Replacing residential air ducts typically costs between $1,200 and $7,500 depending on system size, duct material, and access; this article gives practical price ranges, per-unit rates, and the main drivers of the air duct replacement cost. Buyers will see low-average-high totals and per-linear-foot or per-register pricing to help compare quotes.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Whole-Home Replacement (single-story, 1,200–2,000 sq ft) | $1,200 | $3,200 | $7,500 | Assumptions: Basic metal flex ducts, normal attic access. |
| Per Linear Foot (materials + install) | $4/ft | $8/ft | $15/ft | Includes fittings; long runs cost more. |
| Return/Branch Repair (per run) | $100 | $350 | $1,000 | Short branch vs complex trunk work. |
| New Supply Register or Grille | $25 | $75 | $250 | Includes register and minor framing. |
Typical Total Cost To Replace Home Air Ducts
Whole-home replacement for a typical 1,200–2,000 sq ft house usually runs $1,200-$7,500 with an average near $3,200 when using mid-grade flexible metal ducts and standard attic access. Expect low-end jobs to be small partial replacements and high-end jobs to involve sheet-metal trunkwork, multiple levels, or extensive duct sealing.
Assumptions: Median U.S. labor rates, standard 8–10 supply/return registers, no major HVAC unit changes.
Material, Labor, Equipment, and Disposal Line Items
This breakdown shows common quote categories contractors include when estimating air duct replacement costs. Reading each line item prevents surprise add-ons at invoice time.
| Materials | Labor | Equipment | Delivery/Disposal | Contingency |
|---|---|---|---|---|
| $300-$2,000 (flex, spiral, sheet-metal) | $400-$3,000 () | $0-$400 (scaffolding, lifts) | $50-$600 (debris haul) | $100-$1,000 (unexpected repairs) |
How Size, Duct Type, and Accessibility Change The Quote
Key variables alter the final price: square footage, duct material, attic access, and number of registers. For example, flexible duct runs cost about $4-$9 per linear foot while sheet-metal trunk and branch systems often cost $10-$20 per linear foot.
Numeric thresholds: adding more than 200 linear feet of duct work typically pushes a project into the mid-price range; projects requiring rooftop access or crawlspace work add $500-$2,000 depending on complexity.
Practical Ways To Lower Air Duct Replacement Price
Buyers can control scope and timing to reduce cost: repair instead of replace branches, schedule work off-peak, and keep access clear to reduce labor hours. Obtaining multiple itemized quotes and accepting standard materials (flex or foil-over-fiberglass) instead of premium sheet-metal cuts average prices significantly.
Other levers: bundle duct replacement when replacing the air handler to save on mobilization, and perform simple prep (attic insulation removal/replacement) yourself if safe and allowed.
Regional Price Differences Across the U.S. Market
Prices vary by region: urban Northeastern and West Coast markets are about 10%-30% higher than Midwest and Southern markets due to labor and permit costs. Expect Midwest averages near $2,500 while West Coast average jobs often exceed $3,500 for the same scope.
Assumptions: regional labor cost deltas, similar material choices.
Typical Job Duration, Crew Size, and Hourly Rates
Most whole-home duct replacements take 1-3 days with a 2-4 person crew; smaller branch repairs can be 2-8 hours. Contractor hourly rates commonly run $75-$125 per hour per technician, and total labor often equals 8–24 crew-hours for an average home.
Example: 3 workers × 10 hours × $90 = $2,700 labor estimate for a complex day.
Common Add-Ons, Removal Fees, and Hidden Charges
Contractors often list additional fees for mold/insulation remediation, new boots/register collars, framing patching, and permits. Allow $100-$1,000 extra for remediation or drywall repair and $50-$250 for permit and inspection fees in many jurisdictions.
| Add-On | Low | Average | High |
|---|---|---|---|
| Mold/Insulation Remediation | $100 | $500 | $2,000 |
| Drywall/Sheetrock Repair | $75 | $300 | $1,200 |
| Permit/Inspection | $0 | $75 | $250 |
| New Registers/Grilles | $25 | $75 | $250 |
Three Real-World Quote Examples With Specs
Example 1: Small split-level, 900 sq ft, 80 ft total flex runs, 6 registers — $800-$1,400. Work: replace short runs and two return boots; no attic work.
Example 2: 1,800 sq ft two-story, 220 ft mixed flex and metal trunk, 10 registers — $2,800-$4,200. Work: new metal main trunk, branch flex, new boots, moderate attic access.
Example 3: 3,200 sq ft custom home, 500 ft sheet-metal, rooftop access, multiple levels — $6,000-$12,000. Work: full sheet-metal system, rooftop safety, drywall repair, permits included.