Metal ductwork typically costs $20-$50 per linear foot installed, or about $2,500-$7,500 for a typical home project. Total price depends on duct length and diameter, layout complexity, sheet-metal type, local labor rates, and whether old ducts must be removed or access openings repaired.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Installed metal ductwork | $20 per linear ft | $35 per linear ft | $50 per linear ft | Standard accessible runs |
| Whole-home installation | $2,500 | $4,800 | $7,500 | Typical existing home layout |
| Sheet-metal materials | $6 per linear ft | $12 per linear ft | $20 per linear ft | Before labor and fittings |
| Removal and disposal | $300 | $800 | $1,800 | Varies with access and duct volume |
Metal ductwork installation prices by home size
For a standard, accessible installation, homeowners often pay $20-$50 per linear foot for metal ductwork, including common fittings and labor. A simple straight run may fall near $20-$30 per foot, while a system with many branches, transitions, tight ceiling cavities, or custom fittings can reach $40-$50 or more per foot.
A partial replacement or new branch serving one room may cost $500-$1,800. Replacing or installing ductwork throughout a 1,500- to 2,000-square-foot home commonly totals $3,000-$7,500. Larger homes, multi-story layouts, and systems requiring extensive access work can exceed that range.
For budgeting, use $35 per installed linear foot as a middle estimate, then add removal, access, and repair charges when needed. Assumptions include standard galvanized steel, ordinary residential access, and no major HVAC equipment replacement.
“Metal ductwork” can include round pipe, rectangular trunk lines, elbows, takeoffs, dampers, and registers. Contractors usually price a complete project by measured runs and fittings rather than multiplying the home’s floor area by a fixed rate. If a quote gives only a total, request the approximate linear footage and a list of included components.
What sheet metal, fittings, and labor add to a quote
Material is only part of the installed price. Fabrication, layout, hanging, sealing, connection to the air handler, and access work can account for a substantial share. The table gives common residential allowances; actual bids may bundle several tasks into one line.
| Quote component | Low | Average | High | Pricing basis |
|---|---|---|---|---|
| Galvanized duct and trunk | $6 | $12 | $20 | Per linear ft, materials |
| Fittings and takeoffs | $150 | $450 | $1,000 | Per project |
| Installation labor | $50 | $85 | $125 | Per worker-hour |
| Hangers, sealant, and insulation | $100 | $350 | $900 | Per project |
| Old duct removal and disposal | $300 | $800 | $1,800 | Per project |
Labor charges reflect more than the time spent attaching pipe. The crew may measure, fabricate or modify sections, suspend duct from framing, seal joints, connect branches, and test airflow. A typical residential installation may require two or three workers for one to three days, depending on access and scope.
Ask whether the estimate includes fittings, sealing, hangers, insulation, and disposal, because omitted items can make a low bid misleading. Labor can be estimated as . For example, 24-40 worker-hours at $75-$110 per hour represents $1,800-$4,400 before materials and other charges.
How duct diameter, layout, and metal gauge change the price
Duct size affects both material use and airflow. A 6-inch round branch generally costs less per foot than a 10- to 14-inch trunk line, although larger ducts may need heavier supports and more room to install. A contractor should size runs from the HVAC system’s airflow requirements, not simply choose the smallest diameter to reduce the estimate.
Layout also matters. A straight, exposed basement run is generally less expensive than duct routed through finished ceilings, narrow attic corners, or multiple floors. Each elbow, transition, branch connection, and balancing damper adds material and installation time. A project with 10 or more branch takeoffs or several concealed runs may cost 15%-35% more than a similarly sized open layout.
Residential metal ducts are commonly made from galvanized steel. Thicker metal or specialty stainless steel can increase material cost; stainless may cost roughly 50%-150% more than standard galvanized duct, depending on thickness and fabrication. Heavier construction may be specified for durability, corrosive conditions, or particular commercial uses, but it is not automatically necessary in an ordinary home.
Scope changes become more expensive when they alter the duct design, not just the amount of pipe. If a project adds more than 100 linear feet, a second floor, or a new trunk line, the contractor may need to revise load calculations, balancing, and support plans. Confirm whether the quote includes those design changes before approving additions.
How to lower a metal ductwork quote without undersizing
The safest savings usually come from reducing unnecessary scope, making access easier, and comparing bids on the same specifications. Keep the existing system layout when it is properly sized and in good condition; replacing only damaged or leaking sections may cost $300-$1,500 for a limited repair, compared with several thousand dollars for a full replacement.
Ask the contractor to identify which runs need replacement and why. A complete changeout can make sense when ducts are corroded, poorly sized, disconnected, or broadly leaking, but sound sections do not necessarily need to be removed. Have airflow and system capacity checked before accepting a proposal to add branches or enlarge every run.
Compare itemized bids that specify duct material, approximate footage, insulation, sealing, removal, and repair work. A quote that omits these details may appear cheaper while leaving important work outside the contract. Request clarification on allowances, change-order rates, warranties, and the charge for concealed damage.
Homeowners can reduce labor time by clearing stored items from basements, attics, and mechanical areas before work begins. However, cutting openings in finished walls, moving electrical wiring, or altering framing should be coordinated with qualified trades. DIY duct installation can create airflow, leakage, or code problems if the design and connections are incorrect.
How regional labor rates shift metal duct prices
Location changes the labor portion of a quote more than the basic price of common galvanized sheet metal. Large metropolitan areas and places with high construction wages may run 10%-25% above a national middle estimate. Rural markets can be 5%-15% lower, but limited contractor availability or long travel distances may offset those savings.
Climate and building practices influence the work as well. In colder regions, ducts in unconditioned attics or crawl spaces may need insulation and careful air sealing. In hot, humid areas, insulation and vapor control can help limit condensation. These measures may add $2-$6 per linear foot for materials and installation, depending on duct size and access.
Use regional percentages as a quote-checking guide, not as a substitute for local bids. For example, a $4,800 middle-range project might be $5,300-$6,000 in a high-wage metro, or $4,100-$4,600 in a lower-cost market with good contractor access. Local permit rules and inspection requirements can also alter the final bill.
Compare at least two or three contractors serving the same area and ask whether travel, permit fees, and disposal are included. A low per-foot figure from a nearby installer may be a better comparison than an out-of-area contractor’s rate that excludes mobilization or access work.
How long a residential metal duct installation takes
A small, accessible repair may take a few hours, while a partial replacement can require one day. A typical whole-home installation often takes two or three working days for a small crew. Work can take longer when ducts run above finished ceilings, through tight crawl spaces, or across multiple levels.
Installation time does not always match the calendar time from approval to completion. A contractor may need to measure first, prepare custom fittings, obtain a permit, and schedule around other HVAC work. Custom rectangular trunks or unusual transitions can add fabrication lead time, while unexpected framing or wiring conflicts can delay installation.
Labor access is a meaningful price driver: difficult attic or crawl-space work can add 10%-30% to installation labor. Ask the estimator to note the crew size, expected workdays, and which areas need to be opened. This makes it easier to distinguish a higher rate caused by real site constraints from an unexplained total.
Some jobs require drywall or ceiling repair after duct access. That work may be excluded from an HVAC estimate and priced separately, often at $200-$1,000 or more depending on the number and finish of openings. Confirm who patches, paints, and cleans the work area.
Three metal ductwork quotes for common home projects
These examples show how scope affects the total. They are planning estimates, not guaranteed market prices, and assume ordinary residential work with standard galvanized steel.
| Project | Scope and labor | Unit estimate | Likely total |
|---|---|---|---|
| One-room branch | 25 linear ft, two workers for 4 hours, accessible basement | $24-$38 per ft | $600-$1,000 |
| Partial replacement | 75 linear ft, three workers for 8 hours, old duct removal | $28-$45 per ft | $2,400-$4,500 |
| Whole-home system | 150 linear ft, three workers for 3 days, multiple branches | $30-$50 per ft | $4,500-$7,500 |
A one-room branch may also require a new register, damper, or connection to the main trunk. If the system needs airflow balancing or a long route through finished space, the total may exceed the example. The partial replacement assumes that the existing air handler and most branches remain usable.
Use each example as a scope comparison rather than a fixed national rate. A 150-foot system with open basement access may fall near the lower end, while a shorter system routed through finished ceilings can cost more per foot. Check whether the total includes permits, insulation, sealing, and debris removal.
For a whole-home estimate, ask for a room-by-room register plan and a description of which trunk lines and branches are being replaced. That documentation helps reveal whether two bids cover the same work and whether the proposed duct sizes match the HVAC equipment.
When metal duct repair costs less than replacement
Repair may be economical when damage is limited to a few leaking joints, a disconnected branch, or a short corroded section. Sealing accessible joints commonly costs $200-$800, while replacing a short section or reconnecting a branch may run $300-$1,500. The cost rises when the defect is hidden behind finished surfaces or requires extensive access openings.
Replacement is more likely to be justified when corrosion affects multiple sections, ducts are crushed or badly undersized, insulation is damaged throughout, or repeated repairs have not solved airflow problems. A contractor should explain whether the issue is a duct defect, a blocked filter or coil, an equipment problem, or poor system balance before recommending wholesale replacement.
Repair is a better value only when the remaining duct system is sound and correctly sized. A patch that leaves widespread leakage, contamination, or inadequate airflow may defer rather than avoid a larger expense. Ask for photos of inaccessible damage and a written explanation of what repairs will restore.
Before deciding, compare a repair quote with a replacement quote that lists the same affected runs. Also check whether repair work has a minimum service charge; diagnostic visits commonly cost $75-$200, and a contractor may credit some or all of that fee toward approved work.
Metal ductwork prices are easiest to evaluate when the estimate separates footage, fittings, labor, removal, and access repairs. A standard project often lands near $35 per linear foot installed, but the final cost depends on the actual layout, local labor, and required system design.