Calculator

Air Duct Replacement Cost Calculator

Estimate duct replacement cost from your home's size, run count and how hard the attic or crawlspace is to work in.

Model reviewed August 2026

Price it for my market

Select a state to re-price the estimate with local labor and material costs.

Conditioned area(sq ft)

Cost per square foot($)

Supply runs

Cost per run($)

Access

Permit fee($)

Estimated total cost

$7,095 – $10,077

Cost per square foot: $4
Cost per supply run: $806

Estimates only. Local pricing, site conditions and code requirements change the real number.

Price this job in your state

This page uses the national average. Pick your state for the same tool re-priced with local labor, material and permit-fee indexes.

Ductwork Replacement Cost Calculator — Alabama-10% vs national Ductwork Replacement Cost Calculator — Alaska+34% vs national Ductwork Replacement Cost Calculator — Arizona+0% vs national Ductwork Replacement Cost Calculator — Arkansas-13% vs national Ductwork Replacement Cost Calculator — California+31% vs national Ductwork Replacement Cost Calculator — Colorado+8% vs national Ductwork Replacement Cost Calculator — Connecticut+19% vs national Ductwork Replacement Cost Calculator — District of Columbia+24% vs national Ductwork Replacement Cost Calculator — Delaware+5% vs national Ductwork Replacement Cost Calculator — Florida+4% vs national Ductwork Replacement Cost Calculator — Georgia-6% vs national Ductwork Replacement Cost Calculator — Hawaii+62% vs national Ductwork Replacement Cost Calculator — Idaho-4% vs national Ductwork Replacement Cost Calculator — Illinois+9% vs national Ductwork Replacement Cost Calculator — Indiana-8% vs national Ductwork Replacement Cost Calculator — Iowa-10% vs national Ductwork Replacement Cost Calculator — Kansas-12% vs national Ductwork Replacement Cost Calculator — Kentucky-11% vs national Ductwork Replacement Cost Calculator — Louisiana-5% vs national Ductwork Replacement Cost Calculator — Maine+6% vs national Ductwork Replacement Cost Calculator — Maryland+12% vs national Ductwork Replacement Cost Calculator — Massachusetts+26% vs national Ductwork Replacement Cost Calculator — Michigan-3% vs national Ductwork Replacement Cost Calculator — Minnesota+5% vs national Ductwork Replacement Cost Calculator — Mississippi-15% vs national Ductwork Replacement Cost Calculator — Missouri-10% vs national Ductwork Replacement Cost Calculator — Montana+0% vs national Ductwork Replacement Cost Calculator — Nebraska-11% vs national Ductwork Replacement Cost Calculator — Nevada+6% vs national Ductwork Replacement Cost Calculator — New Hampshire+10% vs national Ductwork Replacement Cost Calculator — New Jersey+21% vs national Ductwork Replacement Cost Calculator — New Mexico-6% vs national Ductwork Replacement Cost Calculator — New York+28% vs national Ductwork Replacement Cost Calculator — North Carolina-7% vs national Ductwork Replacement Cost Calculator — North Dakota-2% vs national Ductwork Replacement Cost Calculator — Ohio-7% vs national Ductwork Replacement Cost Calculator — Oklahoma-13% vs national Ductwork Replacement Cost Calculator — Oregon+14% vs national Ductwork Replacement Cost Calculator — Pennsylvania+5% vs national Ductwork Replacement Cost Calculator — Rhode Island+17% vs national Ductwork Replacement Cost Calculator — South Carolina-8% vs national Ductwork Replacement Cost Calculator — South Dakota-10% vs national Ductwork Replacement Cost Calculator — Tennessee-10% vs national Ductwork Replacement Cost Calculator — Texas-5% vs national Ductwork Replacement Cost Calculator — Utah-3% vs national Ductwork Replacement Cost Calculator — Vermont+8% vs national Ductwork Replacement Cost Calculator — Virginia+3% vs national Ductwork Replacement Cost Calculator — Washington+16% vs national Ductwork Replacement Cost Calculator — West Virginia-12% vs national Ductwork Replacement Cost Calculator — Wisconsin-2% vs national Ductwork Replacement Cost Calculator — Wyoming-2% vs national

The formula

Cost = (sq ft x rate) + (runs x per-run cost) x access multiplier + permit

Duct replacement is priced mostly by labor hours. Tight crawlspaces and low attics can add 30–50% over an open, walkable space.

Worked example

Replacing ductwork in a 1,800 sq ft home with 10 supply runs typically runs $6,000 to $9,500.

Frequently asked questions

How much does it cost to replace ductwork?

Whole-home duct replacement usually runs $3,500 to $12,000 in 2026, or roughly $2 to $4 per conditioned square foot.

Should I replace ducts with the HVAC system?

If ducts are over 20 years old, undersized or badly leaking, doing both at once saves labor and protects the new system's efficiency rating.

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.