Most Ashburn houses were built in a twenty year rush, and that’s the whole story behind what people here pay us for. The furnaces, AC units and water heaters that went in with those houses are reaching the end of their run at the same time, street by street. Here’s what the work costs, from our own price book, for Ashburn, Brambleton, Broadlands, One Loudoun and the rest of the 20147 and 20148 ZIPs.
Why Ashburn prices look the way they do
Of Ashburn’s 31,473 owner-occupied homes, 70% went up in 2000 or later, and the median one was built in 1998 (Census ACS 2020-2024). 82% heat with gas, so the usual Ashburn pairing is a gas furnace with a central AC on top, and a gas tank water heater beside it. Townhouses are 38% of homes, nearly as many as single-family houses (39%), which is why so many of our Ashburn installs happen in a tight utility closet or an attic, not a roomy basement.
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. A full furnace and AC replacement runs $8,898 to $23,000. From about $148 a month at 0% APR for 60 months, the whole price financed, on approved credit.
Heating and cooling prices in Ashburn
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| Job | Price | Monthly, on approved credit |
|---|---|---|
| Furnace and AC replaced together | $8,898 to $23,000 | From $148/mo at 0% APR for 60 months |
| Gas furnace replaced on its own | $4,285 to $14,040 | From $71/mo at 0% APR for 60 months |
| AC replaced on its own | $5,942 to $14,450 | From $99/mo at 0% APR for 60 months |
| Heat pump replaced | $8,499 to $21,650 | From $142/mo at 0% APR for 60 months |
| Ductless mini split, one zone | $7,000 to $10,000 | From $117/mo at 0% APR for 60 months |
| AC or furnace diagnostic visit | $99 | |
| AC capacitor replaced | $240 to $370 | |
| Furnace igniter or flame sensor | $240 to $410 | |
| Furnace tune-up | $99 |
Monthly figures: the whole starting price financed at 0% APR for 60 months, on approved credit. Longer plans lower the payment and cost more in total. The lender sets the final terms.
Free Furnace With a New AC
Put in a new AC with its matching coil and a basic single-stage gas furnace goes in with it, installed together. See the free furnace
Want your own number before anyone comes out? The HVAC estimator prices your house in a few questions.
Water heater and plumbing prices in Ashburn
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| Job | Price | Monthly, on approved credit |
|---|---|---|
| Gas tank water heater replaced | $3,238 to $5,485 | From $54/mo at 0% APR for 60 months |
| Electric tank water heater replaced | $2,778 to $5,493 | From $46/mo at 0% APR for 60 months |
| Tankless water heater installed | $8,886 to $10,486 | From $148/mo at 0% APR for 60 months |
| Water heater flush | $99 | |
| Drain cleaning, one fixture | $200 to $800 | |
| Main sewer line cleaning | $550 to $1,650 | |
| Sump pump replaced | $697 | |
| Pressure reducing valve replaced | $500 to $1,000 |
Monthly figures: the whole starting price financed at 0% APR for 60 months, on approved credit. Longer plans lower the payment and cost more in total. The lender sets the final terms.
A gas tank in Ashburn runs $3,238 to $5,485, and the $500 off is already in that number. From about $54 a month at 0% APR for 60 months, the whole price financed, on approved credit.
Three things that change an Ashburn price
Your HOA’s rules on the outdoor unit
Ashburn Village’s architectural guidelines ask for approval when a bigger high-efficiency outdoor unit goes in a new spot. Brambleton’s rules say a unit replaced in the same location needs no application, and a direct-vent flue on a front elevation is generally not approved. Same spot, same size keeps the job simple; we check the guidelines before we quote a move.
Chloramine in Loudoun Water
Loudoun Water treats with chloramine, which wears out rubber gaskets and toilet flappers faster than plain chlorine. If a toilet keeps running in a 2008 townhouse, a flapper is usually the fix, not a new toilet. Toilet repair runs $250 to $900. White bits in the faucet aerators are usually calcium or a broken dip tube in the water heater, not your pipes.
Brambleton, Broadlands and One Loudoun are on different clocks
Broadlands’ median home dates to 2004 and heats with gas about nine times in ten, so it’s squarely in furnace, AC and water heater territory now. Brambleton’s median is 2011 and Moorefield and One Loudoun date to 2015, with more electric heat pumps in Moorefield. Those newer homes mostly need tune-ups, flushes and the odd capacitor for a few more years.
The best deal running right now, by job
- HVAC replacement: Free furnace with a new AC and its matching coil, up to $4,900 value.
- Water heater replacement: $500 off any size, replaced by our own plumbers. Better than the $200 off coupon.
- Backflow test: $250 for the yearly test your water utility asks for, normally $300, and we send the results in for you. Pay online.
- Membership: $199 a year for dryer vent cleaning, a water heater flush, heating and cooling maintenance, and 15% off any service.
- Dryer vent cleaning: $199 with a year of Comfort+ membership included, normally $298.
- Air duct cleaning: $598 for a Whole Home Air Duct Cleaning, regularly $798. Better than the $50 off coupon.
Every current deal and its fine print is on our offers page.
Questions people ask
How much does a new furnace and AC cost in Ashburn?
A matched furnace and AC replacement in Ashburn runs $8,898 to $23,000 from our price book, depending on size, efficiency and how the closet or attic is laid out. From about $148 a month at 0% APR for 60 months, the whole price financed, on approved credit.
What does a water heater replacement cost in Ashburn?
A gas tank runs $3,238 to $5,485 and an electric tank $2,778 to $5,493, installed, with the $500 off already in the price. From about $46 a month at 0% APR for 60 months, the whole price financed, on approved credit.
Do I need my HOA’s approval to replace my AC in Ashburn?
Usually not for a like-for-like swap in the same spot. Brambleton says a same-location replacement needs no application, and Ashburn Village asks for approval when a bigger unit moves. We check your community’s rules before we quote.
Get your Ashburn price
Call (703) 997-9757 or book online and a SwiftPro technician comes out, looks at the actual equipment and writes the price before any work starts. Homeowners rate us 5.0 stars across 1,138 reviews on Google, Angi, Yelp, the BBB and Facebook. More about our work in Ashburn is on the Ashburn page.
