The radiators knock when the heat comes on
A knock as the heat starts is usually air in the loop or a pipe moving against the framing as it warms. Air is a quick fix, and the $99 diagnostic tells you which one you have.
Warrenton, Virginia
Boiler repair and replacement in Warrenton.
Warrenton boiler work splits between the Town and the County side. A tune-up is $99, a new unit is $9,900 to $16,500. Permits depend on your address.
$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
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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 Warrenton.
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 Warrenton
Warrenton boilers split between the Town and the County side
The median owner home in the Town of Warrenton was built in 1993, and about six in ten heat with gas. That puts a lot of these houses in the forced-air era, so a hot water boiler is the exception here, not the rule. In New Baltimore and Vint Hill, the median owner home is from 1999, and nearly all are detached. Gas is the top fuel there too, at about half of owner homes. If you have a boiler in either area, it is likely in a home built before 1980, since about three in ten Town homes and a quarter of county-side homes date to that period.
Permits are the main difference between the two sides. Inside the Town limits, the Town of Warrenton’s Building office handles permits, and replacing a gas appliance requires one. Outside the limits, Fauquier County issues the permit, and trade permits go out over the counter the day the application comes in. If a boiler fails and you need to start work immediately, Virginia’s building code lets you begin before the permit is issued, as long as the application reaches the correct office by the end of the next working day.
In the Town’s Historic District, staff can approve small, compatible work like an in-kind replacement, but substantial exterior changes go to the Architectural Review Board, which meets monthly and wants applications by the 1st. If a new boiler would vent through a wall there, check before you book.
Pressure trouble on a Warrenton boiler often traces to the expansion tank: when its air charge drops, pressure rises and the relief valve drips. The $99 diagnostic confirms it before anyone prices a new boiler.
Neighborhood by neighborhood
Where the boilers are across Warrenton.
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 |
|---|---|---|---|---|
| New Baltimore | 1999 | single-family houses, nearly all | gas, about 5 in 10 | 1980s and 90s houses, mostly forced air; boilers in the older ones. |
| Warrenton | 1993 | single-family houses, about 5 in 10 | gas, about 6 in 10 | 1980s and 90s houses, mostly forced air; boilers in the older ones. |
By the numbers
Warrenton houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
The Town of Warrenton
Inside the town limits, a little over 4 of the roughly 110 square miles the two Warrenton ZIP codes cover: the Historic District around Main Street, Leeds Square, and the streets off Broadview Avenue and Alwington Boulevard.
- Median home built1993 Census
- Built before 1980about 4 in 10 Census
- Built since 2000about 3 in 10 Census
- Most homes aresingle-family houses, about 5 in 10 Census
- Heated withgas, about 6 in 10 Census
- Rentedabout 4 in 10 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.
- Most homes here heat with gas, so a boiler tune-up here starts with the gas pressure and the flame.
The Fauquier County side
New Baltimore only. It’s the one Census place on the county side with mostly Warrenton mail, so the farms and lots beyond it aren’t in these figures.
- Median home built1999 Census
- Built before 1980about 3 in 10 Census
- Built since 2000about 5 in 10 Census
- Most homes aresingle-family houses, nearly all Census
- Heated withgas, about 5 in 10 Census
- Rentedabout 1 in 10 Census
- Some homes here run on propane, and a propane boiler gets the same tune-up, checked against propane’s gas pressure.
- 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.
What it’s telling you
What your boiler is telling you in Warrenton.
An aging Peerless cast iron boiler in a Northern Virginia basement, chimney vented, on a SwiftPro service call.
Safety and paperwork
What the county says about boilers in Warrenton.
Town of Warrenton
The Town lists replacing a gas appliance, a water heater included, among the jobs that always need a permit. Swapping an electric water heater for one the same size in the same spot doesn’t. Source.
Inside the town limits, any work that alters a house’s plumbing, electrical or HVAC system is on the Town’s list of jobs that always need a permit. Source.
The fire company’s checklist also wants a carbon monoxide alarm on each level of the home, none of them more than seven years old. Source.
The Warrenton Volunteer Fire Company’s home safety checklist asks for the chimney and the furnace to be cleaned and inspected every year. Source.
Fauquier County
Outside the town limits, Fauquier County issues the permit. It wants one for any fuel-fired water heater, propane included, and for any heater being moved; an electric one swapped for a similar unit in the same spot counts as an ordinary repair. Trade permits go out over the counter the day the application comes in. Source.
Fauquier County counts swapping an electric appliance for a similar one in the same spot as an ordinary repair that needs no permit. Moving an appliance to a new spot takes one. Source.
Fauquier County Fire Rescue takes requests for help getting smoke and carbon monoxide alarms through a form on its Public Education page. 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 Warrenton.
Questions to ask anybody who quotes you, us included.
How do you know if the permit goes to the Town or the County?
Check your address. If it is inside the Town of Warrenton limits, the Town’s Building office handles the permit. If it is in New Baltimore or Vint Hill, Fauquier County issues it. We can tell you which office to call and what documents they need, but we do not file the permit for you.
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.
Replacement for my broken gas water boiler was professionally done and in a timely manner. The technicians knew exactly what they were doing.
Questions
Boiler questions from Warrenton.
Do you work on boilers in the Warrenton Historic District?
Yes, but exterior changes there need a Certificate of Appropriateness. If the venting or any exterior work is visible, you may need to apply to the Architectural Review Board. Town staff can approve small, compatible work, but substantial changes go to the board, which meets monthly and wants applications by the 1st.
Is my Warrenton boiler too old to repair?
Age alone does not decide it. In Warrenton, where about three in ten Town homes and a quarter of county-side homes date to before 1980, a failing pump, valve, or expansion tank is usually a repair, not a replacement. We recommend Navien, Weil-McLain, or Force for replacements, and we can also price a switch to a heat pump or a different fuel boiler if that fits your setup.
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 Warrenton 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.