Heating, cooling and plumbing in Middleburg, from Washington Street out to the hunt country.
A repair diagnostic visit in Middleburg is $99. Town water from five wells, a historic district that reviews what the street sees. What we find, who signs off.
- Prices in writing, first
- Dedicated HVAC and plumbing teams
- Virginia license #2705192276
Get your price in writing
Federal brick and stone on Powell’s grid, hunt country houses from the 1930s, farms all around.
Nearly one home in four across ZIP 20117 went up before 1940, by the Census count, though the median owner home dates to 1986. Which kind you own decides most of what we find.
The Town grid dates to 1787, when Leven Powell cut fifty acres into seventy lots halfway between Alexandria and Winchester and told every lot owner to build a house at least 16 feet square with a brick or stone chimney. Most of the district’s historic buildings still have their chimneys, and the Town’s design guidelines want them kept whether or not anything vents up them now. Some still carry a furnace’s exhaust. A high-efficiency furnace or water heater can’t use one at all: it vents through plastic pipe out a wall or the roof, and in the Historic District the street gets a say in where that pipe comes out.
The hunt country houses came with the horses. The Middleburg Hunt organized in 1906, and the Town’s 2016 survey of the Historic District dates close to two in five of its buildings to 1900 through 1939, with about one in five older than 1840. Town water and a town sewer were both running by 1937, so the pipe between an old house and the main can be very old, and all of it belongs to the owner.
Across 20117, the Town and the farms together, about eight in ten homes are detached houses and the heat is mostly electric: about six in ten owners heat with electricity, two in ten with propane and about one in nine with oil. Natural gas heats fewer than one in twenty. About a tenth of the ZIP’s land is across the line in Fauquier County.
Heat pumps, propane, and plumbing that’s yours right out to the Town main.
Heating and cooling go to our HVAC technicians, pipes and water heaters to our plumbers, and both teams run out of the Chantilly shop.
Heating
A cold house in Middleburg usually means a heat pump stuck on its backup strips or a propane furnace that won’t light. If the house still burns oil, we don’t repair the burner, but we’ll price the move to a heat pump or a propane furnace.
Cooling
The Town’s guidelines discourage window units and through-the-wall units on historic facades, and rooftop equipment on front roofs, so cooling an old house in town usually means ducts run through the attic or a ductless mini-split, with the outdoor unit set where the street can’t see it.
Plumbing
The Town owns its mains and meters and nothing else. The water pipe from the main to your house, the stretch under the street included, and the sewer line out to the main are the owner’s, so a break under the sidewalk is a plumber’s job, not Town Hall’s. Those lines, leaks, drains and water heaters are what our plumbers do.
Historic house or farmhouse, Middleburg gets the same price book.
The number doesn’t change for an old house or a long lane, and you have it in writing before the work starts.
- AC run capacitor replaced$240 to $370
- Refrigerant topped up$190 to $740
- Condensate drain cleared$175 to $420
- Repair diagnostic visit$99
- Drain cleaning, one fixture$200 to $800
- Main sewer line cleaning$550 to $1,650
- Leak detection$200 to $500
- Pressure reducing valve replacement$500 to $1,000
- Water heater, tank, installed$2,757 to $7,494
The figures come from the price book behind our plumbing page and our AC repair page. The water heater estimator prices a new tank, electric or propane, with the Loudoun County permit counted.
Replacing an old system, or moving off oil? The HVAC estimator gives the installed range for a house your size before anybody comes out.
The Town for water, sewer and the Historic District, Loudoun County for the permit.
Your water
Inside the town limits the Town of Middleburg is your water company. It pumps five wells in and near town into two water towers, chlorinates all of it, adds a phosphate to prevent oxidation in the mains, and softens and greensand filters three of the wells to bring iron and manganese down. Its 2025 water quality report prints no hardness figure. In July 2026, with the wells’ levels falling through a drought, the Town Council made water conservation mandatory.
Reports: Town of Middleburg, no hardness figure published.
Your permit office
Loudoun County issues the building permits, in Middleburg as everywhere else in the county, but inside the town limits a job that needs one also needs a Town Zoning Location Permit. Swapping a gas or propane water heater or furnace takes a County permit even like for like; since October 2025 one that keeps its BTUs and its spot needs no plans. In the Historic District, a new outdoor unit, exhaust fan or vent pipe the street can see needs a Certificate of Appropriateness before the work starts.
Permit pages: Loudoun County.
Your sewer, or your septic
In town, the drains run to the Town’s wastewater treatment plant at the east end, helped by a pumping station on the west end. The sewer lateral from the property line to the main is the owner’s to keep up, though the Town will take over some laterals that meet its criteria, on application. Out past the limits the Town’s lines stop, and a house usually has its own well and septic system, which the county health department permits; Loudoun’s posts its scanned records online.
Sources: the Town’s water and sewer page and the Town’s Historic District Design Guidelines and Loudoun’s well and septic page.
What Northern Virginia homeowners say about us.
5.0 stars across 884 Google reviews. Read them on our reviews page.
Voted a Nextdoor Neighborhood Faves winner two years running: 2026 in 30 Northern Virginia neighborhoods, 2025 in Emerald Chase (Herndon) and Hunters Run (Chantilly).
Listed in both the HVAC and Plumbing categories of Northern Virginia Magazine’s Best Home Experts directory, which is exactly how we’re built: a dedicated HVAC team and a dedicated plumbing team.
Our vans in Middleburg lately
In the last 30 days SwiftPro’s vans did replacement quotes and air duct and dryer vent cleaning in Middleburg, most recently on Tuesday, September 29.
Middleburg is 13 miles from SwiftPro’s Ashburn shop, and the van that comes to you is coming from the last job, not from the shop. SwiftPro charges no distance fees anywhere it serves.
Inside the town limits, and the rest of 20117.
In town: Washington Street, which is Route 50, and the grid off it: Federal, Marshall, Jay, Madison, Pendleton, Liberty, Hamilton, Pickering and Reed Streets, Stonewall Avenue, The Plains Road, and the northeast quarter still called Bureau Corner. Out from it: the farms and estates across the rest of 20117, nearly all of it Loudoun County, with a slice to the south in Fauquier. Next door:
Middleburg questions.
Do I need the Town’s approval for a new heat pump in Middleburg?
If the house is in the Historic District and the street can see the outdoor unit, yes: a Certificate of Appropriateness from the Historic District Review Committee. Its guidelines want the unit in the least conspicuous spot and screened in something that suits the house. The committee meets the first Thursday of the month and wants the application fourteen days before, so start before the old unit quits. An exact in-kind replacement is exempt, but any change in form, material or color isn’t, and the Town’s Planning and Zoning staff will tell you which side of that line yours falls on.
Who pays to fix a leak between the water main and my meter?
You do. The Town’s regulations make it responsible for its mains and meters only, so the line from the main to your house is yours, including any part under the street. Fix the leak, get proof of the repair to the Town Treasurer within ten days of finding the high bill, and the Town adjusts the bill, once in any three years. Leak detection is on the price list above.
I have a water softener on Town water. Does Middleburg need anything from me?
One thing, one time. The Town counts a softener or a whole-house filter as a possible cross-connection, but a house with only that needs just a check valve on the line feeding it, shown to the Town once. Lawn irrigation, a pool, a yard hydrant or a booster pump is a different story: those need a testable backflow preventer, inspected every year by May 1.
Can my furnace still vent up the old chimney?
Sometimes. The Town’s guidelines note that some chimneys in the district still carry furnace exhaust, and they want every chimney kept either way. Whether yours works depends on the flue: one built for wood fires can be far too big for a water heater left venting alone after the furnace moves out, and a high-efficiency furnace or water heater can’t use it at all, because it vents through plastic pipe. In the Historic District, run that pipe out a side or back wall the street can’t see, or plan on a Certificate of Appropriateness.
What does an AC repair cost in Middleburg?
A run capacitor is $240 to $370, a refrigerant top-up $190 to $740, and a blocked condensate drain cleared $175 to $420, from the book SwiftPro uses all over Northern Virginia, on Washington Street or out on a farm. With about six in ten 20117 owners heating with electricity, that outdoor unit is usually a heat pump, so a summer repair carries the house through the winter too.
In town or out on the farms, call us.
Tell us the street or the road, whether the water comes from the Town or a well, and what heats the house. We’ll tell you what’s typical for a Middleburg house like yours, roughly what it costs, and when we can be there.
SwiftPro Heating, Cooling & Plumbing is a licensed, BBB Accredited (A rating), independently owned heating, cooling and plumbing company serving Northern Virginia, including Middleburg, Aldie, Purcellville and Leesburg. SwiftPro holds Virginia contractor license #2705192276, is a Trane Comfort Specialist, Rheem Pro Partner and Mitsubishi Diamond Contractor, holds 5.0 stars across 884 Google reviews, was voted a Nextdoor Neighborhood Faves winner two years running, for 2026 in 30 Northern Virginia neighborhoods and for 2025 in Emerald Chase (Herndon) and Hunters Run (Chantilly), and is listed in both the HVAC and Plumbing categories of Northern Virginia Magazine’s Best Home Experts directory. SwiftPro maintains a dedicated HVAC team and a dedicated plumbing team. More at goswiftpro.com.
In Middleburg, SwiftPro repairs and replaces heat pumps, propane furnaces, air conditioners and ductless mini-splits, cleans air ducts and dryer vents, and handles plumbing from drains and leaks to water heaters and the water and sewer lines out to the Town main, inside the Town of Middleburg and across the rest of 20117.
SwiftPro Heating, Cooling & Plumbing, 4230 Lafayette Center Dr, Suite N, Chantilly, VA 20151, (703) 997-9757. Every town we serve is on the town-by-town guide.