Chantilly is really two places with one name. About half the Chantilly addresses we work at are on the Loudoun side, where the mail still says Chantilly, and most of that is South Riding. The Fairfax side, 20151, is older houses around Greenbriar and Brookfield. The two sides need different things, so here’s the price list for each, from our price book.
Why Chantilly prices look the way they do
Across Chantilly’s 6,127 owner-occupied homes, 61% are detached houses and 60% went up between 1980 and 1999; the median dates to 1987 (Census ACS 2020-2024). Heat is 53% gas and 44% electric. Greenbriar dates to around 1970, so 20151 has a lot of heat pumps on their third round. South Riding’s systems mostly date from 2006 on, about eight in ten heat with gas, and many townhouses there have the furnace in the attic.
Water heaters come up more often in Chantilly than in most towns we serve. A gas tank runs $3,238 to $5,485 installed, with the $500 off already in it. From about $54 a month at 0% APR for 60 months, the whole price financed, on approved credit. A tankless runs $8,886 to $10,486. From about $148 a month at 0% APR for 60 months, the whole price financed, on approved credit.
Heating and cooling prices in Chantilly
| 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 |
| Heat pump replaced | $8,499 to $21,650 | From $142/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 |
| Furnace igniter or flame sensor | $240 to $410 | |
| Furnace burners and flame sensor cleaned | $95 to $180 | |
| 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 Chantilly
| 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 |
| Tankless water heater installed | $8,886 to $10,486 | From $148/mo at 0% APR for 60 months |
| Water heater flush | $99 | |
| Pressure reducing valve replaced | $500 to $1,000 | |
| Backflow test | $250 | |
| Sump pump replaced | $697 | |
| Main sewer line cleaning | $550 to $1,650 |
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.
Three things that change a Chantilly price
South Riding’s attic furnaces
An attic furnace in a South Riding townhouse takes more hands and more time to swap than one in a basement, and the condensate line runs over a ceiling. That’s why we look before we quote. A furnace on its own runs $4,285 to $14,040. From about $71 a month at 0% APR for 60 months, the whole price financed, on approved credit.
Columbia Gas or Washington Gas
Parts of Chantilly are on Columbia Gas instead of Washington Gas. It doesn’t change our price, but it changes who you call about the meter, and which utility’s rebates apply.
Fairfax or Loudoun permits
20151 permits go through Fairfax County, which wants one even for a straight swap. South Riding’s go through Loudoun County. We pull either one as part of the job.
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 cost in South Riding?
A gas furnace on its own runs $4,285 to $14,040 from our price book, and a furnace and AC together $8,898 to $23,000. From about $71 a month at 0% APR for 60 months, the whole price financed, on approved credit. Attic installs take a bit more time, which the quote shows.
What does a water heater cost in Chantilly?
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 it. From about $46 a month at 0% APR for 60 months, the whole price financed, on approved credit.
Is South Riding part of Chantilly?
It shares the Chantilly mailing address, but South Riding is in Loudoun County, so permits and water go through Loudoun. We cover both sides.
Get your Chantilly 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 1,136 reviews on Google, Angi, Yelp, the BBB and Facebook. More about our work in Chantilly is on the Chantilly page.
