HVAC companies in Marietta, GA

What HVAC work costs in Marietta

Ranges are general estimates gathered from homeowner-reported quotes in the Marietta area, not an offer or a quote for your project.

When to schedule HVAC work in Marietta

Marietta sits in the humid subtropical Atlanta metro, with long, hot, sticky summers that keep AC systems running nearly nonstop from May through September. Winters are generally mild, with only occasional hard freezes, so many homes rely on heat pumps for both heating and cooling rather than a separate furnace. Because most homes have attic-installed air handlers and ductwork, heat gain and duct leakage in the attic are common culprits behind high summer bills and uneven cooling.

Permits and HOA rules

If your home is within Marietta's city limits, mechanical permits for HVAC installation or replacement go through the City of Marietta's Building Inspections Division / Permits office, which now processes applications online via SagesGov 1. If your property is in unincorporated Cobb County, the permit is instead pulled through Cobb County's Community Development Agency, Development and Inspections Division, under County Code Section 18-27 2. You can check which jurisdiction applies to a specific address using the city's tax district lookup tool before assuming which office to contact 3.

Licensing and insurance in Georgia

HVAC contractors working in Georgia, including Marietta and Cobb County, must hold a state Conditioned Air Contractor license issued by the Georgia State Construction Industry Licensing Board, part of the Secretary of State's Professional Licensing Boards Division 4. The license comes in two classes: Class I (Restricted), limited to systems of 175,000 BTU/hour or smaller, and Class II (Unrestricted), which covers any size system 5. Homeowners cannot pull their own mechanical permits for HVAC work; only the licensed contractor of record can, so always confirm a contractor's license is active before signing a contract.

Why Marietta homes push AC systems hard

Cobb County's humid subtropical climate means AC units in Marietta run for months at a stretch, often with little relief overnight during July and August. That extended runtime accelerates wear on capacitors, contactors, and condenser fan motors compared to drier or cooler climates.

Many Marietta homes, especially those built from the 1970s through 1990s, have air handlers and ductwork routed through unconditioned attics. Attic temperatures in summer can exceed 130°F, which stresses equipment and increases duct losses, sometimes losing 20-30% of conditioned air before it reaches a room.

Because of this, a straightforward comfort complaint (a room that never gets cool) is often a duct sealing or attic insulation problem as much as an equipment problem, and a competent contractor should check both before recommending a full system replacement.

Heat pumps vs. gas furnaces in Cobb County

Marietta's mild winters mean heat pumps are a practical primary heating source for most homes, and many newer installations use heat pumps exclusively rather than pairing electric AC with a gas furnace.

Homes with existing natural gas service often keep a gas furnace paired with a separate AC condenser, since gas heat can feel warmer during the occasional hard freeze and gas rates in metro Atlanta remain competitive.

Dual-fuel systems, an electric heat pump backed by a gas furnace for the coldest days, are also common in Marietta and can lower operating costs if sized and controlled correctly.

Permits: City of Marietta vs. Cobb County

Before hiring anyone, confirm whether your address falls inside Marietta's city limits or unincorporated Cobb County, because the permitting office differs. The city's Homeowners Building Permit page has a jurisdiction lookup tool to make this determination 3.

Inside city limits, mechanical permits (required for HVAC installation, replacement, and most repair work involving heating, cooling, ventilation, or gas supply) are handled by Marietta's Building Inspections Division through its online SagesGov portal 1.

Outside city limits, in unincorporated Cobb County, the same type of work requires a permit from Cobb County's Development and Inspections Division, and county code coordinates HVAC and plumbing inspections on the same visit when both trades are involved 2.

In both jurisdictions, only a licensed contractor (not the homeowner) can pull the mechanical permit for HVAC installation or replacement work.

Local utility rebates and programs

Customers of Marietta Power and Water can apply for rebates when converting from gas to an ENERGY STAR electric or dual-fuel heat pump, or when upgrading to a more efficient electric heat pump or central AC system, through the utility's Energy Efficiency Rebate Program 6.

Homes served by Georgia Power instead of Marietta Power and Water may qualify for the Home Energy Improvement Program, which offers a percentage-based rebate on qualifying HVAC-related upgrades such as converting to an air-source heat pump, duct sealing, and attic insulation when the work is done by a program-affiliated installer 7.

Because eligibility and rebate amounts depend on your specific utility provider and current equipment, confirm your provider and program terms directly before assuming a project qualifies.

Areas Henry covers

Downtown Marietta / The Square · East Cobb · West Cobb · Kennesaw Mountain area · Whitlock Avenue corridor · Marietta Country Club area · Hurt Road · Sandtown · Franklin Gateway · Indian Hills · Fair Oaks · Sewell Mill

Common questions

Marietta guides from The Henry Files

Nearby Georgia markets