The 1990s tank that’s still going
A Leesburg tank from the 1990s that’s still running has beaten the odds. Replacing it by choice, with a gas line check and a vent plan in hand, beats doing it the morning it lets go.
Leesburg, Virginia
Tankless water heaters in Leesburg.
In Leesburg, 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 Leesburg under Virginia Class A contractor license 2705192276, and SwiftPro is rated 5.0 stars across 1,130 reviews. Tankless water heaters in Leesburg and Lansdowne, from 1980s houses inside the bypass to condos where the vent has nowhere obvious to go. 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
Send this and the office calls or texts you back to set a time.
We’ll call or text this number about your request. By sending it you agree to our terms and privacy policy.
Rather talk now? (703) 997-9757
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 Leesburg.
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 Leesburg
In Leesburg, the house decides it: a 1980s basement, a newer townhouse or a Lansdowne condo.
Leesburg has two thirds of its owner homes on gas and about three in ten on electricity, so a tankless is a real option for most houses and not an option at all for the electric ones. About four in ten Leesburg homes went up between 1980 and 1999, in neighborhoods like Exeter and Carrvale. Those are the easiest jobs we see: the water heater is usually in a basement near an outside wall, and the vent run is short.
About a quarter of the town’s homes are older than 1980. In those, the gas line was likely sized for a furnace, a tank and a range, and the water heater may still be on an old chimney. A tankless leaves the chimney behind and vents through the wall in PVC, but the line from the meter has to be checked and sometimes upsized. We look at the whole run before the quote, not only the last few feet. Downtown, any new pipe on the outside of the house is a conversation with the Town. Our water heater page has the rest on tank and tankless options.
Newer neighborhoods like Potomac Station and Edwards Landing have the opposite problem. The house is bigger, the original tank is reaching its years, and the utility room was laid out around a tank, so we check where the vent and the condensate line can go. Many have a soaking tub, and tubs are where a single unit’s flow limit shows up.
Lansdowne is a different job altogether. Close to four in ten homes are in condo buildings, and a condo may not have an outside wall near the heater, or a say over what goes through it. The building’s management and rules come first there, and a gas tankless is sometimes simply not the answer. In that case we say so and price a new tank. A Lansdowne townhouse or single-family home is more straightforward.
Neighborhood by neighborhood
What a tankless install looks like across Leesburg.
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 |
|---|---|---|---|---|
| Leesburg | 1996 | single-family houses, about 4 in 10 | gas, about 7 in 10 | A short PVC vent out the basement wall. |
| Lansdowne | 2005 | condo and apartment buildings, about 4 in 10 | gas, about 8 in 10 | Replacing the builder tank, and where the vent goes. |
By the numbers
Leesburg houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
The Town of Leesburg
Inside the town limits: the Old and Historic District downtown, Exeter and Carrvale inside the bypass, Potomac Station and Edwards Landing outside it.
- Median home built1996 Census
- Built before 1980about 2 in 10 Census
- Built since 2000about 4 in 10 Census
- Most homes aresingle-family houses, about 4 in 10 Census
- Heated withgas, about 7 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 from the 80s and 90s the water heater usually sits in the basement near an outside wall, which keeps the PVC vent run short.
The Loudoun County side
Lansdowne only. It’s the one Census place outside the town limits, so the farms and lots beyond it aren’t in these figures.
- Median home built2005 Census
- Built before 1980hardly any Census
- Built since 2000about 9 in 10 Census
- Most homes arecondo and apartment buildings, about 4 in 10 Census
- Heated withgas, about 8 in 10 Census
- Rentedabout 3 in 10 Census
- 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 Leesburg.
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 Leesburg?
A person answers day and night. See this month’s deals before you call.
Choosing who installs it
How to pick the best tankless installer in Leesburg.
Questions to ask anybody who quotes you a tankless, us included.
Did they tell you where the vent will come out?
In a condo or a downtown house, the answer might not be allowed. An installer who raises this before the price is one who has done it here.
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
Questions
Tankless questions from Leesburg.
Does Leesburg’s water matter for a tankless?
A little. The Town’s own water runs moderately hard, 5.8 to 8.8 grains per gallon, which builds scale on a heat exchanger over time. A yearly descale handles it, and we leave the service valves where we can reach them.
How much is a tankless water heater in Leesburg?
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 Leesburg 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.