Boiler repair and replacement in Catharpin.
A boiler tune-up in Catharpin is $69 a system, and a new propane or gas boiler runs $9,900 to $16,500 installed.
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
Catharpin is propane and electric country, so its boilers usually burn propane.
Only about one in fourteen owner homes in ZIP 20143 heats with natural gas. Just under half use electricity and about a third burn propane, so a hot water boiler out here is a minority system, and when there is one it usually runs on propane from a tank beside the house.
About one in twelve owner homes still heats with oil, and the switch that replaces it, a propane boiler or a heat pump, is something we price. The 334 owner homes are detached houses, a mix of old and new: about four in ten since 2000, one in five from before 1960. Radiators and baseboard belong mostly to the older ones.
Catharpin sits low near Little Bull Run, which crossed its record flood stage overnight in December 2023 and closed Pageland Lane and Artemus Road. A boiler in a basement or crawlspace that has taken on water can have a rusted burner or damaged controls, so tell us if yours ever sat in water; the $99 diagnostic checks for it before anyone talks about a new one.
Swapping a propane boiler here takes a Prince William County permit, even when the new one goes in the old one’s place. The heating season is long: the Dulles station counts more than a hundred nights a year at or below freezing, the 2016 blizzard dropped up to 30.0 inches near Bull Run, and the late January 2026 Arctic outbreak pushed wind chills to 10 below zero. A boiler that coasted through a mild October runs flat out in a stretch like that, and that’s when a weak circulator or a waterlogged expansion tank gives up. In June 2020, winds estimated near 69 mph blew down numerous large trees near Sudley Springs and Catharpin, and a boiler without power can’t run its circulator.
What boiler repair and replacement cost in Catharpin.
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 Catharpin.
The basement has flooded before
Water that reached the boiler can rust the burner and ruin the controls well before the boiler quits. If yours has sat in water, have it looked at before the cold weeks; it’s often a parts job.
What the county says about boilers in Catharpin.
Prince William County
Prince William County requires a permit to replace a gas or propane furnace or a gas appliance such as a water heater, even like for like. Replacing an electric water heater with one the same size in the same spot needs no permit. Source.
Prince William County lists any work that alters a home’s heating and air conditioning as permit work, but swapping an electric furnace, heat pump or air conditioning condensing unit for the same type of unit in the same spot is an ordinary repair that needs no permit. Source.
Prince William County Fire and Rescue lists furnaces and water heaters among the household sources of carbon monoxide, and says to put a CO alarm outside each sleeping area and on every level of the home and to test it monthly. Source.
Prince William County Fire and Rescue says to have a qualified technician inspect the heating system and chimneys every year, to make sure nothing blocks the fumes from venting out of the house. Source.
How to pick who works on your boiler in Catharpin.
Questions to ask anybody who quotes you, us included.
Will they look for old water damage?
In a low-lying house, ask the tech to check the burner and the controls for rust and the floor around the boiler for water marks. It’s a short look that changes whether a repair is worth doing.
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.
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 Catharpin.
How high does Little Bull Run get near Catharpin?
The NWS gauge at Artemus Road, about 2.1 miles south, puts minor flood stage at 4.5 feet, where water starts over the road. In July 2025 it passed that in under an hour and set its highest crest, 7.88 feet. In a low basement, keep the boiler’s controls up off the floor.
Can I keep my radiators and replace just the boiler?
Usually, if the piping and the radiators are sound. The $99 diagnostic checks the system pressure and the pipes first, and a condensing or combi boiler runs $12,782 to $16,500 installed if you go that way.
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 Gainesville
- Boiler repair and replacement in Haymarket
- Boiler repair and replacement in Centreville
- Boiler repair and replacement in Chantilly
- Boiler repair and replacement in Bristow
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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 Catharpin 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.