The typical ductwork cost per square foot ranges from $4-$15 depending on material, layout, and labor; whole-home installs usually run $1,200-$8,000 total. This article shows per-square-foot pricing, total estimates, and the main drivers that change the final price for ductwork.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Basic Flex Duct (per sq ft) | $4 | $6-$8 | $10 | Assumptions: single-story, short runs, standard 6″–8″ duct. |
| Sheet Metal Duct (per sq ft) | $6 | $9-$12 | $15 | Assumptions: insulated spiral or rectangular, moderate complexity. |
| Supply + Return Full Home (typical) | $1,200 | $3,500-$5,500 | $8,000 | Assumptions: 1,200–3,000 sq ft home, existing plenums. |
| Repair / Reroute (per linear ft) | $8 | $12-$20 | $30 | Assumptions: access in attic or crawlspace. |
Average Total Price For Replacing Ductwork In a Typical Home
Replacing ductwork in a 1,500–2,500 sq ft U.S. home typically costs $2,500-$6,000, with $3,500 as a common mid-range estimate. Average full-system replacement: $3,500-$5,500 for standard sheet metal or mixed flex/metal systems.
Assumptions: Midwest labor rates, standard materials, normal access, 10–20 registers, no major layout changes.
Breakdown Of Major Quote Components For Ductwork Pricing
Typical bids separate Materials, Labor, Equipment, Permits, and Disposal so buyers can compare line items.
| Materials | Labor | Equipment | Permits | Delivery/Disposal |
|---|---|---|---|---|
| $0.50-$6 per sq ft (flex $0.50-$2; sheet metal $3-$6) | $75-$125 per hour; total labor $800-$3,000 | $50-$300 (lift rental) or included | $0-$300 (local) | $50-$500 depending on debris |
How Duct Type Changes Price Per Square Foot
Material choice drives the per-square-foot rate: flex is cheapest, spiral/round sheet metal is mid, and insulated rectangular or high-grade galvanized runs cost most. Expect $4-$8 per sq ft for flex installations versus $9-$15 per sq ft for high-quality sheet metal runs.
Assumptions: pricing includes basic insulation for metal and standard fittings for flex.
Site Conditions And Length That Significantly Shift Quotes
Tight spaces, long runs, or multiple bends increase labor hours and material. Jobs with >100 linear ft of runs or more than 10 major bends typically add 15%-40% to base estimates.
Numeric thresholds: projects with >200 linear ft often hit the high range; attic-only jobs under 100 linear ft can fall to the low range.
Practical Ways To Reduce Ductwork Cost Per Square Foot
Control scope, choose simpler duct types, and prep the site to reduce time. Removing old insulation yourself, consolidating runs, and scheduling work off-peak can cut prices by 10%-25%.
- Opt for spiral round metal instead of custom rectangular where possible.
- Bundle HVAC and ductwork with furnace/AC replacement to lower mobilization fees.
- Provide clear attic/crawlspace access and remove obstacles before installers arrive.
Regional Price Differences And What To Expect In Major U.S. Markets
Costs vary by region: urban coasts run higher, Midwest and South are lower. Expect ~+15%-30% in Northeast/California versus Midwest baseline prices.
| Region | Low | Average | High |
|---|---|---|---|
| Midwest/South | $4 per sq ft | $6-$9 per sq ft | $12 per sq ft |
| Northeast/West Coast | $6 per sq ft | $9-$12 per sq ft | $15 per sq ft |
Common Add-Ons, Time Estimates, And How They Affect Final Price
Accessories and complications add to per-square-foot figures: boots, dampers, balancing, and insulation each carry separate charges. Expect 4-12 hours of crew time for a typical 1,500–2,500 sq ft replacement; crews charge $75-$125 per hour.
Typical add-on ranges: $200-$800 for balancing, $50-$200 per register installation, $300-$1,200 for new returns or plenums.
Three Real-World Quote Examples To Help Budget
| Scenario | Specs | Labor Hours | Total |
|---|---|---|---|
| Small Replacement | 1,000 sq ft, flex, attic, 60 linear ft | 8–12 | $1,200-$2,000 |
| Mid Home Replacement | 1,800 sq ft, mixed sheet/flex, 140 linear ft | 16–24 | $3,500-$5,500 |
| High-Complexity Job | 3,200 sq ft, custom rectangular, ducts in walls | 30–50 | $7,000-$12,000 |
Questions That Directly Affect The Price Buyers Should Ask Contractors
Ask about material grade, insulation R-value, estimated linear feet, access charges, and warranty. Request itemized bids showing per-linear-foot and per-register pricing to compare contractors accurately.
Assumptions: prices reflect common U.S. market conditions; actual quotes will vary by local labor, demand, and material lead times.