HVAC System Replacement Cost in Stonecrest, Georgia
Our 2026 estimate for full HVAC system replacement in Stonecrest, GA is $8,100 to $17,600. That puts Stonecrest 5% below the national average, mainly because of lower local labor costs.
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Stonecrest Weather and HVAC Load
NOAA's 1991-2020 climate normals put Stonecrest at 2,908 heating degree days and 1,843 cooling degree days per year. Neither season dominates in Stonecrest. That balance is a big reason heat pumps and dual-fuel systems sell well in Georgia. Count on roughly 68 nights below 32°F and 74 afternoons past 90°F in a typical year. 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 | 2,908 |
|---|---|
| Cooling degree days / year | 1,843 |
| Nights at or below 32°F | 68 |
| Days above 90°F | 74 |
| Average low / high | 49.7°F / 74.3°F |
Stonecrest Housing Stock
Half the homes in Stonecrest were built before 1999 (Census ACS median), so the typical house is about 27 years old. Plenty of houses from this period still run original 1990s or early-2000s equipment, which is past its expected service life. Owners live in 53.2% of occupied homes, roughly 11,000 households. The median home value is $223,100, and median household income is $62,939. We use both figures to adjust labor and pricing for this page.
Between 2020 and 2025, NOAA's Storm Events Database logged 1 hail day and 28 days with damaging thunderstorm winds in DeKalb County. 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
- An old R-22 AC paired with an aging furnace
- Both the heating and cooling equipment are 15 years old or more
- Some rooms are uncomfortable, and the energy bills are high
What Moves the Price
- Efficiency ratings: SEER2, AFUE and HSPF2
- Permits and electrical work
- Equipment sized to the house and climate
- Duct repair or replacement
- Furnace plus AC, or heat pump plus air handler
- Thermostat and zoning upgrades
We lowered the national figures about 5% for Stonecrest using local income, home values and the equipment size this climate needs. Real bids can still come in outside the range, so collect three written quotes.
What the Quote Should Cover
- New, matched heating and cooling equipment
- Startup, testing and warranty registration
- A load calculation and system design
- Removing the old equipment
- Duct connections and sealing
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 Stonecrest. 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
- Replacing both pieces at once usually costs less than two separate jobs a few years apart.
- Make every bidder quote the same efficiency ratings, or the prices won't compare.
- 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 Stonecrest Homeowners
How much is full HVAC system replacement in Stonecrest?
Plan on $8,100 to $17,600, with most jobs near $13,300. 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 Stonecrest?
In spring or fall. Those are the slow months between heating and cooling season in Stonecrest.
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.
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.
HVAC System Replacement Near Stonecrest
- Marietta $8,800 to $19,200
- Brookhaven $11,500 to $25,000
- Albany $8,000 to $17,400
- Smyrna $9,600 to $20,900
- Alpharetta $12,000 to $26,100
- Valdosta $7,800 to $17,000
- Mableton $8,800 to $19,200
- Dunwoody $10,900 to $23,700
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Mcdonough; NOAA Storm Events Database 2020-2025, DeKalb County. Prices are our estimates, not contractor quotes. Updated 2026.