Mississippi · HVAC
Ductwork Replacement cost in Mississippi
Statewide pricing, permit posture and inspection sequence for ductwork replacement in Mississippi. Your city or county issues the actual permit — use the local links below to confirm fees.
Verified August 2026
Ductwork Replacement cost in Mississippi
$2,100 – $10,200
Most Mississippi homeowners pay around $4,600, or $200–$500 per supply run. Permit fees typically add $70–$255.
Permit: Yes. Code adoption is local — local adoption of the irc; coastal counties enforce wind requirements.
Cost breakdown
| Budget scope | $2,100 |
|---|---|
| Typical project | $4,600 |
| Premium / complex | $10,200 |
| per supply run | $200 – $500 |
| Permit fees | $70 – $255 |
| vs national baseline | -15% |
| Timeline | 1-3 days of work, 1-3 weeks including permitting |
What is different about ductwork replacement in Mississippi
The six coastal counties carry wind-borne debris and elevation rules; much of the interior has minimal residential permitting, which is the biggest single cost split in the state.
Owner-builder: Homeowner permits widely allowed. 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.