Four people, one morning, one tank
Townhouse or detached, a Centreville house with a 40 or 50 gallon tank runs short when a teenager takes a long shower. A tankless sized to your taps removes that, up to its flow limit.
Centreville, Virginia
Tankless water heaters in Centreville.
In Centreville, 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 Centreville under Virginia Class A contractor license 2705192276, and SwiftPro is rated 5.0 stars across 1,130 reviews. We cover tankless water heaters in Centreville, 20120 and 20121, where townhouses outnumber detached houses and the wall decides the job. 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 Centreville.
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 Centreville
In Centreville, a tankless job usually comes down to the townhouse wall.
Nearly half of Centreville homeowners live in a townhouse, 48 percent against 31 percent in detached houses. That is unusual for Fairfax County, and it shapes the job. A tankless vent has to leave through an outside wall, and what the townhouse allows depends on where it sits in the row.
An end unit has a side wall and often room to vent cleanly. A middle unit has a front and a back, and the vent goes out the back, away from the deck door and the windows, with the condensate line running to a drain. Some middle units work well. Some have a water heater in a closet at the heart of the house, and there the answer can be that a tank is a better fit. We check before we price.
Gas is not the worry here. Seventy-three percent of Centreville homeowners heat with gas, and nearly seven in ten homes went up between 1980 and 1999. The pipe in those houses is better than a 1960s line, but a tankless draws far more than a tank does, so we size the run from the meter against the furnace, range and dryer already on it.
The detached houses are the easy ones. A basement or utility room on an outside wall means a short vent run and little drama. These are mostly 1990 houses with three or four bathrooms, built before big soaking tubs were standard, and many families have added a bathroom or a tub since. Those houses are the ones that most often outgrow a 50 gallon tank.
By the numbers
Centreville houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Centreville
- Median home built1990 Census
- Built before 1980about 1 in 10 Census
- Built since 2000about 2 in 10 Census
- Most homes aretownhouses, about 5 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.
Is it worth it
When going tankless makes sense in Centreville.
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.
You want the floor space back
A tankless unit hangs on a wall about the size of a carry-on bag. Where a 50 or 75 gallon tank took a corner of the utility room, the floor under it is yours again.
Need tankless water heaters in Centreville?
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Choosing who installs it
How to pick the best tankless installer in Centreville.
Questions to ask anybody who quotes you a tankless, us included.
Did they look at which wall the vent exits?
In a Centreville townhouse, the vent location can be the whole job. An installer who prices before looking at the wall, and where it sits in the row, may be pricing a job that cannot be done that way.
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 Centreville: Chantilly, Fairfax, Bristow, Oakton and Gainesville.
Fairfax County
Arlington County
Loudoun County
Prince William County
Fauquier County
Stafford County
Every town on one page
Questions
Tankless questions from Centreville.
Can a middle unit townhouse in Centreville get a tankless?
Sometimes. If the water heater is on a back wall or close to one, the vent can go out the back. If it sits deep in the house, a tank is usually the practical answer. We say which it is at the walkthrough.
Is Centreville’s gas supply big enough for a tankless?
Usually, once the branch line is checked. Most houses here were built in the 80s and 90s with a decent gas pipe, and sometimes the line to the water heater is the only thing that needs upsizing.
How much is a tankless water heater in Centreville?
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 Centreville 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.