An air tightness test, usually performed with a blower door, costs about $200-$450 for a typical single-family home, with a national average near $300. Price depends on building size, location, test purpose, access, and whether the quote includes an energy audit or leak diagnosis.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Single-family blower door test | $150 | $300 | $450 | One test, basic results |
| Test with energy audit | $300 | $500 | $900 | May include recommendations |
| Commercial building test | $500 | $1,200 | $3,000+ | Depends on area and testing scope |
| Leak sealing after testing | $200 | $800 | $2,500+ | Separate repair work |
What a home blower door test costs by size
For a standard 1,500-2,500-square-foot house, a standalone blower door test commonly runs $200-$450. Smaller homes may start near $150-$250, while large or complex homes can reach $500-$800 when testing takes longer or requires additional measurements. Prices generally cover setup, depressurization, air-leakage readings, and a brief report.
A typical $300 quote is for one accessible home and one standard test, not air-sealing repairs. Testing a new build for code documentation or testing both a house and an attached unit may add fees. Assumptions: U.S. residential property, normal access, one test visit, no extensive diagnostic report.
How equipment, labor, and reporting shape the quote
Most residential quotes combine technician time, blower door equipment, travel, and reporting. The test itself is usually priced as a project rather than a separate equipment rental, because calibrated equipment and interpretation are part of the service.
| Quote component | Typical price | What it covers |
|---|---|---|
| Technician labor | $100-$250 | Setup, testing, and readings |
| Equipment and calibration | $40-$125 | Blower door, fan, and gauges |
| Travel or service minimum | $0-$100 | Distance, dispatch, or minimum charge |
| Written report | $25-$150 | Results, notes, or compliance documentation |
| Leak detection add-on | $75-$300 | Smoke, infrared, or targeted investigation |
Ask whether the written report and travel are included before comparing bids. Labor is often the largest portion of a basic residential test.
Why square footage and leakage targets change test prices
Building size matters because larger spaces can require more setup, equipment adjustments, or multiple test zones. A 1,000-square-foot home may fall near $150-$275, while a home above 3,000 square feet often costs $350-$650. Multifamily buildings and commercial sites are commonly quoted individually, especially when separate units or zones must be measured.
Test purpose also affects the rate. A basic diagnostic test may cost $200-$450, while code or certification testing with prescribed procedures and documentation can reach $300-$700 for a home. A target such as 3 ACH50 or lower may require added diagnostic work if the first reading misses the standard; ACH50 measures air changes per hour at a 50-pascal pressure difference.
Confirm the required test standard and number of zones before accepting a flat quote. Difficult access, unusual layouts, high ceilings, or occupied buildings can also add $50-$300.
How regional labor rates shift U.S. test quotes
Rates tend to be lower where travel and contractor overhead are modest, and higher in expensive metro areas. A basic test in a rural or lower-cost market may run $175-$325; many suburban markets fall around $225-$400; and major coastal cities can reach $300-$550 for comparable service. These are directional differences, not fixed regional tariffs.
Distance and local demand can matter as much as the home’s size. A remote property may incur a $50-$150 travel charge, while a dense service area may have higher labor pricing but no mileage fee. Request a quote that identifies the test, report, and travel charges separately.
What happens during the appointment and how long it takes
A technician typically seals intentional openings, installs a temporary fan in an exterior doorway, and measures airflow as the fan changes indoor pressure. A straightforward home appointment takes about 1-2 hours, including setup and a short review of the results. A detailed audit or leak investigation may take 2-4 hours.
Most basic tests require little preparation, but the technician needs access to exterior doors and mechanical equipment. The service may ask occupants to close windows, turn off combustion appliances, and avoid using exhaust fans during testing. Additional crew members are uncommon for an ordinary house but may be needed for large or multi-zone sites.
When audit packages and leak repairs add to the bill
An energy audit bundled with a blower door test often totals $300-$900, depending on whether it includes utility analysis, infrared imaging, or a written improvement plan. Infrared inspection alone may add $100-$300. If the test identifies leaks, sealing work is a separate expense: basic caulking or weatherstripping can cost $200-$800, while broader attic, rim-joist, or duct sealing may cost $800-$2,500 or more.
Testing measures leakage; it does not automatically include locating every leak or fixing it. Ask whether a follow-up test is included after sealing, as a second visit may cost $100-$250 when priced separately.
Three realistic air tightness test quote examples
| Property and scope | Labor and unit basis | Estimated total |
|---|---|---|
| 1,200-square-foot house, basic test | 1.25 hours; about $0.21 per sq ft | $250 |
| 2,000-square-foot house, report and leak scan | 2 hours; about $0.24 per sq ft | $475 |
| 4,000-square-foot house, detailed testing | 3 hours; about $0.18 per sq ft | $725 |
These examples show how diagnostic scope can outweigh a simple per-square-foot rate. Actual totals vary by market, building layout, travel, and documentation requirements.
How to keep a blower door test within budget
Compare at least two quotes using the same scope: one test, report format, travel, and any required code or certification procedure. Schedule the test alongside an energy audit if both are needed, but verify that bundling is cheaper than separate services. Clear access to doors, attic hatches, and mechanical areas can help avoid delays or return-trip fees.
Choose the least extensive test that meets the project’s actual requirement. Skip infrared imaging or repair estimates if the goal is only to measure leakage, and avoid paying for a compliance report when a basic diagnostic reading is sufficient. For a new home, confirm whether the builder or local program already requires testing before booking a duplicate visit.