HVAC Replacement Cost in Marietta, GA (2026)
Updated October 2026 · Marietta, GA · index 0.97
How much does a new HVAC system cost in Marietta? For a 3-ton system with central AC + gas furnace, homeowners in Marietta, GA pay about $10,200 on average, and most quotes land between $6,950 and $13,400 — $2,318 to $4,477 per ton. The price covers removing the old system, the new outdoor and indoor equipment, a new line set, electrical and condensate connections, the thermostat, the permit, start-up and commissioning.
The HVAC replacement price in Marietta runs 3% below the U.S. average: construction labor in the Marietta area runs 6% below the national mean, materials 1% above. The same job averages $10,500 nationally and about $9,600 at the Georgia statewide index.
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HVAC replacement price in Marietta by system type
What a 3-ton system costs in Marietta with each system type, installed:
| Option | Average · range |
|---|---|
| Central AC + gas furnacesplit AC, matched coil and an 80,000 BTU furnace$3,398 per ton | $10,200$6,950 – $13,400 |
| Heat pump + air handlerall-electric split heat pump, no furnace$3,152 per ton | $9,450$6,350 – $12,600 |
| Cold-climate heat pump + air handlervariable-speed heat pump rated for deep winter$3,600 per ton | $10,800$7,300 – $14,300 |
The least expensive option in Marietta is heat pump + air handler, at about $9,450; cold-climate heat pump + air handler averages $10,800, 1.1 times as much.
Cost to replace an HVAC system in Marietta by size
With central AC + gas furnace, priced for Marietta, GA:
| Size | Average · range |
|---|---|
| A 2-ton system$4,424 per ton | $8,850$6,050 – $11,700 |
| A 3-ton system$3,398 per ton | $10,200$6,950 – $13,400 |
| A 4-ton system$2,885 per ton | $11,500$7,850 – $15,200 |
Some costs stay the same whatever the size — load calculation and equipment sizing, mechanical permit and inspection, old system removed, refrigerant recovered — so a bigger job costs less per unit: $2,885 per ton for a 4-ton system against $4,424 for a 2-ton system.
What an HVAC replacement in Marietta includes
Line by line, the $10,200 average for a 3-ton system breaks down like this: 32% labor, 65% materials and equipment, and $280 in permit fees passed through at cost.
| Line | Low – high |
|---|---|
| Load calculation and equipment sizing | $70 – $220 |
| Mechanical permit and inspection | $150 – $400 |
| Old system removed, refrigerant recovered | $330 – $590 |
| Gas furnace (about 80,000 BTU) | $1,500 – $2,650 |
| Outdoor unit, set on a new pad | $2,200 – $4,150 |
| Matched indoor coil | $960 – $2,050 |
| New refrigerant line set (25 ft) | $370 – $590 |
| Disconnect, whip and thermostat wire | $200 – $330 |
| Condensate drain and safety switch | $110 – $260 |
| Gas connection and furnace venting | $310 – $580 |
| Plenums and transitions to the ducts | $260 – $590 |
| Programmable or smart thermostat | $220 – $410 |
| Evacuation and refrigerant charge | $110 – $220 |
| Start-up and commissioning | $110 – $260 |
| Warranty registration and walk-through | $60 – $130 |
Each line is the price book's U.S. rate for that step, scaled by 0.76 to the installed price published sources give for the whole job (see how these prices are built), times Marietta's index of 0.97; permit fees are not scaled.
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What affects HVAC replacement prices in Marietta
Labor and materials in Marietta
Construction wages in the Marietta metro run 10% below the U.S. mean (BLS, May 2025), and specialty-contractor pay in the city's county moves that up by 4%, to 6% below the national mean. Materials in the area's ZIP codes price 1% above the national average. Together they give Marietta a construction cost index of 0.97.
Where Marietta sits in Georgia
Marietta ties for the most expensive of the 6 Georgia cities in our index, against a statewide index of 0.91. Columbus is the least expensive at 0.85.
Against the rest of the country
Of the 306 U.S. cities in JobFlex's index, Marietta ranks 188th from the most expensive. The job that averages $10,200 here averages $10,500 at the national rate.
Climate a system is sized for in Georgia
Contractors size equipment for the local design temperatures. Across Georgia's counties the median is about 95°F on a hot summer day and 25°F on a cold winter night (ENERGY STAR county table), and your county can differ. A standard heat pump handles most winters here; a furnace or a cold-climate model covers the coldest nights.
Sales tax in Georgia
Georgia's base state sales tax is 4%, and cities and counties can add their own. How it applies to a home-improvement contract varies, so ask whether a quote includes it. Prices on this page are before tax.
What a Marietta contractor will ask before quoting
- Job type — new construction, replacement or upgrade — and the evidence for it
- Heating and cooling load for this house (not the old nameplate), tonnage, fuel and refrigerant
- Ducts, line set, circuit, gas line and flue: keep, fix or replace, each with its reason
- Water heater in scope, and whether it shared the old flue
- Panel main amps, free slots and the new equipment's MCA
- Permits, tests and incentives that apply in this state
HVAC replacement cost in other Georgia cities
A 3-ton system with central AC + gas furnace averages $10,200 in Marietta; $10,200 in Atlanta, $9,900 in Lawrenceville, $9,600 in Savannah.
| City | Average · range |
|---|---|
| Atlanta, GAsame as Marietta | $10,200$6,950 – $13,400 |
| Lawrenceville, GA3% less | $9,900$6,750 – $13,000 |
| Savannah, GA6% less | $9,600$6,550 – $12,600 |
| Augusta, GA7% less | $9,500$6,450 – $12,500 |
| Columbus, GA12% less | $8,950$6,100 – $11,800 |
HVAC replacement price in Marietta: questions
How much does a new HVAC system cost in Marietta, GA?
About $10,200 for a 3-ton system with central AC + gas furnace, and most Marietta quotes fall between $6,950 and $13,400. That is 3% below the U.S. average, where the same job averages $10,500.
What is the HVAC price per ton in Marietta?
$2,318 to $4,477 per ton, about $3,398 on average with central AC + gas furnace. Smaller jobs cost more per unit, because the fixed costs are spread over less.
How much is a 4-ton system in Marietta?
$7,850 to $15,200, about $11,500 on average, with central AC + gas furnace — $2,885 per ton.
Do you need a permit for HVAC replacement in Marietta?
Yes — installing HVAC or fuel-burning equipment needs a permit nearly everywhere, Marietta included. The prices on this page carry $150–$400 for the permit and inspection.
Does the price include sales tax in Georgia?
No. The prices here are before tax; Georgia's base state rate is 4%, plus any local rate.
What size HVAC system does a house in Marietta need?
It is worked out with a Manual J load calculation for the house — included in the prices above — not from square footage alone. Here it is run against design temperatures of about 95°F in summer and 25°F in winter (the Georgia median).
Other home projects in Marietta
HVAC replacement cost in Georgia
How these prices are built
Every price on this page comes from JobFlex's contractor price book: what a homeowner pays a licensed contractor for each step of the job, as a U.S. national average per unit, with the contractor's overhead and profit included and sales tax left out. The HVAC replacement is priced step by step, then multiplied by Marietta's construction cost index of 0.97.
Where the price book's steps for an option add up to more than 20% over the installed price a published source gives for the whole job, every step but a permit fee is scaled down to the middle of that range: central AC + gas furnace × 0.76 (HomeCostCalcs 2026: $7,000–$14,000); heat pump + air handler × 0.76, following central AC + gas furnace; cold-climate heat pump + air handler × 0.76, following central AC + gas furnace.
The index weighs local construction wages (BLS Occupational Employment and Wage Statistics, May 2025) at 60% and the area's material prices (Craftsman ZIP-area factors) at 40%. Published indices for Marietta, each on its own base: Craftsman 1.07. Treat any city figure as about ±5%; a contractor's quote for your house is the number to plan with.
Contractors in Marietta build quotes like these with JobFlex's HVAC estimator.
- HomeCostCalcs 2026: furnace + AC replacement $7,000-$14,000 standard, $10,000-$20,000 high efficiency
- Today's Homeowner 2025: complete HVAC system install $5,000-$12,500