HVAC System Replacement Cost in Brookhaven, Georgia
Expect to pay $11,500 to $25,000 for full HVAC system replacement in Brookhaven, GA. Most homeowners end up near $18,900, depending on the equipment tier and how much of the old setup can be reused.
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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
- Some rooms are uncomfortable, and the energy bills are high
- An old R-22 AC paired with an aging furnace
- Both units keep needing repairs
What Moves the Price
- Efficiency ratings: SEER2, AFUE and HSPF2
- Furnace plus AC, or heat pump plus air handler
- Duct repair or replacement
- Equipment sized to the house and climate
- Thermostat and zoning upgrades
- Permits and electrical work
For Brookhaven we raised the national figures about 35%, 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
- Duct connections and sealing
- Startup, testing and warranty registration
- Removing the old equipment
- New, matched heating and cooling equipment
- A load calculation and system design
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
- Get one quote for a heat pump system and one for a furnace plus AC.
- Replacing both pieces at once usually costs less than two separate jobs a few years apart.
- Ask for a duct leakage test. Leaky ducts can lose 20 to 30% of what the system puts out.
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HVAC System Replacement Questions from Brookhaven Homeowners
How much is full HVAC system replacement in Brookhaven?
Plan on $11,500 to $25,000, with most jobs near $18,900. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule full HVAC system replacement in Brookhaven?
In spring or fall. Those are the slow months between heating and cooling season in Brookhaven.
Can I replace only the AC and keep my furnace?
Yes, as long as the indoor coil and blower work with the new AC. A mismatched system loses efficiency and can void the warranty.
How often should an HVAC system be replaced?
Most systems get replaced every 15 to 20 years. AC units and heat pumps usually wear out before gas furnaces do.
HVAC System Replacement Near Brookhaven
- Sandy Springs $10,700 to $23,300
- Dunwoody $10,900 to $23,700
- Stonecrest $8,100 to $17,600
- Smyrna $9,600 to $20,900
- Marietta $8,800 to $19,200
- Valdosta $7,800 to $17,000
- Albany $8,000 to $17,400
- Alpharetta $12,000 to $26,100
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.