Alabama · HVAC
Ductwork Replacement cost in Alabama
Statewide pricing, permit posture and inspection sequence for ductwork replacement in Alabama. Your city or county issues the actual permit — use the local links below to confirm fees.
Verified August 2026
Ductwork Replacement cost in Alabama
$2,300 – $10,800
Most Alabama homeowners pay around $4,900, or $250–$550 per supply run. Permit fees typically add $75–$270.
Permit: Yes. Code adoption is local — local adoption of the irc; statewide code applies to state-funded and manufactured housing.
Cost breakdown
| Budget scope | $2,300 |
|---|---|
| Typical project | $4,900 |
| Premium / complex | $10,800 |
| per supply run | $250 – $550 |
| Permit fees | $75 – $270 |
| vs national baseline | -10% |
| Timeline | 1-3 days of work, 1-3 weeks including permitting |
What is different about ductwork replacement in Alabama
Coastal Baldwin and Mobile counties enforce wind-borne debris requirements that inland Alabama does not, which changes roofing and window pricing sharply within one state.
Owner-builder: Homeowners may generally permit work on a home they own and occupy, subject to local rules. Ductwork Replacement generally requires a licensed contractor to pull the permit, even where owner-builder status is available.
Inspections
- Duct rough-in
- Duct leakage test
- Final mechanical inspection
What drives the price
- Number of supply and return runs
- Flex duct versus rigid sheet metal
- Attic access and clearance
- Return air sizing corrections
- Removal of contaminated duct board
Frequently asked questions
Does duct replacement need a permit in Florida?
Yes. Replacing a duct system requires a mechanical permit and a duct leakage test in most Florida jurisdictions, because duct leakage is regulated under the energy code.
Sources
Sources & verification
Last verified August 2026. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing — they are not quotes. Permit rules change; confirm with the building department before starting work.