Open 24/7 for emergencies
AC replacement in Leesburg runs $5,942 to $14,450 installed, with the gas furnace you have left in place.
Price range
$5,942-$14,450
8yrs @ 7.99%
$84/mo
15yrs @ 9.99%
$64/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
5.0 stars across 1,131 reviews
One of our HVAC technicians moving a new condenser up a driveway, the van behind him.
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
The same price book our estimator runs on, for a central air conditioner on its own, keeping the furnace you have. A single-stage unit on a small house sits near the bottom; a variable-speed one on a big house, near the top.
A central air conditioner alone, keeping your furnace, installed
$5,942 to $14,450
or $99/mo at 0% APR for 60 months
An air conditioner and furnace together, installed
$8,898 to $23,000
or $148/mo at 0% APR for 60 months
A heat pump in the AC’s place, installed
$8,499 to $21,650
or $142/mo at 0% APR for 60 months
Diagnostic visit, if it may be worth fixing
$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
The HVAC replacement cost estimator narrows it to your house. Then a tech measures, and you get the installed price in writing before anything is ordered.
With Comfort+ membership at $199 a year, the diagnostic visit is included, and half of each repair bill is banked toward replacing that system, up to $1,500.
What’s different in Leesburg
Gas heats two owner homes in three inside the town limits and close to eight in ten in Lansdowne, so the usual cooling job on a Leesburg address is the one this page prices: a new condenser outside and a matching coil set on the furnace that stays. In town, four homes in ten went up between 1980 and 1999, and few of those still run builder equipment. Their furnaces and air conditioners mostly got replaced one at a time, so the two labels can sit years apart, and when the AC is the older one, it can go by itself.
Lansdowne, outside the town limits on 20176 mail, is the younger side: its median owner home dates to 2005, and about nine homes in ten there were built since 2000. A condenser that came with one of those houses has seen close to twenty summers, past the 18 or so years federal planners figure for central air in Virginia. Units set before 2010 most likely run on R-22, out of production since 2020; from 2010 on it’s R-410A, which can still be serviced. With the builder’s furnace under the coil just as old, price the pair, $8,898 to $23,000, beside the AC alone.
Downtown is where the outdoor unit draws the most attention. The Old and Historic District’s design guidelines want mechanical units on the side or rear, screened from public view with plantings or a fence, and call rooftop units facing the street inappropriate. The Town asks for a Certificate of Appropriateness on all exterior alterations there, in-kind replacement included, so even a new condenser on the old pad is worth a call to preservation staff first. They keep office hours at 15 North King Street on Wednesdays, and the call belongs before the order, not after.
About three homes in ten in town are townhouses, their condensers in a row out back, often a few feet apart or tucked under a deck. A new AC has to fit that same slot and still breathe, so the cabinet’s footprint and height matter as much as its capacity. In Lansdowne close to four homes in ten are condos, and the association documents say who owns the outdoor unit and where a replacement may sit. About three in ten homes in town are rented; there the owner makes the call, so tell us whose name goes on the quote.
Neighborhood by neighborhood
Census figures for the owner-occupied homes in each place, and what that usually means for the AC that’s there now.
| Place | Median home built | Most homes are | Heated with | The AC there now |
|---|---|---|---|---|
| Leesburg | 1996 | single-family houses, about 4 in 10 | gas, about 7 in 10 | 1980s and 90s houses, many on their second air conditioner. |
| Lansdowne | 2005 | condo and apartment buildings, about 4 in 10 | gas, about 8 in 10 | Builder air conditioners, many now near twenty years old. |
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.
When it’s time
Read the dates on both labels. In a Leesburg house from the 1980s or 90s, the furnace and the condenser were often replaced in different years, and when the AC is the older one, it can be the only thing replaced. The new coil sits on the furnace you keep, so its cabinet width and blower get checked first. A $99 diagnostic tells you if the old AC still deserves a repair.
An air conditioner put in before 2010 most likely holds R-22, which hasn’t been made since 2020. A leak on one of those usually ends the repair road.
A house from the 2000s often cools with the condenser it was built with. Past fifteen years, compressors and fan motors start to go, one after another.
Choosing who installs it
Questions to ask anybody who quotes you, us included.
Some Leesburg addresses sit outside the Town’s corporate limits, and Public Works will confirm which side yours is on. It matters most downtown, where outdoor equipment in the Old and Historic District goes through the Town’s review; in Lansdowne it’s the association. Whoever quotes the job should know which applies before choosing a spot for the condenser.
Ask how they picked the size. Copying the old nameplate repeats whatever was guessed when the house was built.
The outdoor unit and the coil on the furnace are rated as a pair. Ask whether the quote replaces both, and what happens to the line set.
A good company puts the repair price next to the replacement range and lets you choose. Already holding somebody’s big number? Take the free second opinion first.
Two of our crew going over a work order before the day's calls.
From our Google reviews
5.0 stars across 1,131 reviews. Read them on our reviews page.
On spec and on price for our A/C replacement. Showed up on time and all went as promised
Where we work
Next door to Leesburg: Paeonian Springs, Hamilton, Waterford, Ashburn and Middleburg.
Questions
Usually, if it fits and can breathe. A condenser pulls air in through its sides and throws the heat out the top, and boards overhead send that heat right back down into it. The new unit’s height and clearances get measured against the old spot before anything is ordered. Moving it is a bigger change, and in an association community the documents decide where it may go.
Likely a heat pump system. Close to three owner homes in ten in town heat with electricity, and here that usually means a heat pump with an air handler, not a furnace. Its outdoor unit heats and cools, so replacing it means another heat pump, $8,499 to $21,650 installed, rather than an AC on its own. In Lansdowne it’s about one owner home in five.
$5,942 to $14,450 installed for a central air conditioner on its own, keeping the furnace you have; size and efficiency set where yours lands. An AC and furnace together run $8,898 to $23,000. The HVAC replacement cost estimator gives your house its own number.
It’s worth pricing. A heat pump cools exactly like an AC and also heats on mild days, so with your gas furnace it becomes dual fuel. A heat pump system runs $8,499 to $21,650 installed, and we’ll price it both ways.
Ready when you are
Call, or send the form at the top. A tech measures the house and puts the installed price in writing before anything is ordered, and if the old AC is worth fixing, you’ll hear that first.
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 1,131 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.