Three floors and one set of pipes
In a three level house with the bedrooms on top, hot water travels farthest to the rooms that use it first thing in the morning. We size for that, and where the wait is long, we talk about a recirculating loop.
Lorton, Virginia
Tankless water heaters in Lorton.
In Lorton, 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 Lorton under Virginia Class A contractor license 2705192276, and SwiftPro is rated 5.0 stars across 1,130 reviews. We cover tankless water heaters in Lorton and Laurel Hill, for the 2000s houses with three floors and the townhomes where an end 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 Lorton.
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 Lorton
Lorton is the newest town on our list, and its tankless jobs are mostly tall houses.
More than four in ten Lorton homes were built in 2000 or later, which is rare for a county where most of the housing is older. Much of it is Laurel Hill, the community that rose after Fairfax County took over the old corrections property in 2002. Those are three level houses and townhomes with a basement, a main floor, an upper floor and a tank somewhere that fills the stairwell with pipe.
A builder’s tank from 2003 is now at the age where a replacement is coming in the next year or two. That makes Laurel Hill the town where the choice is clearest. Some of those houses have a utility room against an outside wall, a tidy place for a tankless unit; some have the heater in an interior closet with no wall to vent through. We find out which kind you have before we price.
Here the gas is a strength. About six in ten owners in the 22079 ZIP heat with gas, and in a house of this age the line often carries more than a tank asks for, because the builder served a furnace, a range and a gas fireplace off the same meter. A small share, about 3 in 100, use propane, mostly out toward Mason Neck. For them a propane tankless is an option, with the tank outside sized into the plan.
Townhomes make up a third of the housing here. An end unit has a side wall; a middle unit has to vent out the front or back, and the homeowners association may want to see it first. In a townhome with a small closet heater, a tankless can mean giving up a little closet wall space for a vent and a condensate line.
Neighborhood by neighborhood
What a tankless install looks like across Lorton.
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 |
|---|---|---|---|---|
| Lorton | 2001 | single-family houses, about 4 in 10 | gas, about 7 in 10 | Replacing the builder tank, and where the vent goes. |
| Newington | 1981 | townhouses, about 6 in 10 | electricity, about 6 in 10 | A short PVC vent out the basement wall. |
| Laurel Hill | 2002 | single-family houses, about 4 in 10 | gas, about 8 in 10 | Replacing the builder tank, and where the vent goes. |
| Mason Neck | 1973 | single-family houses, nearly all | electricity, about 6 in 10 | Whether there’s gas at the house at all. |
By the numbers
Lorton houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Lorton
ZIP 22079 as a whole: every Lorton address. Most of Newington, in the table, has Springfield mail.
- Median home built1997 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 6 in 10 Census
- Rentedabout 2 in 10 Census
- Not every house here has gas, and a whole-house electric tankless needs more amperage than most panels have to spare. Where there’s no gas line, we price a tank instead and say why.
Is it worth it
When going tankless makes sense in Lorton.
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 Lorton?
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Choosing who installs it
How to pick the best tankless installer in Lorton.
Questions to ask anybody who quotes you a tankless, us included.
Do they check where the vent can leave a townhome?
In Lorton’s townhomes the vent route is often the deciding fact. A quote that names the wall it goes through is a quote someone actually looked at.
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 Lorton: Springfield, Fairfax Station, Burke, Annandale and Triangle.
Fairfax County
Arlington County
Loudoun County
Prince William County
Fauquier County
Stafford County
Every town on one page
Questions
Tankless questions from Lorton.
My 2003 Laurel Hill water heater still works. Should I wait?
You can, but a tank that age can leave without warning. Getting a tankless priced now means you pick the day, not the leak. Our water heater estimator takes a few minutes.
Can a Lorton townhouse have a tankless water heater?
Many can, on gas, if there’s a wall to vent through that your association allows. We check that first, and tell you if a tank is the simpler road.
How much is a tankless water heater in Lorton?
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 Lorton 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.