs, so the work can be little more than the unit, the vent and the drain. We still count taps with you. Two showers, a filling tub and a dishwasher together can be more than one unit supplies.
About one owner in ten in Goose Creek Village heats with propane, so a propane tankless is an option there. In a neighborhood with design rules, a new vent through a wall is an exterior change; the Brambleton guidelines say one generally won’t be approved where it shows, so we pick the wall with that in mind. Loudoun County’s permit comes with a gas job, and we pull it.
Neighborhood by neighborhood
What a tankless install looks like across Ashburn.
Census figures for the owner-occupied homes in each place, and what usually decides a tankless job in houses like them.
| Place | Median home built | Most homes are | Heated with | What usually decides the job |
|---|---|---|---|---|
| Ashburn | 1998 | single-family houses, about 4 in 10 | gas, about 8 in 10 | A short PVC vent out the basement wall. |
| Brambleton | 2011 | townhouses, about 5 in 10 | gas, about 8 in 10 | Replacing the builder tank, and where the vent goes. |
| Broadlands | 2004 | single-family houses, about 6 in 10 | gas, about 9 in 10 | Replacing the builder tank, and where the vent goes. |
| Loudoun Valley Estates | 2013 | townhouses, about 6 in 10 | gas, about 8 in 10 | Replacing the builder tank, and where the vent goes. |
| Belmont | 2005 | single-family houses, about 6 in 10 | gas, about 9 in 10 | Replacing the builder tank, and where the vent goes. |
| Moorefield | 2015 | townhouses, about 6 in 10 | gas, about 7 in 10 | Replacing the builder tank, and where the vent goes. |
| One Loudoun | 2015 | townhouses, about 4 in 10 | gas, about 7 in 10 | Replacing the builder tank, and where the vent goes. |
| University Center | 1996 | condo and apartment buildings, about 4 in 10 | gas, about 8 in 10 | A short PVC vent out the basement wall. |
By the numbers
Ashburn houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Ashburn
- Built before 1980hardly any Census
- Built since 2000about 7 in 10 Census
- Most homes aresingle-family houses, about 4 in 10 Census
- Heated withgas, about 8 in 10 Census
- Rentedabout 3 in 10 Census
- Most homes here heat with gas, so the meter and the main line are already there. The question is whether the branch to the water heater is big enough.
- In houses built since 2000 the original tank is reaching its years, and the utility room was laid out around it, so we check where the vent and the condensate line can go.
Is it worth it
When going tankless makes sense in Ashburn.
The builder tank is near the end
If the original tank is past ten years, the choice is coming either way. Pricing tankless now, while you still have hot water, beats deciding the morning it leaks.
The hot water runs out every morning
When two showers and the dishwasher empty the tank before everyone’s done, a tankless heats as you use it. It won’t run dry, but it has a flow limit, so it’s sized to how many taps run at once.
Need tankless water heaters in Ashburn?
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Choosing who installs it
How to pick the best tankless installer in Ashburn.
Questions to ask anybody who quotes you a tankless, us included.
Did they look at the wall the vent goes through, not just the heater?
In a middle townhouse that wall can decide whether tankless works at all. Ask where the vent and intake will come out before you sign.
Did they look at the gas line before the price?
A tankless burner can draw several times what a tank does. A quote written without checking the line from the meter is a quote that grows on install day.
Do they size it to your flow, not the house’s square feet?
What matters is how many showers and faucets run at the same time, and how cold the water comes in during winter. Ask what flow rate they sized it for and why.
Two of our crew going over a work order before the day's calls.
From our Google reviews
What our customers say.
5.0 stars across 1,130 reviews. Read them on our reviews page.
This Company installed a tankless water system!!! They were great!!! Very Professional & Efficient & they Cleaned up & took out the old water tank! I would highly recommend them!!
- 5.0stars across 1,130 reviewsHow we count them
- ABBB Accredited, A ratingCheck it on bbb.org
- 2026Voted a Nextdoor Neighborhood Faves winner two years running: 2026 in 30 Northern Virginia neighborhoods, 2025 in Emerald Chase (Herndon) and Hunters Run (Chantilly)See it on Nextdoor
- #1BusinessRate Best of 2026: the top-ranked heating contractor in Fairfax, VirginiaSee our BusinessRate score
- Class AVirginia contractor, license #2705192276Look it up with DPOR
Where we work
Tankless water heaters in every Northern Virginia town we serve
Next door to Ashburn: Leesburg, Aldie, Chantilly, Great Falls and Haymarket.
Fairfax County
Arlington County
Loudoun County
Prince William County
Fauquier County
Stafford County
Every town on one page
Questions
Tankless questions from Ashburn.
Can a middle townhouse in Ashburn take a tankless?
Sometimes. It depends on whether the heater sits close enough to an outside wall for a short vent run. We check first, and if it can’t work we say so and price a new tank.
Does a tankless need a power outlet?
Yes, a small one for the fan and controls. A closet or garage wall usually has one nearby, and we check before the quote so it isn’t a surprise.
How much is a tankless water heater in Ashburn?
Installed, $8,886 to $10,486, with the gas line work, the venting, the condensate drain and the permit in that number. A gas tank on the flue you have is $3,238 to $5,485, so the gap is what you pay for the floor space and the hot water that keeps up.
Will a tankless keep up with my whole house?
It never empties, because there’s no tank to empty. It does have a limit on how much hot water it makes per minute, and in January, when the water comes in cold, that limit drops. Sized to the number of showers you run at once, a family doesn’t notice.
Ready when you are
Find out if your house is a fit.
Call, or send the form at the top. We look at the gas line, the wall it would vent through and how much hot water you run at once, and you get the price in writing before anything comes out.
SwiftPro Heating, Cooling & Plumbing
4230 Lafayette Center Dr N, Chantilly, VA 20151
44679 Endicott Dr, Suite 211, Ashburn, VA 20147
SwiftPro Plumber & Water Heaters
4200 Lafayette Center Dr, Suite N, Chantilly, VA 20151
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 Ashburn and the rest of Northern Virginia. Virginia contractor license #2705192276. 5.0 stars across 1,130 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.