Most U.S. homeowners pay between $100 and $700 for an air duct inspection depending on home size, inspection depth, and region. This guide lists typical air duct inspection cost ranges, per-unit rates, and the main drivers contractors use to price inspections.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Basic visual inspection | $75 | $150 | $300 | Single-system, 1-2 hour visit |
| Video camera inspection (whole house) | $150 | $350 | $700 | Includes digital report and photos |
| Per-vent or per-register check | $10 | $25 | $50 | Often used for partial inspections |
| Mold sampling or lab test | $75 | $200 | $400 | Per sample, not including remediation |
Typical Total Price for a Whole-Home Air Duct Inspection
For a 1,200–2,500 sq ft single-family home with one HVAC system, most full visual + camera inspections run $150-$450; specialized testing (mold, pressure testing) can push totals to $700 or more. The average whole-home video inspection is about $350 including basic photos and a short written summary. Assumptions: suburban market, single-FAU/condensing unit, normal attic access.
Breaking Down the Quote: Materials, Labor, Equipment, Permits
| Component | Low | Average | High | Notes |
|---|---|---|---|---|
| Materials | $0 | $10-$50 | $100 | disinfectant wipes, tape, labels |
| Labor | $75 | $125-$250 | $400 | (1–3 hours) |
| Equipment | $25 | $75-$150 | $300 | camera rental, blower door, sampling kits |
| Delivery/Disposal | $0 | $0-$25 | $50 | rare for inspections |
Labor and camera equipment drive most of the inspection cost; materials are minimal.
How Duct Size, System Type, and Contamination Level Affect Price
Larger duct networks and multi-zone systems increase inspection time and cost: single-system homes typically cost $150-$350, while multi-zone or commercial-style HVAC can be $400-$900. Expect a price jump of 30%-100% when inspecting systems with more than 3 zones or over 3,000 linear feet of ductwork.
Contamination affects price too: visible mold or heavy debris often requires sampling ($75-$400 per lab test) and adds time for documentation and safety measures.
Ways Homeowners Can Cut Air Duct Inspection Price
Limit scope to targeted areas (e.g., problem rooms) at $10-$50 per register instead of a full-house camera run. Booking inspections during shoulder seasons or combining with HVAC service can reduce the blended rate by 10%-20%.
Additional cost-saving measures include clearing attic/crawlspace access ahead of time to reduce labor time and comparing 3 local quotes to avoid single-contractor markups.
How Regional Market Differences Change Inspection Pricing
Prices vary by region: urban Northeast and West Coast markets typically run 10%-30% above national averages; Midwest and South often 5%-20% below. A $350 average in the Sun Belt may equal $420 in a major West Coast city for the same scope.
Assumptions: labor market, local HVAC licensing, average travel distance.
Typical Add-Ons, Repair Fees, and What Costs Extra
| Add-On | Typical Price | When It Applies |
|---|---|---|
| Mold sampling | $75-$400 per sample | Visible suspected mold or occupant illness |
| Pressure testing / leakage report | $150-$450 | Energy audits or detailed diagnostics |
| Minor sealing (re-entry) | $100-$450 | Small leaks found during inspection |
| Full cleaning referral | $400-$2,000+ | Recommended when heavy buildup is present |
Diagnostic tests and any remediation are priced separately and can exceed the inspection cost significantly.
Three Real-World Quote Examples With Specs and Pricing
Example A: 1,400 sq ft suburban home, single system, visual + camera at 1 hour — $150. Minimal debris, easy attic access.
Example B: 2,800 sq ft two-zone house, camera crawlspace + attic, mold sample — $520 ($350 inspection + $120 sample + $50 travel). Multiple zones and one lab sample raised the cost.
Example C: Older rental property with closed ducts, pressure test, and 3 samples — $1,050 ($400 inspection + $350 testing + $300 for samples/lab). Complicated access and contamination tests significantly increased the total.