Boiler repair and replacement in Great Falls.
Great Falls boiler service covers gas and propane units in these large detached homes.
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
Book your boiler visit
- Hot water boilers, gas and propane
- Navien, Weil-McLain and Force
- Heating and plumbing teams
Great Falls boilers: mostly gas or propane, in big detached homes.
About 46 in 100 owner homes here heat with natural gas, and another eight in 100 use propane from a tank in the yard. That propane share is far higher than the county average. Most of the houses in Great Falls are detached, with a median build year of 1986. A boiler in this town is often in one of the larger homes, where space allows for a floor-standing unit. We do not work on oil boilers. If you are switching from oil to a gas, propane, or heat pump system, that is a project we can price.
County tax records show two-thirds of homes here have a daylight basement. That ground-level access makes servicing a boiler much easier than reaching an attic unit. When swapping a cast iron boiler for a condensing model, the venting changes completely. The old metal flue in the chimney is replaced by white plastic piping that exits through the exterior wall. In a daylight basement, that pipe often goes straight out the same wall that opens to the yard, keeping the setup simple and code-compliant.
Fairfax County requires a permit to replace any gas appliance, even like for like. Replacing a fuel-burning appliance also needs a chimney vent certification. If your boiler is on propane, the same permit rules apply. The county’s fire department advises having gas appliances inspected every fall and keeping a CO alarm on every floor. A boiler that is leaking or struggling to maintain pressure is a safety issue, not just a comfort one. The $99 diagnostic identifies the specific failure before you decide on repair or replacement.
Many Great Falls homes are large, with a median of 3,700 square feet above ground. That size often means the heating system is split, with a boiler for the lower floors and a separate system for the upper levels. If one floor is cold while the other is warm, check the thermostats first. A boiler that is working but not reaching the upper radiators may have air in the lines or a failing circulator pump. Both are repairs, not replacements, and the $69 tune-up in the fall can catch them before winter makes them urgent.
Great Falls houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
Great Falls
- Median home built1986 Census
- Built before 1980about 4 in 10 Census
- Built since 2000about 2 in 10 Census
- Most homes aresingle-family houses, nearly all Census
- Heated withgas, about 5 in 10 Census
- Rentedhardly any Census
- A few homes here still heat with oil. We don’t work on oil boilers; a switch to a heat pump or a gas or propane boiler is ours to price.
- Some homes here run on propane, and a propane boiler gets the same tune-up, checked against propane’s gas pressure.
What boiler repair and replacement cost in Great Falls.
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 Great Falls.
One floor is cold and the other is fine
With split heating, one unit quitting leaves the rest of the house warm. If the cold floor’s boiler is past fifteen years, let the $99 diagnostic price the repair. If it is the pump or the expansion tank, it is a fix.
What the county says about boilers in Great Falls.
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.
How to pick who works on your boiler in Great Falls.
Questions to ask anybody who quotes you, us included.
Do they check the venting before pricing a new boiler?
Yes. In Great Falls, where two-thirds of homes have a daylight basement, the vent path often goes straight out the yard-facing wall. We check that route, including the chimney if you are keeping a cast iron unit, before pricing. The venting method changes the work, so we inspect it end to end first.
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.
…excellent service when my boiler needed to be replaced during the polar vortex. Alex Hittle came quickly, … and replaced my boiler quickly. Alex even managed to change their schedule, with the kind permission of their other customer so that I could have heat again in the freezing weather.
4.95 stars across 1,131 reviews. Read them on our reviews page.
Boiler questions from Great Falls.
Can a Great Falls house on propane get a new boiler?
Yes. A propane boiler uses the same components as a natural gas one, but the burner and gas valve are set for propane pressure. Your propane supplier keeps the tank and the line to the house. Propane boilers are priced on the same range as gas, with the venting named in the written quote.
Is my Great Falls boiler too old to repair?
Age alone does not decide it. If the heat exchanger is leaking, the unit is done. If the issue is the circulator pump, the pressure relief valve, or the expansion tank, those are parts we can swap. The $99 diagnostic visit identifies the specific failure so you know exactly what you are looking at before any work begins.
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 Reston
- Boiler repair and replacement in Herndon
- Boiler repair and replacement in Sterling
- Boiler repair and replacement in Vienna
- Boiler repair and replacement in McLean
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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 Great Falls and the rest of Northern Virginia. Virginia contractor license #2705192276. 4.95 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.