Furnace Replacement Cost in Stonecrest, Georgia
Furnace replacement in Stonecrest runs about $5,300 for a typical job. Basic installs start near $2,900. High-efficiency equipment with duct or electrical work can reach $7,200.
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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
- A tech found a cracked heat exchanger, or the CO detector has gone off
- Some rooms stay cold, the burner short-cycles, or the ignitor keeps failing
- The furnace is 15 to 20 years old or more
- A repair quote runs past a third of the cost of a new unit
What Moves the Price
- BTU size, which should come from a Manual J load calculation
- Condition of the existing ductwork and any changes it needs
- Single-stage, two-stage or modulating gas valve
- New PVC venting if you move to a condensing model
- AFUE rating: a basic 80% unit vs. a 96% condensing furnace
- Permit and inspection fees, which the local building department sets
We lowered the national figures about 8% 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
- Gas line and vent connections
- The permit and the manufacturer warranty registration
- Removing and hauling away the old furnace
- The new furnace, filter rack and thermostat wiring
- Combustion and safety tests
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
- Ask for the Manual J load calculation in writing. Oversized furnaces are the most common mistake we see.
- Replace it in early fall if you can. A no-heat emergency in January costs more and leaves you fewer choices.
- 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 Stonecrest Homeowners
How much is furnace replacement in Stonecrest?
Plan on $2,900 to $7,200, with most jobs near $5,300. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule furnace replacement in Stonecrest?
In spring or fall. Those are the slow months between heating and cooling season in Stonecrest.
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.
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.
Furnace Replacement Near Stonecrest
- Marietta $3,300 to $8,100
- Brookhaven $4,200 to $10,300
- Albany $2,500 to $6,100
- Smyrna $3,600 to $8,800
- Alpharetta $4,400 to $10,800
- Valdosta $2,500 to $6,100
- Mableton $3,300 to $8,100
- Dunwoody $4,000 to $9,800
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Mcdonough; NOAA Storm Events Database 2020-2025, DeKalb County. Prices are our estimates, not contractor quotes. Updated 2026.