Furnace and AC replacement in Ashburn.
Furnace and AC replacement in Ashburn runs $8,898 to $23,000 installed. A builder’s pair is near twenty in Broadlands and Belmont, about fifteen in Brambleton.
- Your price range up front
- Sized to the house, not the old label
- Dedicated HVAC team
Get your new system priced
Ashburn’s systems went in street by street, and they come due street by street.
More of our Ashburn visits are about replacing a heating and cooling system than in any other town where we work regularly, and water heaters come up more than almost anywhere. Seven homes in ten here date from 2000 or later, and the newer neighborhoods were built out section by section. Every house on a street finished in the same season started its furnace and air conditioner the same month, and they’ve run the same hours ever since.
You can read that calendar off the Census. Broadlands’ typical owner home went up in 2004 and Belmont’s in 2005, so original pairs there are around twenty. Brambleton’s is from 2011 and Loudoun Valley Estates’ from 2013, which puts theirs between twelve and fifteen, the age when an outdoor unit’s first big repair tends to show up.
Ashburn Farm and Ashburn Village are a generation ahead. The typical owner’s house there is from 1998, about half the homes went up from 1980 through 1999, and most are on their second furnace and air conditioner already, not always bought in the same year. If yours were replaced at different times, look at the pair and the furnace alone, $4,285 to $14,040, side by side. When the younger half is within a few years of the older one, replacing both gets a coil, a furnace and an outdoor unit chosen to work together, not a new half bolted to a tired one.
The new outdoor unit will likely be bigger than the old one, so in Ashburn the pad matters. Ashburn Village’s architectural guidelines say as much about high-efficiency units and send any move to a new spot around the house to the review committee. In Brambleton a unit set back where the old one stood needs no application. Check that the pad takes the new cabinet before the order goes in.
The systems across Ashburn, place by place.
Census figures for the owner-occupied homes in each place, and what that usually means for a replacement.
| Place | Median home built | Most homes are | Heated with | What the system usually is |
|---|---|---|---|---|
| Ashburn | 1998 | single-family houses, about 4 in 10 | gas, about 8 in 10 | 1980s and 90s houses, most on their second furnace and AC. |
| Brambleton | 2011 | townhouses, about 5 in 10 | gas, about 8 in 10 | Townhouse systems: a furnace in a closet or attic, the air conditioner out back. |
| Broadlands | 2004 | single-family houses, about 6 in 10 | gas, about 9 in 10 | Many still on the builder’s furnace and air conditioner. |
| Loudoun Valley Estates | 2013 | townhouses, about 6 in 10 | gas, about 8 in 10 | Townhouse systems: a furnace in a closet or attic, the air conditioner out back. |
| Belmont | 2005 | single-family houses, about 6 in 10 | gas, about 9 in 10 | Many still on the builder’s furnace and air conditioner. |
| Moorefield | 2015 | townhouses, about 6 in 10 | gas, about 7 in 10 | Townhouse systems: a furnace in a closet or attic, the air conditioner out back. |
| One Loudoun | 2015 | townhouses, about 4 in 10 | gas, about 7 in 10 | Townhouse systems: a furnace in a closet or attic, the air conditioner out back. |
| University Center | 1996 | condo and apartment buildings, about 4 in 10 | gas, about 8 in 10 | Condo closet systems: small units, often with association rules for the outdoor half. |
Ashburn houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
Ashburn
- Built before 1980hardly any Census
- Built since 2000about 7 in 10 Census
- Most homes aresingle-family houses, about 4 in 10 Census
- Heated withgas, about 8 in 10 Census
- Rentedabout 3 in 10 Census
- Many houses here still run the builder’s furnace and AC, and the two tend to wear out together.
- Townhouse furnaces sit in closets and attics, so the path in matters as much as the size.
What a new furnace and AC costs in Ashburn.
$8,898 to $23,000 installed for a furnace and air conditioner replaced together, 2 to 5 ton, from the same price book as our estimator. Where you land depends on the size of the house, the efficiency you pick, and what the ductwork and venting need.
- Furnace and AC together, installed$8,898 to $23,000
- Furnace alone, keeping your AC$4,285 to $14,040
- Heat pump system instead$8,499 to $21,650
The HVAC replacement estimator gives your house its own number. Then we measure, and the price is in writing before anything is ordered.
Two years of labor come with every install. Monthly plans are on our financing page.
When replacing both makes sense in Ashburn.
New outdoor units are going in all down your street
Houses finished in the same season started their systems together. When the neighbors start replacing theirs, yours has the same years on it, and pricing it in April beats deciding in the first August heat wave.
Both halves went in with the house
Plenty of houses built since 2000 still run the builder’s furnace and AC. They wear out on about the same schedule, so when one goes, price the pair.
The AC died and the furnace is the same age
A new outdoor unit needs a matching coil, and on a gas system the coil sits on the furnace. If the furnace is as old, do both and open that closet once.
Who signs off on a new system in Ashburn.
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.
How to pick who replaces your furnace and AC in Ashburn.
Ask every company that quotes the job, us included.
Did they ask how the house has changed since the builder sized it?
A finished basement, a sunroom or a garage turned into a bedroom adds space the original system never counted. In a 2004 Broadlands or 2011 Brambleton house, size the new pair for the rooms you heat and cool today, with the ducts checked to carry it.
Do they size it to the house, or copy the old label?
The old size is a guess somebody made years ago. Ask whether they measure the house and check the ductwork first. Too big short cycles; too small runs all afternoon in August.
Is the whole job in the written price?
Furnace, outdoor unit, matching coil, refrigerant lines, thermostat, permit and hauling the old one away. If it isn’t on the paper, ask.
Already holding another company’s quote?
Our free second opinion looks at the system you were quoted on and tells you what it actually needs, with our price if you want it.
What our customers say.
They replaced my AC system and got it up and running with great service. Moises and Efrain are great!
5.0 stars across 884 Google reviews. Read them on our reviews page.
Furnace and AC replacement questions from Ashburn.
Should a Moorefield townhouse replace its furnace and AC yet?
Usually not. Moorefield’s typical owner home is from 2015, so a system there is around ten, young enough that most failures are parts. Start with a $99 diagnostic visit; the repair gets priced before any work starts.
Can I go with a heat pump instead of a new furnace and AC?
Yes. About one Ashburn owner in six already heats with electricity, a third in Moorefield. A heat pump system runs $8,499 to $21,650 installed, and the HVAC replacement estimator prices either kind for your house.
How much does a new furnace and AC cost in Ashburn?
$8,898 to $23,000 installed for the pair, by size and efficiency. A furnace alone, keeping your AC, is $4,285 to $14,040. The HVAC replacement estimator gives your house its own number.
Do I have to replace both at the same time?
No. If the AC is young and only the furnace failed, replace the furnace. If they’re the same age, do both: a new outdoor unit needs a matched coil, and one built for the old refrigerant isn’t rated for the new one.
Furnace and AC replacement in the towns next door.
- Furnace and AC replacement in Sterling
- Furnace and AC replacement in Leesburg
- Furnace and AC replacement in Aldie
- Furnace and AC replacement in Herndon
- Furnace and AC replacement in Chantilly
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Start with your number, then a written quote.
Call, book online, or take the HVAC replacement estimator first. We measure before we quote, and if a repair makes more sense than a new system, you’ll hear that first.
SwiftPro Heating, Cooling & Plumbing is a licensed, BBB Accredited (A rating), independently owned heating, cooling and plumbing company in Chantilly, serving Ashburn and the rest of Northern Virginia. Virginia contractor license #2705192276. 5.0 stars across 884 Google reviews. 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.