Mold Remediation Cost Per Square Foot Calculator

The quickest way to sanity-check a mold quote: multiply the affected area by the per-square-foot rate. Enter both for an instant total.

Quick answer

Professional mold remediation generally runs $10–$30 per square foot of affected area. At $20/sq ft, a 150 sq ft job is about $3,000 before inspection and testing fees.

How this calculator works

This is a straight area × rate multiplication — useful for comparing quotes on a like-for-like basis. For a fuller estimate including inspection, containment, and testing, use the main mold remediation cost calculator.

What changes the number

Published rates usually cover labor, containment, and basic cleanup — but not demolition or rebuild.
Rates rise for black mold, tight access, and hazardous disposal.
Always confirm whether a quote’s rate includes the post-job clearance test.

Frequently asked questions

What is a normal per-square-foot mold rate?

Roughly $10–$30/sq ft for most jobs, with black mold and difficult access at the upper end.

Does the rate include fixing the leak?

Usually not. The moisture source — a leak, seepage, or ventilation issue — is typically a separate repair.