Assbestos

How asbestos testing works

An asbestos test means sending a small sample of the material to an accredited lab, which examines it under a microscope. A professional inspector usually charges about $250 to $850 to visit, take samples and send them to a lab. Mail-in lab tests cost about $30 to $95 per sample.

Option 1: a professional inspector (EPA's recommendation)

EPA describes asbestos inspectors as people who "can inspect a home or building, assess conditions, take samples of suspected materials for testing, and advise about what corrections are needed" (EPA).

  • Why EPA prefers it: "A trained and accredited asbestos professional should take samples for analysis, since a professional knows what to look for, and because there may be an increased health risk if fibers are released."
  • Keep it independent: EPA says an inspector assessing the need for repair or removal "should not be connected with an asbestos firm that does the actual repair or removal of materials."
  • Training rules vary by state. Federal law doesn't require training for people who work on single-family homes, but some states do, and EPA says to hire people who are trained and accredited.
  • Cost: about $250 to $850 for a typical visit with samples, according to Angi, HomeAdvisor, HomeGuide, Forbes Home and Fixr. Whole-house surveys before renovation can cost more.
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Option 2: a mail-in lab test

You take a small sample, mail it to a lab, and get a report. Lab fees run about $30 to $95 per sample (prices). EPA and CPSC don't recommend this ("Taking samples yourself is not recommended"), because sampling can release fibers. CPSC does list precautions if you do it anyway, including:

  • make sure no one else is in the room;
  • turn off heating and cooling systems;
  • wet the material with a fine mist of water with a few drops of detergent before sampling;
  • wear disposable gloves or wash your hands afterward;
  • patch the sampled spot with a small piece of duct tape.

(CPSC). See asbestos test kits.

What the lab does

Labs accredited by NIST's NVLAP asbestos program analyze samples using polarized light microscopy (PLM) for building materials, or transmission electron microscopy (TEM) (NIST). Under federal rules, a material counts as asbestos-containing if it has more than 1% asbestos.

You can check a lab's accreditation in NIST's NVLAP directory.

Air testing

Air tests measure fibers in the air, for example after removal to confirm cleanup. They don't tell you what a material contains. Published costs range from about $200 to $1,200.

Sources

Last reviewed October 29, 2026. See our sources.