Ductwork cost commonly ranges from $1,500 to $7,000 for a partial replacement and $5,000 to $15,000 for a full-home installation. The estimate depends on home size, duct material, access, layout changes, labor rates, and whether old ducts need removal or the HVAC system needs modifications.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Partial duct replacement | $1,500 | $3,500 | $7,000 | Several branches or a limited zone |
| Full duct installation | $5,000 | $9,000 | $15,000 | Typical single-family home, standard access |
| Flexible duct material | $2 | $4 | $6 | Per linear foot, materials only |
| Sheet-metal duct material | $5 | $9 | $15 | Per linear foot, materials only |
Typical ductwork prices by home size and scope
For a standard 1,500- to 2,000-square-foot home, replacing accessible ductwork often costs $5,000-$10,000. A larger 2,500- to 3,000-square-foot house may run $8,000-$15,000, especially if it has multiple floors, long runs, or difficult attic and crawlspace access. Small repairs, such as sealing a few joints or replacing a short branch, may cost $200-$800.
These figures generally assume standard residential materials, ordinary access, and no major HVAC equipment replacement. A new duct layout for an addition or a home without existing ducts can cost more than a like-for-like replacement. Assumptions: U.S. midrange labor, standard materials, normal access, and no major structural repairs. For a whole-home estimate, $5,000-$15,000 is a useful starting range, not a guaranteed quote.
What duct materials and installation tasks add to a quote
A contractor’s price usually combines duct and fitting materials, labor, sealing, supports, and equipment setup. Removal and disposal may be separate line items. Compare quotes by checking whether each includes the same rooms, registers, insulation, testing, and cleanup.
| Quote component | Low | Average | High | Typical basis |
|---|---|---|---|---|
| Duct and fittings | $800 | $2,000 | $4,500 | Flexible duct; sheet metal can cost more |
| Labor and installation | $1,500 | $3,500 | $7,000 | Roughly 20-60 crew hours |
| Sealing and insulation | $250 | $700 | $1,500 | Depends on duct length and location |
| Removal and disposal | $200 | $600 | $1,500 | Existing duct quantity and access |
| Testing or balancing | $150 | $350 | $700 | Airflow checks and adjustments |
Amounts are typical component ranges, not fixed add-ons; a bundled quote may allocate costs differently. Sheet-metal transitions, dampers, return-air pathways, and new registers can add material and fitting costs. Ask whether the total includes sealing, insulation, disposal, and airflow balancing before comparing bids.
How duct length, size, and access change the estimate
Linear footage and duct diameter affect both material needs and installation time. A straightforward replacement with 100-150 linear feet of duct may cost far less than a 250-foot layout serving several floors. Undersized ducts can restrict airflow, so a contractor may recommend resizing branches rather than simply copying the existing dimensions.
Access is another major price driver. Open basement ceilings can keep labor near the lower end, while enclosed ceilings, tight crawlspaces, or finished walls can add $500-$3,000 for extra labor, access openings, and patching. Reconfiguring a layout or adding a return can add roughly $300-$1,500 per location, depending on framing and finish work. Quotes should specify duct diameter, approximate footage, and which rooms or registers are included.
How many labor hours does duct installation take
A small repair may take 2-6 hours; replacing accessible ducts in a modest home often takes a two-person crew 1-3 days. A complex whole-home job can require 3-5 days, particularly when the crew must work around finished ceilings, remove old material, or coordinate with other trades. Labor rates commonly fall around $50-$100 per worker-hour, with local minimum charges affecting short visits.
For example, 40 combined crew hours at $75 per hour equals $3,000 in labor before materials, disposal, and overhead. Ask whether the quoted hours represent each worker’s hours or total crew hours; two workers on site for 10 hours generally equal 20 worker-hours. Confirm the crew size, expected workdays, and any separate service-call fee.
How regional labor rates shift ductwork prices
Prices in high-cost metropolitan areas can run 15%-30% above a national midrange estimate, while many rural markets may be 5%-15% below it. These differences reflect wages, contractor availability, travel distance, and local code requirements rather than a predictable difference in duct material prices. Older homes in dense cities may also cost more because equipment and materials are harder to move through narrow access points.
Seasonal demand can affect scheduling and availability, especially during extreme heating or cooling weather. A nonurgent replacement scheduled during a contractor’s slower period may offer more appointment flexibility, but discounts are not guaranteed. Compare at least three itemized quotes from contractors familiar with local permits and inspection rules. Use local estimates for the final budget instead of applying one national average to every market.
When duct repair costs less than replacement
Sealing accessible leaks or replacing a damaged branch can make sense when the rest of the system is intact. Sealing a small section may cost $200-$500; a more involved repair with insulation or access work can reach $500-$1,500. Whole-system replacement is more likely to be considered when ducts are badly deteriorated, contaminated, poorly sized, or repeatedly leaking across multiple rooms.
Ask the contractor to identify the damaged sections and explain whether repair improves airflow and comfort throughout the home. If ducts are inside difficult-to-reach cavities, the labor for a small repair can approach the price of replacing a larger accessible section. Cleaning is not a substitute for repair when ducts are crushed, disconnected, or leaking. Compare the written repair price with the replacement price for the affected zone, not just the entire system.
Which estimate choices can lower ductwork cost
Keep the project scope clear by listing the rooms, branches, and returns that need work. A like-for-like replacement is often less expensive than changing the layout, moving registers, or adding zones. However, retaining undersized or damaged ducts solely to save money can leave airflow problems unresolved.
Choose materials based on location and design rather than selecting the cheapest option for every run. Flexible duct can be economical for short, accessible branches; rigid metal may suit exposed or longer runs but can raise material and fitting costs. Homeowners can clear storage near attic or crawlspace access before the crew arrives, but should leave cutting, electrical work, and duct sizing to qualified trades. Control layout changes and compare complete, itemized bids to reduce the chance of paying for unnecessary work.