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Gas furnace replacement cost in Birmingham, AL

Installed, 80,000 BTU, 95%+ efficiency

Low$4,350
Typical$4,650
High$5,550

Metro area: Birmingham, AL. Wages: BLS, May 2025. Permit notes checked October 2026.

A typical furnace (80,000 BTU, 95%+ efficiency) costs about $4,650 installed in the Birmingham area, 4% below the national figure, because HVAC technicians here earn a median $23 an hour against $29 nationally.

Gas furnace (80,000 BTU, 95%+ efficiency), installed

Prices for: Birmingham, AL

Low$4,350
Typical$4,650
High$5,550

Unit $1,700 (online list price, middle of 9 listings) plus installation about $2,950 for this area. Permit fees and code extras are listed below the table.

How this estimate is built

Prices by size in Birmingham

SizeLowTypicalHighNational typical
60,000 BTU, 80% efficiency$3,600$3,950$5,100$4,100
60,000 BTU, 95%+ efficiency$4,300$4,550$5,400$4,750
80,000 BTU, 80% efficiency$3,650$3,900$4,700$4,050
80,000 BTU, 95%+ efficiency$4,350$4,650$5,550$4,850
100,000 BTU, 80% efficiency$3,850$4,100$5,150$4,250
100,000 BTU, 95%+ efficiency$4,500$4,800$5,600$4,950

Local labor: what HVAC technicians earn here

Hourly wageBirmingham metroUnited States
25th percentile$21$23
Median$23$29
75th percentile$29$37

The Birmingham market

Birmingham's Technical Code requires a permit to install, alter, repair, remove, convert or replace plumbing, mechanical and gas systems, with exemptions for repairs or replacements of components with similar equipment. Notably, the code exempts repair of a gas-fired furnace and "repair or replacement of condensing unit," while vent and gas piping work still needs a Gas permit; the Building Official interprets these exemptions. Mechanical jobs get rough-in and final inspections, and gas piping finals include a pressure test. A homeowner may do their own plumbing in a single-family home but still needs a permit and inspections, and larger jobs require a licensed contractor. Fees were not confirmed. DOE puts Jefferson County in mixed-humid zone 3A, and EIA's 2020 survey found 64% of Alabama homes heat with electricity and 39% with a central heat pump.

Only 45% of Alabama homes use a furnace, so ask whether a heat pump would serve your house better. In a mixed-humid climate, the furnace often works fewer hours than the AC beside it. When you do replace one, ask each bidder to list AFUE and confirm the coil matches the outdoor unit. A gas furnace in a crawlspace or attic should have its flue and condensate line checked as part of the install. Get the model numbers in writing.

Permits in Birmingham

We couldn't confirm all of Birmingham's rules from official pages. Check with the building department before work starts.

Permit for this jobYes for system replacement; exempt for repair of a gas furnace and 'repair or replacement of condensing unit' (per Technical Code exemptions) (source)
FeeNot stated on the city pages we checked
Who can pull itPlumbing: single-family homeowner may do own plumbing (with permit, inspections, fees); jobs of $10,000+ require a licensed contractor; gas and plumbing reference Master Gas Fitter / master plumber.
InspectionYes

Rebates in Alabama

HEAR: announced, not open yet. HOMES: announced, not open yet. Source: ADECA Energy Division, checked October 13, 2026.

What these programs cover, and other states

Other systems in Birmingham

Gas furnace cost in other metros

Sources