Mold Remediation Cost Calculator

National 2026 rates run about $10–$30 per square foot. Surface mold on a dry wall is $10–$16, moderate growth behind drywall is $15–$25, and severe water-damaged or structural mold is $22–$30. A small job typically lands around $500–$1,500 and a whole-home remediation can exceed $10,000.

No. Remediation and clearance testing cover removal, containment, HEPA cleaning, and air sampling only. Reconstruction - new drywall, flooring, paint, and trim that had to be torn out - is billed separately and can equal or exceed the remediation cost when water damage is involved.

You can clean small surface patches under about 10 square feet on hard surfaces with detergent. Anything larger, any black mold (Stachybotrys), or mold tied to a water leak warrants a certified remediator with containment and negative-air HEPA filtration to avoid spreading spores throughout the home.

The $450 clearance air-sampling step is what proves the affected space is actually safe and that spore counts have returned to normal. It protects your health, documents the work for insurance, and is often required disclosure at resale.

Most residential projects fall between $1,500 and $9,000, with a typical midpoint near $3,500. The price depends on the affected area, the severity, the location in the home, and whether there is water damage that also has to be dried out and rebuilt.

Generally only when the mold results from a sudden, covered event, such as a burst pipe or a failed appliance. Chronic leaks, high humidity, and floods are usually excluded. Many policies cap mold payouts at $1,000 to $10,000 even when coverage applies.

Small jobs finish in 1 to 3 days. Moderate projects with drywall demolition and drying take 3 to 7 days. Severe or whole-home contamination can run 2 to 4 weeks, with reconstruction added at the end.