Open 24/7 for emergencies
A new boiler runs $9,900 to $16,500 installed, a tune-up is $99 a system, 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
Get your price in writing
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Boiler repair and replacement in Leesburg covers hot water systems on gas or propane, with prices set before work starts.
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
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 Leesburg
About one in four owner homes inside the Town of Leesburg were built before 1980. Those older structures, particularly in the Old and Historic District, are where hot water boilers still hold their ground. In Lansdowne, the median home is from 2005, so a boiler there is the exception rather than the rule. If you have one, it is likely a specific design choice or a leftover from an older setup, not the standard configuration for that neighborhood. This distinction matters because the permit and review paths differ depending on whether you are inside the town limits or on the county side.
Loudoun County issues the permits for boiler work in both areas. In the Old and Historic District, the Town requires a Certificate of Appropriateness for exterior changes. A new condensing boiler vents through a small plastic pipe in a wall or roof. That pipe is an exterior alteration. You need Town approval before we drill. We can help you talk to preservation staff, but the decision is theirs. If your current boiler vents up a chimney, that is a different setup, and the guidelines ask owners to keep those chimneys in place.
We handle repair, replacement, and tune-ups for hot water boilers on natural gas or propane. We do not do steam, radiant floors, or oil. If you are thinking about switching to a heat pump, we can price that too. A new condensing boiler or Navien combi runs $12,782 to $16,500 installed. A cast iron replacement sits in the $9,900 to $16,500 range. In the Old and Historic District, the vent the Town will approve can decide between Navien, Weil-McLain and Force before the price does. The diagnostic is $99, and the tune-up is $99 a system.
A dripping relief valve usually means the pressure is near 30 psi, which points to an expansion tank or fill valve issue. Cold at the top of a radiator is often air, which is a quick fix. A rumble like a kettle about to boil is kettling: sludge or scale built up in the heat exchanger. Hear that from a boiler in one of the Town’s pre-1980 houses and it is time for a visit. We check the pressure, the expansion tank, and the circulator during a visit to make sure the system stays balanced before a part fails.
Neighborhood by neighborhood
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 |
|---|---|---|---|---|
| Leesburg | 1996 | single-family houses, about 4 in 10 | gas, about 7 in 10 | 1980s and 90s houses, mostly forced air; boilers in the older ones. |
| Lansdowne | 2005 | condo and apartment buildings, about 4 in 10 | gas, about 8 in 10 | Built since 2000, almost all forced air. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
Inside the town limits: the Old and Historic District downtown, Exeter and Carrvale inside the bypass, Potomac Station and Edwards Landing outside it.
Lansdowne only. It’s the one Census place outside the town limits, so the farms and lots beyond it aren’t in these figures.
What it’s telling you
That is usually air in the pipes. It is cheap to bleed. If the whole system is cold or the boiler is short-cycling, the circulator or the pressure might be off. A $99 diagnostic finds the cause before you spend money on a new unit. It is better to know in October than in January.
A new Weil-McLain gas boiler installed by SwiftPro in a Northern Virginia basement, with copper near-boiler piping and a bank of Taco zone valves feeding the heating loops.
Safety and paperwork
Inside the Town of Leesburg, Loudoun County issues the gas, plumbing and mechanical permits for a water heater replacement. The Town says a swap with no work on the outside of the building probably needs no Town permit. Source.
Inside the town limits, fire and rescue is Loudoun County’s system, answered from the Leesburg Volunteer Fire Company’s Station 1 on West Loudoun Street and Station 20 on Plaza Street, so the county’s heating and carbon monoxide advice applies in town just as it does in Lansdowne. Source.
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.
Our Virginia Class A contractor license, 2705192276, is on the side of the van.
Choosing who works on it
Questions to ask anybody who quotes you, us included.
In Leesburg, a new vent pipe is an exterior change. If the crew doesn’t ask about the Certificate of Appropriateness, they might show up to drill and find out they can’t. Ask if they have worked in the Old and Historic District before and how they handle the review process with the Town.
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.
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
5.0 stars across 1,132 reviews. Read them on our reviews page.
…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.
Where we work
Next door to Leesburg: Paeonian Springs, Hamilton, Waterford, Ashburn and Middleburg.
Questions
No. Loudoun County issues the building and trade permits inside the town limits. The Town’s role is zoning and historic review. If your house is in the Old and Historic District, you need their Certificate of Appropriateness for any exterior work, like a new vent pipe. The County handles the gas and mechanical permits.
Yes, if your house has ducts or you are willing to add a ductless system. We can price both options. A boiler replacement is $9,900 to $16,500 installed, and a heat pump is a different job with different costs. We will walk you through the trade-offs based on your house’s layout and your comfort goals.
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
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 Leesburg 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.