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.
- Your price range up front
- Sized to the house, not the old label
- Dedicated HVAC team
Get your new system priced
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.
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. |
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.
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
- Furnace alone, keeping your AC$4,285 to $14,040
- Heat pump system instead$8,499 to $21,650
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.
When replacing both makes sense in Stafford.
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.
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.
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.
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.
What our customers say.
Oscar and Ndung were great technicians for our HVAC install! Very knowledgeable and friendly. Would recommend them to others!
5.0 stars across 884 Google reviews. Read them on our reviews page.
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.
Furnace and AC replacement in the towns next door.
Start with your number, then a written quote.
Call, book online, 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 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 884 Google reviews. SwiftPro maintains a dedicated HVAC team and a dedicated plumbing team.
SwiftPro Heating, Cooling & Plumbing, 4230 Lafayette Center Dr, Suite N, Chantilly, VA 20151, (703) 997-9757. Book online, read our reviews, or see every town we serve.