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A one-zone ductless mini split in Fairfax Station runs $7,000 to $10,000 installed, for a room the central air misses. The estimator quiz prices up to six.
Price range
$7,000-$10,000
8yrs @ 7.99%
$99/mo
15yrs @ 9.99%
$75/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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One of our HVAC technicians with a new Trane outdoor unit he just installed.
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
Installed, from the price book our HVAC price estimator runs on. A zone is one room with its own indoor head, and you get the price in writing before you decide.
Ductless mini split, one zone, installed
$7,000 to $10,000
or $117/mo at 0% APR for 60 months
Ductless mini split, two zones, installed
$11,000 to $15,000
or $183/mo at 0% APR for 60 months
Ductless mini split, three zones, installed
$12,500 to $18,000
or $208/mo at 0% APR for 60 months
Ductless mini split, four zones, installed
$16,000 to $21,000
or $267/mo at 0% APR for 60 months
Ductless mini split, five zones, installed
$19,000 to $25,000
or $317/mo at 0% APR for 60 months
Ductless mini split, six zones, installed
$23,000 to $30,000
or $383/mo at 0% APR for 60 months
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
Where you land in a range is mostly the distance from the outdoor unit to the room, the kind of head and the room left in the electrical panel.
The second zone costs the most because it often needs a bigger outdoor unit. Our mini split cost guide explains.
What’s different in Fairfax Station
Plenty of Fairfax Station basements started out unfinished. In a house from the 1980s the main ducts hang from the basement ceiling to feed the floors above, and when the lower level became a family room, an office or a guest suite, it usually got a couple of registers cut into those trunks and nothing more. It runs cold all winter and clammy in July, on a thermostat two floors up that only cares how the kitchen feels.
About 1 in 8 homes in 22039 is older than 1980, and about 150 predate 1960. A house that age has often been added onto, a den at the back, an enclosed porch, a bedroom over a later garage, each tied into ductwork drawn for the original rooms, and some of the oldest were never ducted for cooling at all. A head gives the room the ducts can’t reach its own heat and air, with no new duct runs through the walls.
On a five-acre lot the space that needs it may not be in the house at all. A workshop in a detached garage, a studio, an office over the barn: a single-zone system puts one head inside and one outdoor unit against the building, with nothing to run across the yard. If the building’s power feed is small, that gets checked before the price is final.
Most houses here already have central air in the main rooms, often two systems of it, so a ductless job tends to be a room or two, not the whole house. Where two rooms sit at opposite ends, ask for it priced both ways: one outdoor unit running two heads, or two single-zone systems with a short run each.
Neighborhood by neighborhood
Census figures for the owner-occupied homes in each place, and the room a ductless head usually ends up in.
| Place | Median home built | Most homes are | Heated with | Where ductless usually fits |
|---|---|---|---|---|
| Fairfax Station | 1982 | single-family houses, about 9 in 10 | gas, about 5 in 10 | 1980s and 90s houses: the bonus room, the sunroom, the far bedroom. |
| South Run | 1988 | single-family houses, nearly all | gas, about 9 in 10 | 1980s and 90s houses: the bonus room, the sunroom, the far bedroom. |
| Crosspointe | 1993 | single-family houses, nearly all | gas, about 8 in 10 | 1980s and 90s houses: the bonus room, the sunroom, the far bedroom. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
ZIP 22039 as a whole: every Fairfax Station address. The Fairfax Station Census place in the table also takes in streets with Fairfax mail.
When it’s the right call
A finished basement fed by a couple of registers off the main trunk never catches up in winter, and turning up the thermostat upstairs only overheats the bedrooms. A head on the lower level heats it on its own setting.
The bonus room, the sunroom, the bedroom over the garage. We check for a closed damper or a crushed duct first; sometimes that’s all it is.
An addition, a finished attic, a garage turned into a room. Stretching the ducts into it usually starves the rooms already on them.
Paperwork, locally
Our Virginia Class A contractor license, 2705192276, is on the side of the van.
Choosing who installs it
Questions worth asking anybody who quotes you, us included.
A head that’s cooling a room makes water, and it has to drain somewhere. On an outside wall above ground it usually runs out alongside the line set; in a lower level below grade, it often needs a small pump. Ask which yours gets.
If the room’s trouble is a closed damper or a crushed duct, a mini split is an expensive fix for a cheap problem. Ask what they checked first.
Ask whether it covers the line set run, the new circuit and putting the walls back, or only the equipment.
Two of our crew going over a work order before the day's calls.
From our Google reviews
5.0 stars across 1,132 reviews. Read them on our reviews page.
Swiftpro did an excellent job installing a minisplit unit for us in our sunroom. They were super professional.
Where we work
Next door to Fairfax Station: Burke, Clifton, Springfield, Fairfax and Annandale.
The system we put in first
Built to take a beating. Put in by our crew.
Heat lamps, snow and rain on one outdoor unit: that’s Trane’s own film. We’re a Trane Comfort Specialist, on Trane’s own dealer locator, and when you pick a Trane, our crew puts it in.
Films: Trane’s own.
Questions
Yes. Every ductless head has its own control, separate from the rest of the house, so the suite can run warmer or cooler than upstairs. A bedroom and a sitting room down there would be two zones, $11,000 to $15,000 installed.
Yes. Each room that needs it gets a head, each head runs to an outdoor unit through a small hole in the wall, and because nearly every ductless outdoor unit is a heat pump, the same heads heat in winter. Three rooms run $12,500 to $18,000 installed, and the estimator quiz goes up to six.
Installed, one zone is $7,000 to $10,000, two zones $11,000 to $15,000 and three zones $12,500 to $18,000, up to $23,000 to $30,000 for six. The HVAC price estimator gives your number.
Both. A ductless system is a heat pump, and cold-climate models keep heating well below freezing, which covers a Northern Virginia winter.
Ready when you are
Call, or send the form at the top. You get the installed price in writing before anything goes on the wall.
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 Fairfax Station and the rest of Northern Virginia. Virginia contractor license #2705192276. 5.0 stars across 1,132 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.