Both rating plates say 2005
Check the labels on the furnace and the outdoor unit. Around the courthouse, matching mid-2000s dates are common, and a pair that age is near the end of its run. Get both priced before the first one quits in a heat wave.
Stafford, Virginia
Furnace and AC replacement in Stafford.
Furnace and AC replacement in Stafford runs $8,898 to $23,000 installed. Around the courthouse, most owner homes date from 2000 on.
$148/mo60mo @ 0% APR
Price range
$8,898-$23,000
8yrs @ 7.99%
$126/mo
15yrs @ 9.99%
$96/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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- Your price range up front
- Sized to the house, not the old label
- Dedicated HVAC team
5.0 stars across 1,132 reviews
One of our technicians with a new Trane outdoor unit he just installed beside a Northern Virginia house.
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
What a new furnace and AC costs in Stafford.
$8,898 to $23,000 installed for a furnace and air conditioner replaced together, 2 to 5 ton, from the same price book as our estimator. Where you land depends on the size of the house, the efficiency you pick, and what the ductwork and venting need.
Furnace and AC together, installed
$8,898 to $23,000
or $148/mo at 0% APR for 60 months
Furnace alone, keeping your AC
$4,285 to $14,040
or $71/mo at 0% APR for 60 months
Heat pump system instead
$8,499 to $21,650
or $142/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
The HVAC replacement estimator gives your house its own number. Then we measure, and the price is in writing before anything is ordered.
Two years of labor come with every install. Monthly plans are on our financing page.
What’s different in Stafford
Stafford’s newer gas houses, where the furnace and the air conditioner age together.
Around the county courthouse the Census place’s typical owner home went up in 2005, and close to eight in ten of its homes date from 2000 or later. A little over half its owners heat with gas, and about a quarter of its homes are townhouses; the County’s plan names Austin Ridge and Embrey Mill, near Mine Road, along that Courthouse Road corridor. In houses of that vintage the furnace and the outdoor unit usually went in the same month, and they tend to give out within a few seasons of each other.
The cooling half works hard here. NOAA’s 1991 to 2020 normals for the Fredericksburg station, about ten miles south-southwest, count 40.7 afternoons a year at 90 or hotter. The Quantico Marine Corps Air Station, eight miles northeast, counts 29.5, but its July nights average about 71, three degrees warmer than Fredericksburg’s, so the condenser keeps running after sundown.
Stafford County’s permit FAQ splits this job down the middle. An air conditioner swapped for a matching one where the old one stood needs no permit; a gas-fired furnace always does, even like for like. So a furnace and AC done together is permit work because of the furnace half, and it goes through the County’s Building Division.
Not every Stafford pair is a furnace and an air conditioner. In Aquia Harbour, where nearly every owner heats with electricity, the indoor half is an air handler, and the swap is a heat pump system at $8,499 to $21,650 installed.
Neighborhood by neighborhood
The systems across Stafford, place by place.
Census figures for the owner-occupied homes in each place, and what that usually means for a replacement.
| Place | Median home built | Most homes are | Heated with | What the system usually is |
|---|---|---|---|---|
| Aquia Harbour | 1984 | single-family houses, nearly all | electricity, nearly all | Mostly electric heat, so usually a heat pump swap instead. |
| Stafford Courthouse | 2005 | single-family houses, about 4 in 10 | gas, about 6 in 10 | Many still on the builder’s furnace and air conditioner. |
By the numbers
Stafford houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
Stafford
ZIPs 22554 and 22556 as a whole: every Stafford address. The Census places in the table hold about one in seven of these homes.
- Built before 1980about 2 in 10 Census
- Built since 2000about 4 in 10 Census
- Most homes aresingle-family houses, about 7 in 10 Census
- Heated withelectricity, about 6 in 10 Census
- Rentedabout 2 in 10 Census
- Electric heat here usually means a heat pump with backup strips, which is priced as a heat pump system, not a furnace and AC.
When it’s time
When replacing both makes sense in Stafford.
Your heat may not be a furnace
Where a lot of homes heat with electricity, the indoor half is often an air handler, and the like-for-like swap is a heat pump system, $8,499 to $21,650 installed.
Both halves went in with the house
Plenty of houses built since 2000 still run the builder’s furnace and AC. They wear out on about the same schedule, so when one goes, price the pair.
Permits and sign-offs
Who signs off on a new system in Stafford.
Stafford County
Virginia’s building code lets a home’s mechanical appliance be replaced without a permit only when it isn’t fueled by gas or oil, so in Stafford County a gas or propane furnace swap is permit work. Source.
Our Virginia Class A contractor license, 2705192276, is on the side of the van.
Choosing who installs it
How to pick who replaces your furnace and AC in Stafford.
Ask every company that quotes the job, us included.
Did they price a heat pump beside the furnace?
In 22554 a bit more than half the owners heat with electricity and close to four in ten with gas, so plenty of Stafford houses could go either way. If yours burns gas, ask for the furnace and AC price next to a heat pump paired with the furnace.
Do they size it to the house, or copy the old label?
The old size is a guess somebody made years ago. Ask whether they measure the house and check the ductwork first. Too big short cycles; too small runs all afternoon in August.
Is the whole job in the written price?
Furnace, outdoor unit, matching coil, refrigerant lines, thermostat, permit and hauling the old one away. If it isn’t on the paper, ask.
Already holding another company’s quote?
Our free second opinion looks at the system you were quoted on and tells you what it actually needs, with our price if you want it.
Two of our crew going over a work order before the day's calls.
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.
From our Google reviews
What our customers say.
5.0 stars across 1,132 reviews. Read them on our reviews page.
Oscar and Ndung were great technicians for our HVAC install! Very knowledgeable and friendly. Would recommend them to others!
Where we work
Furnace and AC replacement in every Northern Virginia town we serve
Next door to Stafford: Fredericksburg, Quantico, Triangle, Dumfries and Midland.
Fairfax County
Arlington County
Loudoun County
Prince William County
Fauquier County
Stafford County
Questions
Furnace and AC replacement questions from Stafford.
Is it worth replacing a 2000s furnace and AC in Stafford before they fail?
Often, yes. 22554 alone has 3,592 owner homes from that decade, and a pair that came with one of them is close to twenty. Replaced on your schedule, the job gets measured and sized; replaced after an August breakdown, it gets decided fast. The HVAC replacement estimator gives your range, and a repair diagnostic is $99.
What should I check on the outdoor unit after a Stafford storm?
Look before you switch the cooling back on. NOAA’s storm records note numerous trees down across Stafford on July 9, 2025, and more than 50 between Stafford and Falmouth in August 2018. A limb on the unit, fins pressed flat or a unit that stood in water all deserve a look first. Call us after a storm and we’ll check the whole system before it runs. Often same-day, and we will tell you honestly when we can get there.
How much does a new furnace and AC cost in Stafford?
$8,898 to $23,000 installed for the pair, by size and efficiency. A furnace alone, keeping your AC, is $4,285 to $14,040. The HVAC replacement estimator gives your house its own number.
Do I have to replace both at the same time?
No. If the AC is young and only the furnace failed, replace the furnace. If they’re the same age, do both: a new outdoor unit needs a matched coil, and one built for the old refrigerant isn’t rated for the new one.
Ready when you are
Start with your number, then a written quote.
Call, send the form at the top, or take the HVAC replacement estimator first. We measure before we quote, and if a repair makes more sense than a new system, you’ll hear that first.
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 Stafford 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.