Open 24/7 for emergencies
AC replacement in Falls Church runs $5,942 to $14,450 installed, City or county side, with the gas furnace or the boiler left alone.
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 Falls Church
Start with which government your house answers to, because Falls Church mail reaches well past the City limits: Merrifield, Seven Corners and Bailey’s Crossroads are Fairfax County. Inside the City, an air conditioner in a single-family house can be replaced without a permit, and for a townhouse or a condo unit, the counter at City Hall, 300 Park Avenue, is the place to ask. On the county side the same swap is mechanical permit work, and because new condensers run on the A2L refrigerants, Fairfax County wants its refrigeration certification filed alongside.
The oldest Falls Church houses sit on the county side: the typical owner home went up in 1957 in West Falls Church, 1958 in Lake Barcroft and 1961 in Pimmit Hills, and gas heats about seven in ten City homes and more on those streets. In those houses the coil rides on a basement furnace, the copper lines leave through the foundation wall, and the condenser sits on a pad beside the house. A house that age has gone through several air conditioners, often on ducts first laid out for heat, so the new one gets sized to what those ducts can move.
Falls Church is one of the two places, with McLean, where boilers are a regular part of our heating work. A radiator house never had ducts for its heat, so where it has central air, the air handler usually lives in the attic, with short runs to ceiling vents and a drain pan over the bedroom plaster. The job there is two pieces, the condenser in the yard and the cooling coil inside that attic air handler, and the boiler in the basement isn’t touched. Getting the old coil down and the new one up through the hatch is most of the work, so the attic gets a look before the price.
The City also has a younger layer. About 28 percent of its homes went up since 2000, and about 23 percent in Pimmit Hills, so a house finished in the early 2000s may still run the builder’s air conditioner, past twenty now and most likely on R-22. Inside the City, condo and apartment buildings hold close to half the homes, and tenants live in close to half. In a building the outdoor unit may share a roof or a pad, and the association decides where its replacement goes; in a rental, the owner makes the call.
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 |
|---|---|---|---|---|
| West Falls Church | 1957 | single-family houses, about 6 in 10 | gas, about 7 in 10 | Gas furnaces with central air, often on the second or third AC. |
| Bailey’s Crossroads | 1980 | condo and apartment buildings, about 6 in 10 | electricity, about 5 in 10 | Condo and apartment buildings: mostly heat pumps, few AC-only systems. |
| Idylwood | 1975 | condo and apartment buildings, about 4 in 10 | gas, about 5 in 10 | Condo and apartment buildings: compact condensers on shared pads and roofs. |
| City of Falls Church | 1964 | condo and apartment buildings, about 5 in 10 | gas, about 7 in 10 | Condo and apartment buildings: compact condensers on shared pads and roofs. |
| Lake Barcroft | 1958 | single-family houses, about 6 in 10 | gas, about 8 in 10 | Gas furnaces with central air, often on the second or third AC. |
| Seven Corners | 1972 | condo and apartment buildings, about 5 in 10 | gas, about 6 in 10 | Condo and apartment buildings: compact condensers on shared pads and roofs. |
| Pimmit Hills | 1961 | single-family houses, about 7 in 10 | gas, about 9 in 10 | Gas furnaces with central air, often on the second or third AC. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
ZIP 22046, plus a few City addresses in 22042 and 22044.
22041 to 22044: West Falls Church, Idylwood, Lake Barcroft, Seven Corners and Bailey’s Crossroads.
When it’s time
Plenty of Falls Church basements still feed a condenser installed before new R-22 systems ended. A dead fan motor or capacitor on one is a reasonable repair. A leak isn’t, because the refrigerant to refill it stopped being made in 2020 and gets dearer every season. Once it’s leaking, have the condenser and the coil on top of the furnace priced together, built for the same new refrigerant.
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.
The new coil sits on the furnace and uses its blower. When the furnace is the same age, replacing both usually costs less than two jobs a few years apart: $8,898 to $23,000 for the pair.
Permits, locally
In a single-family house in the City of Falls Church, an air conditioner or heat pump can be replaced without a permit. Source.
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.
If your central air lives above the bedrooms, the coil up there is half the replacement. Ask whether the quote includes it, how it comes down through the hatch, and whether a new drain pan and float switch go under the new one. A price written from the yard covers only 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 Falls Church: Dunn Loring, Arlington, Annandale, McLean and Vienna.
Questions
Fairfax County’s. Pimmit Hills, like Idylwood, Seven Corners and Bailey’s Crossroads, sits outside the City, and the county treats an air conditioner swap as mechanical permit work, with a certification for the new A2L refrigerant. The City’s no-permit rule for single-family houses applies only inside its limits, so the mailing address can mislead you.
Maybe not. A Lake Barcroft house from the late 1950s may have gained an addition, new windows or a finished basement since, and its ducts were laid out for heat. Copying the old condenser’s size repeats whatever guess came before. Ask for a load calculation on the house as it stands, and an airflow check on the ducts, before anyone settles the size.
$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 Falls Church 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.