Open 24/7 for emergencies
A new AC for a Woodbridge house with a gas furnace costs $5,942 to $14,450 installed. Dale City, Lake Ridge and Leesylvania age differently.
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
Send this and the office calls or texts you back to set a time.
We’ll call or text this number about your request. By sending it you agree to our terms and privacy policy.
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 Woodbridge
Six Census places carry Woodbridge mail, and fuel splits them. Dale City, the biggest at 17,021 owner homes, leans on gas, so the unit behind a Dale City house is usually a cooling-only condenser with its coil on the furnace, the kind that can be replaced by itself. Lake Ridge runs about half and half. Potomac Mills, 881 of 1,304 owner homes on electricity, is mostly heat pumps instead.
More than a quarter of Dale City’s homes went up in the 1970s, so a house from then is usually on its third air conditioner, cooling through ductwork drawn for the first. That’s where a new AC gets sized against what those ducts can actually move, not the label on the old condenser. A unit too big for its ducts runs loud and short and pulls less water out of a humid July.
Lake Ridge peaked in the 1980s around a 1985 median, and its gas half cools the way Dale City does, many of those condensers second-round units from around the turn of the century. The Lake Ridge Parks and Recreation Association, about 7,200 homes, sends exterior alterations to its Architectural Committee. A condenser going back on the old pad is the simplest case to ask about; a bigger pad or a new spot means an application before the work.
Leesylvania and County Center are the young end, about eight homes in ten built after 2000 around a 2006 median, most of them on gas. Builder condensers there are nearing twenty, and the ones made before 2010 probably run R-22. Check the furnace’s plate before deciding: if it’s the same 2006 original, price the pair at $8,898 to $23,000 next to the AC alone; if it was replaced already, the AC by itself is the job.
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 |
|---|---|---|---|---|
| Dale City | 1983 | single-family houses, about 7 in 10 | gas, about 7 in 10 | 1980s and 90s houses, many on their second air conditioner. |
| Lake Ridge | 1985 | townhouses, about 4 in 10 | electricity, about 5 in 10 | Mostly electric heat, so the cooling is usually a heat pump. |
| Woodbridge | 1976 | single-family houses, about 4 in 10 | gas, about 5 in 10 | Gas furnaces with central air, often on the second or third AC. |
| Leesylvania | 2006 | single-family houses, about 4 in 10 | gas, about 6 in 10 | Builder air conditioners, many now near twenty years old. |
| Potomac Mills | 1988 | single-family houses, about 6 in 10 | electricity, about 7 in 10 | Mostly electric heat, so the cooling is usually a heat pump. |
| County Center | 2006 | townhouses, about 4 in 10 | gas, about 6 in 10 | Townhouse condensers in tight side yards and on decks. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
When it’s time
In a 1970s Dale City house that’s usually the ducts, not the air conditioner. Two replacements in, a new condenser won’t fix a room the original duct layout never served well. Have the airflow measured before anyone picks a size; sometimes the right answer is a duct change and a smaller unit.
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
Prince William County lists any work that alters a home’s heating and air conditioning as permit work, but swapping an electric furnace, heat pump or air conditioning condensing unit for the same type of unit in the same spot is an ordinary repair that needs no 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.
A moved condenser, or an AC traded for a heat pump, is Prince William permit work, and the county wants the hired contractor listed as the permit holder. A homeowner who signs the Statement of Exemption and then knowingly hires an unlicensed contractor commits a Class 1 misdemeanor. Ask before anything is filed.
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.
Alex was very professional and the 2 technicians Oscar, and Derek was fast and efficient. They replace my A/C unit within the next day
Where we work
Next door to Woodbridge: Dumfries, Lorton, Triangle, Fairfax Station and Quantico.
Questions
Access and paperwork. About three homes in ten in the Woodbridge CDP sit in condo and apartment buildings, where the air handler may hang over a neighbor’s ceiling and the condenser may stand on association ground. The condo documents say who owns that spot and who approves a change.
Waiting is fair if it cools and doesn’t leak, as long as you plan rather than react. A 2006 unit likely holds R-22, so its first leak means reclaimed refrigerant, and July is a bad week to shop. If it’s acting up, the $99 diagnostic says how much summer it has left.
$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 Woodbridge 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.