Furnace Replacement Cost in Brookhaven, Georgia
Furnace replacement in Brookhaven runs about $7,600 for a typical job. Basic installs start near $4,200. High-efficiency equipment with duct or electrical work can reach $10,300.
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Brookhaven Weather and HVAC Load
In a normal year, Brookhaven racks up 2,980 heating and 1,728 cooling degree days (NOAA 1991-2020 normals). Neither season dominates in Brookhaven. That balance is a big reason heat pumps and dual-fuel systems sell well in Georgia. A normal year brings 49 nights at or below freezing and 53 days over 90°F. Snowfall averages about 1 inches. For a 2,000 sq ft house, this climate points to a heating load somewhere near 45,000 BTU/h. Treat that as a starting number. A Manual J calculation will move it up or down based on insulation and windows.
| Heating degree days / year | 2,980 |
|---|---|
| Cooling degree days / year | 1,728 |
| Nights at or below 32°F | 49 |
| Days above 90°F | 53 |
| Average low / high | 51.1°F / 71.8°F |
Brookhaven Housing Stock
The median Brookhaven home dates to 1992, according to the Census ACS. That makes the typical house about 34 years old. Plenty of houses from this period still run original 1990s or early-2000s equipment, which is past its expected service life. Brookhaven has roughly 13,000 owner-occupied homes, or 53.4% of households. The median home value is $660,300, and median household income is $117,448. We use both figures to adjust labor and pricing for this page.
DeKalb County had 1 hail day and 28 days with damaging thunderstorm winds from 2020 through 2025, according to NOAA storm records. The largest hail reported was 1.75 inches across. Storms here are more likely to cause power surges than coil damage, so a surge protector on the outdoor unit is worth the small cost. DeKalb County also had 3 tornado days in that period.
When Replacement Makes Sense
- A tech found a cracked heat exchanger, or the CO detector has gone off
- Gas or electric bills keep climbing even though usage hasn't changed
- A repair quote runs past a third of the cost of a new unit
- Some rooms stay cold, the burner short-cycles, or the ignitor keeps failing
What Moves the Price
- BTU size, which should come from a Manual J load calculation
- AFUE rating: a basic 80% unit vs. a 96% condensing furnace
- New PVC venting if you move to a condensing model
- Single-stage, two-stage or modulating gas valve
- Permit and inspection fees, which the local building department sets
- Condition of the existing ductwork and any changes it needs
For Brookhaven we raised the national figures about 32%, based on local income, home values and climate-based equipment sizing. Get at least three written quotes; real bids can land outside this range.
What the Quote Should Cover
- Combustion and safety tests
- The permit and the manufacturer warranty registration
- The new furnace, filter rack and thermostat wiring
- Gas line and vent connections
- Removing and hauling away the old furnace
Georgia Permits, Efficiency Rules and Rebates
Georgia is in the DOE's Southeast region, where new split central air conditioners need at least 14.3 SEER2 (13.8 SEER2 for systems of 45,000 BTU/h and up). Expect the contractor to pull a mechanical permit for a replacement job in Brookhaven. If a bidder suggests skipping it, move on. Also ask for a Georgia license or registration number and proof of insurance. The federal 25C tax credit ended for equipment installed after December 31, 2025, so incentives now come mostly from utilities and state programs. Check your electric and gas utility's rebate page before you pick equipment.
Before You Hire
- Look up utility rebates on 95%+ AFUE units before you buy.
- Ask for the Manual J load calculation in writing. Oversized furnaces are the most common mistake we see.
- Make sure all three quotes are for the same AFUE and staging, or you can't compare them.
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Furnace Replacement Questions from Brookhaven Homeowners
How much is furnace replacement in Brookhaven?
Plan on $4,200 to $10,300, with most jobs near $7,600. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule furnace replacement in Brookhaven?
In spring or fall. Those are the slow months between heating and cooling season in Brookhaven.
Is a high-efficiency furnace worth it?
In cold climates, a 95%+ AFUE furnace usually earns back the price difference in lower gas bills. Where winters are mild, the payback can take a very long time.
How long does a furnace replacement take?
A straight swap is usually done in one day, somewhere between 4 and 10 hours. Moving to a condensing furnace with new PVC venting can add a few more.
Furnace Replacement Near Brookhaven
- Sandy Springs $3,900 to $9,600
- Dunwoody $4,000 to $9,800
- Stonecrest $2,900 to $7,200
- Smyrna $3,600 to $8,800
- Marietta $3,300 to $8,100
- Valdosta $2,500 to $6,100
- Albany $2,500 to $6,100
- Alpharetta $4,400 to $10,800
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Atlanta Peachtree Airport; NOAA Storm Events Database 2020-2025, DeKalb County. Prices are our estimates, not contractor quotes. Updated 2026.