How much does ductwork replacement cost in South Carolina?

Ductwork Replacement in South Carolina typically costs $2,400 to $11,300, with most homeowners paying around $5,100.

South Carolina · HVAC

Ductwork Replacement cost in South Carolina

Statewide pricing, permit posture and inspection sequence for ductwork replacement in South Carolina. Your city or county issues the actual permit — use the local links below to confirm fees.

Model reviewed August 2026

Ductwork Replacement cost in South Carolina

$2,400 – $11,300

Most South Carolina homeowners pay around $5,100, or $250–$550 per supply run. Permit fees typically add $80–$290.

Permit: Yes. South Carolina Residential Code, based on the IRC

Cost breakdown

Budget scope	$2,400
Typical project	$5,100
Premium / complex	$11,300
per supply run	$250 – $550
Permit fees	$80 – $290
vs national baseline	-6%
Timeline	1-3 days of work, 1-3 weeks including permitting

What is different about ductwork replacement in South Carolina

Charleston and Horry County enforce coastal wind and elevation rules plus historic review; upstate Greenville prices and permits like the interior Southeast.

Owner-builder: Homeowner permits allowed on owner-occupied property. 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

Ductwork pricing by city

Ductwork cost in Charleston$2,600 – $12,600 Ductwork cost in Columbia$2,400 – $11,400 Ductwork cost in North Charleston$2,400 – $11,300 Ductwork cost in Mount Pleasant$2,400 – $11,300 Ductwork cost in Rock Hill$2,400 – $11,300 Ductwork cost in Greenville$2,400 – $11,300 Ductwork cost in Summerville$2,300 – $10,900 Ductwork cost in Myrtle Beach$2,300 – $10,900

Permit difficulty by city

Hometriva Permit Complexity Index: review load, added discipline reviews, wind and flood overlays, and how each jurisdiction sets fees.

City	Complexity	Review time	Inspections
Charleston	78/100 · Very complex	7–24 days	5
Columbia	60/100 · Complex	5–19 days	4
North Charleston	73/100 · Complex	6–23 days	4
Mount Pleasant	73/100 · Complex	6–23 days	4
Rock Hill	73/100 · Complex	6–23 days	4
Greenville	73/100 · Complex	6–23 days	4
Summerville	73/100 · Complex	6–23 days	4
Myrtle Beach	73/100 · Complex	6–23 days	4

What South Carolina homeowners reported paying

Invoice amounts submitted for this state, shown beside the model.

Rebates and incentives in South Carolina

What is still claimable, what expired, and where to check your own utility territory.

State home energy rebate programs (HEAR / HOMES)Varies by program

Federally funded, state-administered rebates for heat pumps, panel and wiring upgrades, insulation and whole-home retrofits. Availability, income tiers and funding depend entirely on the state program and can pause when a state's allocation runs out.

U.S. DOE — Home Energy Rebates

DSIRE — every South Carolina incentive by ZIPThe N.C. Clean Energy Technology Center database. The authoritative list of state, utility and local programs.
ENERGY STAR rebate finderUtility and manufacturer rebates by ZIP code for HVAC, water heating and appliances.
DOE Home Energy Rebates — South Carolina statusShows whether the state's HEAR/HOMES program is open, waitlisted or not yet launched.

Frequently asked questions

Do I need a permit for ductwork replacement in South Carolina?

In most jurisdictions this work is permitted and inspected. Requirements are set locally, so confirm the current application and inspection checklist with your building department before work starts.

How long does ductwork replacement take?

1-3 days of work, 1-3 weeks including permitting. Permit review and inspection scheduling are usually the largest source of variation.

What changes the price the most?

The largest cost drivers are number of supply and return runs; flex duct versus rigid sheet metal; attic access and clearance.

Sources

Sources & verification

Model vintage August 2026. The links above are the issuing agencies' own pages — we publish them so you can confirm the current rule yourself, not as evidence that each fact on this page was re-checked with them today. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing, not quotes. Permit rules change; confirm with the building department before starting work.