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A one-zone ductless mini split runs $7,000 to $10,000 installed in Dumfries, often for an older Town house, a Cherry Hill condo or a room added later.
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 Dumfries
Dumfries is older than Route 1 lets on. The Town was chartered in 1749, 84 of its homes went up before 1940, and Town records date Whitehaven’s houses from 1930 and Tripoli Heights’ from 1950. A house that old was built long before central air: some may still heat without ducts, and some have ducts laid out for a furnace and never sized for cooling. One head in the bedroom that never cools is usually simpler than new ductwork through finished walls.
If the house sits in the Town’s historic district, a mini split puts two things outside: the outdoor unit and the line set running down the wall. The Town Code wants a certificate of appropriateness for changes in the district and holds building permits there until one is approved. The zoning administrator decides whether the job is minor or goes to the Architectural Review Board, so ask before ordering, and plan on a side or back wall.
Cherry Hill is newer, and about one home in five there is in a building of ten units or more. If you own a condo in one, the outdoor unit can’t just go on the ground under your window: the association usually decides where it may sit or hang, a balcony, a wall bracket or the roof, and how the line set gets there. Get that answer first, because the line set’s length moves where you land in $7,000 to $10,000.
Montclair is mostly single-family, three houses in four, built largely from the 1980s on, and that’s where added rooms turn up: a screened porch closed in, space finished over the garage, a basement finished years later. None were on the original duct plan. One head on its own outdoor unit handles one room; two rooms sharing an outdoor unit run $11,000 to $15,000 installed.
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 |
|---|---|---|---|---|
| Montclair | 1989 | single-family houses, about 8 in 10 | electricity, about 5 in 10 | 1980s and 90s houses: the bonus room, the sunroom, the far bedroom. |
| Cherry Hill | 2005 | townhouses, about 4 in 10 | gas, about 7 in 10 | Townhouses: the top floor, where the HOA allows the outdoor unit. |
| Dumfries | 1985 | townhouses, about 4 in 10 | electricity, about 5 in 10 | Townhouses: the top floor, where the HOA allows the outdoor unit. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
Nearly all of the Town sits in 22026, with a sliver in Triangle’s 22172. None of it is in 22025.
Montclair in 22025, where the Postal Service accepts Montclair as the town name; Southbridge and Cherry Hill in 22026, outside the town line.
ZIPs 22025 and 22026 as a whole: Montclair, Cherry Hill and the rest of Dumfries mail, the Town’s homes included.
When it’s the right call
In an older Dumfries house, a window air conditioner in the same bedroom every summer usually means the ducts never reached that room, or reached it too small. A ductless head on the wall heats as well as cools and gives you the window back.
In a three-level townhouse the heat rises to the bedrooms, and one thermostat can’t please two floors. A head upstairs gives that floor 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.
Paperwork, 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 worth asking anybody who quotes you, us included.
In the Town’s historic district or a condo building, that’s somebody else’s call first. An installer who measures the room without asking may quote a spot you can’t use.
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 was responsive and easy to work with for the mini split installation. The technicians Moises and Oscar were great! Would recommend!
Where we work
Next door to Dumfries: Triangle, Quantico, Woodbridge, Lorton and Stafford.
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
One per room you want on its own setting. Two upstairs bedrooms in a 1950s Tripoli Heights house might share an outdoor unit as two zones, $11,000 to $15,000 installed; a third room makes it $12,500 to $18,000. Count the rooms you might want later before the outdoor unit is picked.
Up off the ground. A mini split’s outdoor unit can hang on wall brackets or stand on a raised base, clear of the puddles a pad would sit in. The Town’s floodplain manager in Public Works can tell you whether your parcel is in FEMA’s special flood hazard area.
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 Dumfries 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.