Boiler repair and replacement in Leesburg.
Boiler repair and replacement in Leesburg covers hot water systems on gas or propane, with prices set before work starts.
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
Leesburg boilers: older homes, historic vents, and a town that watches the outside.
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 $69 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.
Where the boilers are across Leesburg.
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. |
Leesburg houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
The Town of Leesburg
Inside the town limits: the Old and Historic District downtown, Exeter and Carrvale inside the bypass, Potomac Station and Edwards Landing outside it.
- Median home built1996 Census
- Built before 1980about 2 in 10 Census
- Built since 2000about 4 in 10 Census
- Most homes aresingle-family houses, about 4 in 10 Census
- Heated withgas, about 7 in 10 Census
- Rentedabout 3 in 10 Census
- 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.
- Most homes here heat with gas, so a boiler tune-up here starts with the gas pressure and the flame.
The Loudoun County side
Lansdowne only. It’s the one Census place outside the town limits, so the farms and lots beyond it aren’t in these figures.
- Median home built2005 Census
- Built before 1980hardly any Census
- Built since 2000about 9 in 10 Census
- Most homes arecondo and apartment buildings, about 4 in 10 Census
- Heated withgas, about 8 in 10 Census
- Rentedabout 3 in 10 Census
- 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 boiler repair and replacement cost in Leesburg.
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 Leesburg.
A radiator is cold at the top
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.
What the county says about boilers in Leesburg.
Town of Leesburg
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
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.
How to pick who works on your boiler in Leesburg.
Questions to ask anybody who quotes you, us included.
Do they know the Town’s historic district rules?
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.
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 Leesburg.
Does the Town of Leesburg issue the boiler permit?
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.
Can I swap my boiler for a heat pump in Leesburg?
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.
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 Paeonian Springs
- Boiler repair and replacement in Hamilton
- Boiler repair and replacement in Waterford
- Boiler repair and replacement in Ashburn
- Boiler repair and replacement in Middleburg
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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 Leesburg 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.