Furnace replacement in Falls Church.
Replacing only the gas furnace in Falls Church costs $4,285 to $14,040 installed, AC left in place. In Pimmit Hills about 9 in 10 owners heat with gas.
- Installed price in writing
- Sized to the house, not the old nameplate
- Dedicated HVAC team
Get your furnace priced in writing
Falls Church burns gas, and its 1950s houses have outlived several furnaces.
Gas heats most of Falls Church. About 7 in 10 owners in the City and in West Falls Church use it, about 8 in 10 in Lake Barcroft, and in Pimmit Hills, mostly single-family houses, the Census puts it at 92 percent. When the heat quits here, the question is rarely which fuel. It’s whether the furnace goes alone or takes the cooling with it.
In houses this old, the furnace alone is often the right call. The median owner-occupied house went up in 1957 in West Falls Church, 1958 in Lake Barcroft and 1961 in Pimmit Hills, before central air was common in houses like these, so the cooling usually came later and has been replaced on its own clock since. A furnace from the early 2000s can sit under a coil and an outdoor unit only a few summers old.
Which permit applies follows the City line, not the mailing address. Inside the City of Falls Church, a gas furnace swapped one for one takes a gas permit, and the City lists a new furnace replacing an equivalent one among the permits its counter can issue without plan review. On the Fairfax County side, a gas furnace needs a permit even like for like, plus a chimney vent certification, and if new gas piping goes in with it, the county makes it a residential plumbing permit instead.
Propane is rare here, about 2 in 100 owners in West Falls Church, but a propane furnace gets the same range, its burner converted for propane before the first fire. Either way, where you land in $4,285 to $14,040 is mostly size and efficiency, and the HVAC replacement cost estimator turns a few answers about your house into your own number.
The furnaces across Falls Church, place by place.
Census figures for the owner-occupied homes in each place, and what that usually means for the furnace that’s there now.
| Place | Median home built | Most homes are | Heated with | The furnace there now |
|---|---|---|---|---|
| West Falls Church | 1957 | single-family houses, about 6 in 10 | gas, about 7 in 10 | Gas furnaces on their second or third round, often on a chimney shared with the water heater. |
| Bailey’s Crossroads | 1980 | condo and apartment buildings, about 6 in 10 | electricity, about 5 in 10 | Condo and apartment buildings: mostly electric heat, few furnaces. |
| Idylwood | 1975 | condo and apartment buildings, about 4 in 10 | gas, about 5 in 10 | Condo and apartment buildings: compact furnaces in closets. |
| City of Falls Church | 1964 | condo and apartment buildings, about 5 in 10 | gas, about 7 in 10 | Condo and apartment buildings: compact furnaces in closets. |
| Lake Barcroft | 1958 | single-family houses, about 6 in 10 | gas, about 8 in 10 | Gas furnaces on their second or third round, often on a chimney shared with the water heater. |
| Seven Corners | 1972 | condo and apartment buildings, about 5 in 10 | gas, about 6 in 10 | Condo and apartment buildings: compact furnaces in closets. |
| Pimmit Hills | 1961 | single-family houses, about 7 in 10 | gas, about 9 in 10 | Gas furnaces on their second or third round, often on a chimney shared with the water heater. |
Falls Church houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
The City of Falls Church
ZIP 22046, plus a few City addresses in 22042 and 22044.
- Median home built1964 Census
- Built before 1980about 6 in 10 Census
- Built since 2000about 3 in 10 Census
- Most homes arecondo and apartment buildings, about 5 in 10 Census
- Heated withgas, about 7 in 10 Census
- Rentedabout 5 in 10 Census
- In condo buildings the association often has a say over the flue and the gas line, so check its rules before a new furnace goes in.
- Houses this age are often on their second or third furnace, still blowing through the original ducts, and the new one has to suit them.
The Fairfax County side
22041 to 22044: West Falls Church, Idylwood, Lake Barcroft, Seven Corners and Bailey’s Crossroads.
- Built before 1980about 7 in 10 Census
- Built since 2000about 1 in 10 Census
- Most homes arecondo and apartment buildings, about 4 in 10 Census
- Heated withgas, about 6 in 10 Census
- Rentedabout 4 in 10 Census
- Most heat here is gas, so the usual job is gas furnace for gas furnace, and the real choice is how efficient the new one should be.
What a new furnace costs in Falls Church.
The same price book our estimator runs on, for a gas furnace on its own, 2 to 5 tons, keeping the air conditioner you have. A single-stage furnace in a small house sits near the bottom; a modulating one in a big house, near the top.
- A gas furnace alone, keeping your air conditioner, installed$4,285 to $14,040
- A furnace and air conditioner together, installed$8,898 to $23,000
- Repair diagnostic visit, if it may be worth fixing$99
The HVAC replacement cost estimator narrows it to your house. Then a tech measures, and you get the installed price in writing, at no charge, before anything is ordered.
Natural gas or propane, in a house, a townhouse or a condo, we replace them all. Oil furnaces we don’t.
When a new furnace makes sense in Falls Church.
The outdoor unit is younger than the furnace
Read both labels. If the condenser outside is only a few years old and the furnace downstairs is pushing twenty, the furnace is the part that’s done. Where cooling arrived after the house was built, the two halves often age apart.
It shares a chimney with the water heater
A high-efficiency furnace vents out the side in plastic pipe, which can leave the water heater alone in a chimney sized for two. Ask about that before you pick a furnace, not on install day.
The heat exchanger is cracked
It’s the wall that keeps the burner’s exhaust out of the air the furnace blows through the house. Nobody patches one; a crack ends the repair conversation.
Who signs off on a new furnace in Falls Church.
City of Falls Church
In the City of Falls Church a one-for-one gas furnace replacement needs only a gas permit. Source.
How to pick the best furnace replacement company in Falls Church.
Questions to ask anybody who quotes you, us included.
Did they ask which side of the City line the house is on?
A Falls Church address can be the City or Fairfax County, and the paperwork changes with it: a City gas permit from City Hall on Park Avenue, or a county permit with a chimney vent certification. A quote that never asks is guessing.
Did they size it to your house?
Ask how they picked the size. Copying the old nameplate repeats whatever was guessed when the house was built.
Did they check the air conditioner you’re keeping?
A new furnace has to work with the coil and the outdoor unit already there. Ask whether they looked at both before quoting a furnace on its own.
Will they tell you if it’s worth fixing?
A good company puts the repair price next to the replacement range and lets you choose. Already holding somebody’s big number? Take the free second opinion first.
What our customers say.
Moises and Oscar did a superlative job doing a custom installation of a new HVAC unit in a tight basement space. And they then took the time to go over system operation. Top tier job and service in all respects!
5.0 stars across 884 Google reviews. Read them on our reviews page.
Furnace replacement questions from Falls Church.
Can I keep my air conditioner when the furnace is replaced?
Usually, if it cools well and the coil fits the new furnace. The coil usually sits on the furnace’s top, so the two have to match in width and airflow. If the outdoor unit still runs on R-22, price the pair instead, $8,898 to $23,000 installed.
Should a Falls Church house go electric instead of getting another gas furnace?
The City of Falls Church makes the case for heat pumps on its own energy pages, and a heat pump cools too. In a gas house with a small electrical panel, though, another gas furnace is the simpler job. The estimator prices both.
How much does a new furnace cost in Falls Church?
$4,285 to $14,040 installed for a gas furnace on its own, keeping the air conditioner you have; size and efficiency set where yours lands. A furnace and air conditioner together run $8,898 to $23,000. The HVAC replacement cost estimator gives your house its own number.
Should I repair it or replace it?
Fix the small parts on almost any furnace. Past fifteen years, with a repair over a third of the price of a new one, replacing usually wins. Not sure which you’re looking at? The diagnostic visit is $99, and the tech prices the repair before starting it.
Furnace replacement in the towns next door.
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- Furnace replacement in McLean
- Furnace replacement in Vienna
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The range first, then your number.
Call, or book online and pick a window. A tech measures the house and puts the installed price in writing before anything is ordered, and if the old furnace is worth fixing, 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 Falls Church 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.