Open 24/7 for emergencies
A new boiler runs $9,900 to $16,500 installed, a tune-up is $99 a system, and a repair gets a written price after the $99 diagnostic.
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
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Boiler repair and replacement in Vienna, from the Town’s older basements to Wolf Trap’s newer builds.
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
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 Vienna
Inside the Town of Vienna, the typical owner home went up in 1972, and about two in three of them were built before 1980. That is where the boilers are. In those houses the boiler usually stands in the basement next to the gas water heater, both venting up one masonry chimney. The newer quarter of the town’s homes, built since 2000, mostly heat with forced air, so a boiler there is the exception, often a Navien combi in a utility room.
Gas heats about eight in ten owner homes in the Town, and the boilers we service follow that pattern. In these 1972-era houses, the boiler is often the original unit. When it acts up, it’s usually the circulator pump, a zone valve, or the expansion tank. A dripping relief valve points to pressure near 30 psi, while cold radiators at the top suggest air in the loop. We run the $99 diagnostic to pinpoint the part, then give you a written price before we touch the system.
Replacing a boiler in these older basements hinges on the chimney. A cast iron unit can often use the existing flue, placing the cost at the lower end of $9,900 to $16,500. A condensing boiler vents through the wall in white plastic pipe, costing $12,782 to $16,500. In Windover Heights, a new vent pipe on a street-facing wall is an exterior change. The Board of Review must approve it before installation, so check that requirement before you pick a model.
In Wolf Trap, the housing is newer, with a median build year of 1980. Most homes are detached and heat with gas. Boilers are less common here than in the Town, but when they exist, they are often heat-only units paired with a separate water heater. The $99 tune-up checks the burner, the flame and the pressure before the cold months, with the water heater beside it checked in the same visit.
Neighborhood by neighborhood
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 |
|---|---|---|---|---|
| Wolf Trap | 1980 | single-family houses, nearly all | gas, about 7 in 10 | 1980s and 90s houses, mostly forced air; boilers in the older ones. |
| Vienna | 1972 | single-family houses, about 8 in 10 | gas, about 8 in 10 | Older houses, where cast iron boilers and radiators still turn up. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
Nearly the whole town sits in 22180, which it shares with county streets toward Dunn Loring and Merrifield.
Vienna mail outside the town line: Wolf Trap and the Tysons edge in 22182, the Oakton side of 22181, Dunn Loring. The figures are Wolf Trap’s, the biggest piece.
What it’s telling you
Inside the Town, the boiler and water heater often share one masonry flue. A condensing unit vents out the wall, leaving the water heater on that flue by itself. Fairfax County is the building official here, so the swap needs a county permit and a chimney vent certification. We check the flue condition and price any liner work in the written quote before we start.
An aging Peerless cast iron boiler in a Northern Virginia basement, chimney vented, on a SwiftPro service call.
Safety and paperwork
Inside the Town of Vienna, Fairfax County is the building official, so a gas water heater or furnace swap in town takes a Fairfax County permit, even like for like, and the county page adds that work in the town can need the Town’s own sign-off too. Source.
Fire and rescue inside the town is Fairfax County’s, from Station 2 on Center Street, so the county’s heating advice is the town’s: a professional cleaning and check of the heating system every year. 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.
Our Virginia Class A contractor license, 2705192276, is on the side of the van.
Choosing who works on it
Questions to ask anybody who quotes you, us included.
A Vienna mailing address doesn’t settle it. Inside the Town, Fairfax County is the building official, so a gas boiler swap takes a county permit, and the county notes that work in the town can need the Town’s own sign-off too. In Windover Heights, a change the street can see adds the Board of Review. Ask before the install date is set.
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.
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
5.0 stars across 1,132 reviews. Read them on our reviews page.
…I had the pleasure of working with Efrain and Alex last year on a Boiler heater. The quality of work and total professionalism contributed 100% to my decision…
Where we work
Next door to Vienna: Dunn Loring, Oakton, McLean, Fairfax and Reston.
Questions
Yes, but the vent pipe on the wall is an exterior change. The Windover Heights Board of Review needs to approve it before the install. The boiler itself is fine; it is the pipe that triggers the review. The permit is still Fairfax County’s, and the Town’s sign-off goes with it.
Age alone doesn’t decide it. If the heat exchanger is cracked, that’s a replacement. If the circulator pump or the expansion tank is the issue, that’s a repair. The $99 diagnostic identifies the fault, and you get a written price before the system is drained. A 1970s boiler can keep running for years with the right parts.
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
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 Vienna 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.