The utility closet is crowded
In a Lorton townhouse a boiler and a water heater can share one small closet. When the boiler goes, a combi that makes the hot water too can take the water heater’s space back.
Lorton, Virginia
Boiler repair and replacement in Lorton.
Lorton boilers are mostly gas-fired and few, with a $99 tune-up and new ones at $9,900 to $16,500 installed.
$165/mo60mo @ 0% APR
Price range
$9,900-$16,500
8yrs @ 7.99%
$140/mo
15yrs @ 9.99%
$106/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
Send this and the office calls or texts you back to set a time.
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Rather talk now? (703) 997-9757
- Hot water boilers, gas and propane
- Navien, Weil-McLain and Force
- Heating and plumbing teams
5.0 stars across 1,132 reviews
Two of our heating technicians in a Northern Virginia basement. The same team tunes up, repairs and replaces boilers.
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 HVAC installersA dedicated heating and cooling team, separate from our plumbers
Price in writing firstYou see every option priced before anything is ordered
What it costs
What boiler repair and replacement cost in Lorton.
A new boiler runs $9,900 to $16,500 installed, the range of our own boiler replacements; a condensing or combi boiler lands at $12,782 to $16,500. A tune-up is $99 a system.
High-efficiency condensing boiler or combi boiler, installed
$12,782 to $16,500
or $213/mo at 0% APR for 60 months
Cast iron boiler on the chimney, replaced like for like, installed
$9,900 to $13,690
or $165/mo at 0% APR for 60 months
Boiler tune-up, one system
$99
Boiler repair diagnostic visit
$99
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
A repair starts with the $99 diagnostic. If the fix is a circulator pump, a valve or an expansion tank, you get that price in writing before we start, and you decide.
Want a closer number before anyone comes out? The boiler estimator asks a few questions about yours and shows the range for that job.
What’s different in Lorton
Lorton’s houses are mostly from the 1980s on, so a boiler here usually sits in the older sixth.
ZIP 22079 holds 8,814 owner homes; about four in ten went up between 1980 and 1999 and another four in ten since 2000, the typical one in 1997. Those houses were built around ducts and blowers, so a hot water boiler in Lorton usually sits in the roughly one in six owner homes older than 1980. Fewer than one in twenty owner homes is older than 1960.
Lorton is a gas town, six in ten owner homes, and its boilers follow suit. About a third of the homes are townhouses and about one in six are condos, and in those the boiler often shares a utility closet with the water heater, where a wall-hung combi can clear the whole floor.
About one in four Lorton homes is rented, which usually puts the boiler on the owner’s to-do list rather than the tenant’s. Condos are about one in six owner homes, and in those buildings the boiler in the basement typically belongs to the association, so the documents come before the booking.
Detached houses are a bit over four in ten owner homes, and that’s where most of Lorton’s older boilers are, in basement corners with room to work. Replacing one on the County side means a Fairfax County permit even like for like, and keeping a cast iron boiler on the chimney versus going condensing through the wall is the main fork in the written price. A boiler kept on the chimney also keeps any water heater sharing that flue in the conversation, since the written price has to say how the water heater vents afterward.
Neighborhood by neighborhood
Where the boilers are across Lorton.
Census figures for the owner-occupied homes in each place, and what a boiler call there usually meets.
| Place | Median home built | Most homes are | Heated with | What a boiler call usually meets |
|---|---|---|---|---|
| Lorton | 2001 | single-family houses, about 4 in 10 | gas, about 7 in 10 | Built since 2000, almost all forced air. |
| Newington | 1981 | townhouses, about 6 in 10 | electricity, about 6 in 10 | Mostly heat pumps; a boiler is the exception. |
| Laurel Hill | 2002 | single-family houses, about 4 in 10 | gas, about 8 in 10 | Built since 2000, almost all forced air. |
| Mason Neck | 1973 | single-family houses, nearly all | electricity, about 6 in 10 | Mostly heat pumps; a boiler is the exception. |
By the numbers
Lorton houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
Lorton
ZIP 22079 as a whole: every Lorton address. Most of Newington, in the table, has Springfield mail.
What it’s telling you
What your boiler is telling you in Lorton.
Close view of a SwiftPro boiler installation in Northern Virginia showing the expansion tank, automatic air vent, fill valve and the vent connector into the chimney.
Safety and paperwork
What the county says about boilers in Lorton.
Fairfax County
Fairfax County requires a permit to replace any gas appliance, even like for like: a gas water heater, furnace or boiler. Replacing a fuel-burning appliance also needs a chimney vent certification. Source.
Fairfax County lists replacing a heating or cooling system as mechanical permit work. Source.
Fairfax County Fire and Rescue names a faulty gas furnace or water heater as a carbon monoxide source, says to have gas appliances inspected every fall, and to put a CO alarm on every floor. Source.
Fairfax County Fire and Rescue says to have the heating system cleaned and checked by a professional every year, and to keep anything that burns at least three feet from the furnace and the water heater. Source.
Our Virginia Class A contractor license, 2705192276, is on the side of the van.
Choosing who works on it
How to pick who works on your boiler in Lorton.
Questions to ask anybody who quotes you, us included.
Will they measure the closet before quoting a combi?
A wall-hung combi needs clearances and a wall for its vent. Ask the installer to measure before the quote, not on install day.
Can they handle both halves of it?
A hot water boiler is half heating system (the burner, gas valve, flue and controls) and half plumbing (the water loop, circulator pumps, expansion tank, relief valve and zone valves). We hold a Virginia Class A license and run separate heating and plumbing teams, so each half gets a tech who does that trade every day.
Does the quote say how it vents?
A new boiler can stay on the chimney or vent out the wall in plastic pipe. A good quote says which, and whether the chimney needs a liner, because that’s where two quotes for the same boiler usually split.
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 1,132 reviews. Read them on our reviews page.
…did a great job recommending a new system for a Condo that did not previously have one at all (Old Boiler System). The installation went great.
Where we work
Boiler repair and replacement in every Northern Virginia town we serve
Next door to Lorton: Fort Belvoir, Springfield, Woodbridge, Fairfax Station and Burke.
Fairfax County
Arlington County
Loudoun County
Prince William County
Fauquier County
Stafford County
Questions
Boiler questions from Lorton.
Is a combi boiler a good fit for a Lorton townhouse?
Often, because it hangs on the wall and replaces both the boiler and the water heater. It runs $12,782 to $16,500 installed, and the vent goes out through an outside wall.
Is a Lorton boiler from before 1980 worth repairing?
If the heat exchanger is sound, usually: pumps, valves and expansion tanks are repairs, and on a boiler that old a new circulator can buy years. The $99 diagnostic tells you which kind of job you have.
Do you work on steam or oil boilers?
No. We work on hot water boilers, the kind that heat radiators or baseboard, on natural gas or propane. If yours is steam or burns oil, we’ll tell you on the phone, and a switch to a heat pump or a gas or propane boiler is ours to price.
Ready when you are
Get the boiler looked at before the cold week.
Call any time: we run 24/7 emergency service. Or send the form at the top. A tune-up is $99, a repair starts with the $99 diagnostic, and a new boiler gets a written price before any work.
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 Lorton 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.