Your house sits near the Town line
Montclair, Cherry Hill and the Town all carry Dumfries addresses, but a boiler permit goes to a different office on each side. Settling which one before the boiler is ordered keeps the job from stalling.
Dumfries, Virginia
Boiler repair and replacement in Dumfries.
Dumfries boilers split between Town Hall and County permits; a tune-up is $99 and a new boiler $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.
We’ll call or text this number about your request. By sending it you agree to our terms and privacy policy.
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 Dumfries.
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 Dumfries
In Dumfries the boiler permit depends on which side of the Town line you’re on.
Inside the Town of Dumfries the typical owner’s house went up in 1985, and about four in ten are older than 1980; those older houses are where a hot water boiler turns up. Montclair and Cherry Hill on the County side are newer, so a boiler there is rarer still. Gas heats a little under half the Town’s owner homes and electricity just over half, which is why a Dumfries boiler is usually gas-fired.
The permit office is the real difference. Inside the Town limits, a gas or propane boiler replacement is permit work at Town Hall, which enforces Virginia’s building code and doesn’t exempt gas-fired appliances. Outside the line it’s Prince William County, which also wants a permit for gas or propane; an electric boiler swapped for the same type in the same spot needs none there. That’s two permit offices behind one Dumfries mailing address, which is why the address check comes before the quote.
In the Town’s historic district, a new vent opening needs a certificate of appropriateness from the zoning administrator, which matters when a condensing boiler, at $12,782 to $16,500 installed, would vent through a side wall. A cast iron boiler kept on the chimney avoids the new opening, though a water heater left alone on that chimney may need its flue looked at.
Dumfries has plenty of townhouses, roughly four in ten of the Town’s owner homes, and in one of those a dripping relief valve usually traces back to an expansion tank that has lost its air charge, so the pressure climbs every time the boiler fires. Recharging or replacing that tank costs a fraction of a boiler, and the $99 diagnostic is how you find out that’s all it was.
Neighborhood by neighborhood
Where the boilers are across Dumfries.
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 |
|---|---|---|---|---|
| Montclair | 1989 | single-family houses, about 8 in 10 | electricity, about 5 in 10 | Mostly heat pumps; a boiler is the exception. |
| Cherry Hill | 2005 | townhouses, about 4 in 10 | gas, about 7 in 10 | Built since 2000, almost all forced air. |
| Dumfries | 1985 | townhouses, about 4 in 10 | electricity, about 5 in 10 | Mostly heat pumps; a boiler is the exception. |
By the numbers
Dumfries houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
The Town of Dumfries
Nearly all of the Town sits in 22026, with a sliver in Triangle’s 22172. None of it is in 22025.
- Median home built1985 Census
- Built before 1980about 4 in 10 Census
- Built since 2000about 1 in 10 Census
- Most homes aretownhouses, about 4 in 10 Census
- Heated withelectricity, about 5 in 10 Census
- Rentedabout 2 in 10 Census
- Some homes here run on propane, and a propane boiler gets the same tune-up, checked against propane’s gas pressure.
- 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.
The Prince William County side
Montclair in 22025, where the Postal Service accepts Montclair as the town name; Southbridge and Cherry Hill in 22026, outside the town line.
ZIPs 22025 and 22026 as a whole: Montclair, Cherry Hill and the rest of Dumfries mail, the Town’s homes included.
What it’s telling you
What your boiler is telling you in Dumfries.
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 Dumfries.
Town of Dumfries
The Town of Dumfries enforces Virginia’s statewide building code through its own building department, and that code exempts swapping a home’s mechanical appliance only when it isn’t fueled by gas or oil. Inside the town limits, a gas or propane furnace or water heater replacement is permit work at Town Hall, not Prince William County. Source.
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.
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 Dumfries.
Questions to ask anybody who quotes you, us included.
Do they check whether you’re inside the Town limits?
Ask the installer to confirm it from your address. Town Hall or Prince William County: filing with the wrong one stalls the job.
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.
…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
Boiler repair and replacement in every Northern Virginia town we serve
Next door to Dumfries: Triangle, Quantico, Woodbridge, Lorton and Stafford.
Fairfax County
Arlington County
Loudoun County
Prince William County
Fauquier County
Stafford County
Questions
Boiler questions from Dumfries.
Does a boiler repair in Dumfries need a permit?
A repair doesn’t. Replacing a gas or propane boiler does, at Town Hall inside the Town limits or with Prince William County outside them.
Will a new vent need approval in the historic district?
Yes: a new vent opening there needs a certificate of appropriateness from the zoning administrator. Ask before a condensing boiler’s plastic vent goes through an old wall.
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 Dumfries 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.