Boiler repair and replacement in Chantilly.
Boiler repair and replacement in Chantilly covers 20151 and 20152.
A new boiler runs $9,900 to $16,500 installed, a tune-up is $69 a system, regularly $99, 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
The county line changes the permit rules you need to follow.
Book your boiler visit
- Hot water boilers, gas and propane
- Navien, Weil-McLain and Force
- Heating and plumbing teams
Boilers are rare in Chantilly, but when one fails, the county line changes the rules.
We don’t see boilers in Chantilly as often as in neighboring towns. Water heaters come up more frequently in our local work. In 20151, the median home was built in 1987, and about six in ten are single-family. Most of those homes use gas furnaces or heat pumps. If you have a hot water boiler heating radiators or baseboard, it is likely in one of the older homes or a specific layout that favored hydronic heat. The service is the same, but the context is different here than in most of Northern Virginia. We treat these jobs with the same care, even though they are a smaller share of our local calls.
The county line matters for permits. In 20152, South Riding is in Loudoun County. This difference affects how we schedule the work and what paperwork is ready before the tech arrives. We handle the applications so you don’t have to guess which office to call.
If your boiler is gas or propane and heats radiators or baseboard, we can repair it, tune it up, or replace it. A tune-up in Chantilly costs $69 a system, regularly $99. A repair begins with a $99 diagnostic. If you are considering a switch from an oil-fired system, which is rare here, or moving to a heat pump, that is a different project we can price. If your system is a hot water boiler on gas or propane, we are the right fit. We will walk you through the options and the costs before any work begins.
In 20152, Loudoun Water points to Fairfax Water’s data for hardness figures. A tune-up includes checking the heat exchanger and the burner for signs of scale or soot. If you have a CO alarm on every floor, as Fairfax County Fire and Rescue recommends, you are ahead of the curve. If a boiler quits in winter, Virginia law allows emergency replacement to start first, with the permit application filed by the next working day. We can get that process moving quickly.
Where the boilers are across Chantilly.
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 |
|---|---|---|---|---|
| South Riding | 2006 | single-family houses, about 5 in 10 | gas, about 8 in 10 | Built since 2000, almost all forced air. |
| Chantilly | 1987 | single-family houses, about 6 in 10 | gas, about 5 in 10 | 1980s and 90s houses, mostly forced air; boilers in the older ones. |
Chantilly houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
20151, the Fairfax County side
- Median home built1987 Census
- Built before 1980about 2 in 10 Census
- Built since 2000about 2 in 10 Census
- Most homes aresingle-family houses, about 6 in 10 Census
- Heated withgas, about 5 in 10 Census
- Rentedabout 2 in 10 Census
- Most houses built here since about 1980 heat with forced air, so a boiler on these streets is usually in one of the older houses or a custom home.
20152, the South Riding side
- Median home built2006 Census
- Built before 1980hardly any Census
- Built since 2000about 8 in 10 Census
- Most homes aresingle-family houses, about 5 in 10 Census
- Heated withgas, about 8 in 10 Census
- Rentedabout 2 in 10 Census
- Houses built here since 2000 almost all heat with forced air, so a boiler is the exception. When we find one, it gets the same tune-up and the same written price.
- Most homes here heat with gas, so a boiler tune-up here starts with the gas pressure and the flame.
What boiler repair and replacement cost in Chantilly.
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 $69 a system, regularly $99.
- High-efficiency condensing boiler or combi boiler, installed$12,782 to $16,50060mo @ 0% $213/mo
- Cast iron boiler on the chimney, replaced like for like, installed$9,900 to $13,69060mo @ 0% $165/mo
- Boiler tune-up, one system$69, regularly $99
- Boiler repair diagnostic visit$99
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.
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
What your boiler is telling you in Chantilly.
The boiler is in a house that mostly has a furnace
In Chantilly, most homes use gas furnaces or heat pumps. A boiler is less common, so the parts and labor may not be as readily available locally. We stock common parts for gas and propane boilers, but for specialized hydronic components, we may need to order. This can affect timing.
What the county says about boilers in Chantilly.
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.
Loudoun County
Loudoun County requires a permit to swap a gas water heater or furnace. Since October 2025, a replacement that keeps the same BTUs in the same spot needs no plans. Source.
In its fall clock-change reminder, Loudoun County’s fire and rescue system tells residents to check their carbon monoxide alarms, and recommends one outside each sleeping area and on each level of the home, tested monthly. Source.
How to pick who works on your boiler in Chantilly.
Questions to ask anybody who quotes you, us included.
Do they know the difference between Fairfax and Loudoun permit rules?
In Chantilly, the county line splits the town. Fairfax County requires a permit and chimney certification for gas boiler replacements. Loudoun County has a no-plans rule for like-for-like swaps since October 2025. A tech who doesn’t know this will waste time on the wrong paperwork. Ask which office your address files with, so the right permit is filed the first time.
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.
What our customers say.
Arrived within an hour on a Sunday morning and provided great service.
Called SwiftPro around 5 am and their electronic system scheduled an appointment for us same day.
Replacement for my broken gas water boiler was professionally done and in a timely manner. The technicians knew exactly what they were doing.
5.0 stars across 1,131 reviews. Read them on our reviews page.
Boiler questions from Chantilly.
Do you service boilers in both 20151 and 20152?
Yes, we work on gas and propane hot water boilers in both 20151 and 20152. The mechanical work is identical, but the paperwork differs. Fairfax County requires a permit and chimney vent certification for gas appliance swaps. Loudoun County has specific rules for like-for-like replacements. We file the correct application for your side of the county line so you don’t have to navigate two different offices.
Is it worth fixing an old boiler in Chantilly?
If it is a small part, like a circulator or a valve, yes. If the heat exchanger is cracked or the boiler is over twenty years old, replacement is usually better. In 20151, the median home is from 1987, so some boilers are nearing the end of their life. In 20152, homes are newer, so boilers there are less likely to be original. We will give you a written price after the $99 diagnostic so you can decide with both options in front of you.
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.
Boiler service in the towns next door.
- Boiler repair and replacement in Centreville
- Boiler repair and replacement in Catharpin
- Boiler repair and replacement in Herndon
- Boiler repair and replacement in Aldie
- Boiler repair and replacement in Oakton
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Get the boiler looked at before the cold week.
Call any time: we run 24/7 emergency service. Or book online and pick a window. A tune-up is $69, a repair starts with the $99 diagnostic, and a new boiler gets a written price before any work.
SwiftPro Heating, Cooling & Plumbing is a licensed, BBB Accredited (A rating), independently owned heating, cooling and plumbing company in Chantilly, serving Chantilly and the rest of Northern Virginia. Virginia contractor license #2705192276. 5.0 stars across 1,131 reviews on Google, Angi, Yelp, the BBB and Facebook. SwiftPro maintains a dedicated HVAC team and a dedicated plumbing team.
SwiftPro Heating, Cooling & Plumbing, 4230 Lafayette Center Dr, Suite N, Chantilly, VA 20151, (703) 997-9757. Book online, read our reviews, or see every town we serve.