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Reston AC replacement, a new condenser and coil on your gas furnace, runs $5,942 to $14,450 installed. 20190 and 20194 lean gas; 20191 doesn’t.
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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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 Reston
Reston is heating-and-cooling country for us: HVAC is a bigger share of the work there than in any other town where we work regularly, and so is duct cleaning. Which job a tired outdoor unit turns into depends on the ZIP. In 20190, from Lake Anne to Reston Town Center, 68.9 percent of owners heat with gas, and in 20194 around North Point, 65.6 percent. Those houses keep the furnace and take an AC on its own. Around Hunters Woods and South Lakes in 20191, 59 percent heat with electricity, so the unit out back is usually a heat pump and gets priced as one, $8,499 to $21,650.
North Point and the rest of 20194 went up in a rush: 86 percent of its homes date from the 1980s and 1990s. The builders’ condensers there are long gone, and plenty of the replacements went in before 2010, the year the EPA barred new air conditioners built for R-22. So the unit on the pad now is often a second-generation R-22 condenser, fifteen to twenty years old, feeding a coil on the furnace. Great Falls Crossing, about 500 owner homes with 20194 mail, mostly single-family houses from around 1993, is on the same arc.
Reston Association has a test for the new outdoor unit, and passing it means no application. The unit goes in the approved location, stands no more than four feet tall, and carries acoustical specs equal to or better than the old one’s. Some higher-efficiency condensers stand taller than the 1990s models they replace, so the model gets checked against those three before it’s ordered. Miss any of them in a cluster, and the application needs a cluster officer’s signature and two neighbors’. RA’s Design Review Board can also ask for plantings or a structural screen, provided the tech can still get to the unit.
In 20190, 53 percent of homes sit in condo and apartment buildings and 52 percent of occupied homes are rented, so the AC there often belongs to an owner who lives elsewhere and sits on a pad or roof the association controls. Start with the condo documents and the owner. At a single-family house, a condenser moved to a new spot skips RA’s application only at the rear or side, hidden from view, at least 50 feet from neighboring buildings and 20 feet from the lot line. Fairfax County issues the mechanical permit and wants an A2L certification with any unit on the newer refrigerants.
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 |
|---|---|---|---|---|
| Reston | 1981 | condo and apartment buildings, about 4 in 10 | gas, about 5 in 10 | 1980s and 90s houses, many on their second air conditioner. |
| Great Falls Crossing | 1993 | single-family houses, about 9 in 10 | gas, about 8 in 10 | 1980s and 90s houses, many on their second air conditioner. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
When it’s time
When the outdoor fan runs, the copper line stays warm and the rooms keep climbing, the compressor is often the part that quit. On a North Point condenser from before 2010, that means an R-22 unit has lost its costliest part, and a new compressor in an old cabinet seldom makes sense. A $99 diagnostic confirms it before anyone writes a replacement price.
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.
It’s the pump at the heart of the outdoor unit and its costliest part. Out of warranty on an older unit, the repair can come close to half the price of a new AC, the point where Goodman says replacing may be the better money.
Permits, locally
Our Virginia Class A contractor license, 2705192276, is on the side of the van.
Choosing who installs it
Questions to ask anybody who quotes you, us included.
In a Reston cluster the ground around the house is often Cluster Common Area, which the cluster association owns and keeps up. A condenser that needs a bigger pad, a new spot or a new line route touches that ground. Ask the installer to confirm who owns the pad and what the cluster’s standards say before the quote is final, so approval doesn’t hold up the job.
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 Reston: Herndon, Great Falls, Oakton, Vienna and Sterling.
Questions
Only if something else heats the house. In 20191, 59 percent of owners heat with electricity, and in most of those homes the heat pump is the heat. Put a cooling-only unit in its place and the electric strips in the air handler would be all the heat you have left. Price a heat pump at $8,499 to $21,650; if a gas furnace sits under the coil, the AC range applies.
Read both labels. A house from around 1993 is usually on its second outdoor unit, and one installed before 2010 most likely holds R-22. Most owners there heat with gas, so the furnace under the coil could be the newer half or the older one. If the furnace is sound, an AC on its own fits; if both are tired, look at the pair at $8,898 to $23,000.
$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 Reston 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.