The first step is a professional inspection to locate the full extent of the hidden growth and identify the AC leak’s root cause. Reputable inspectors use tools like moisture meters and borescopes to see inside walls without unnecessary damage. They should provide a clear protocol for remediation, not just a price. Treatment for a situation like yours often involves controlled removal of affected drywall, HEPA vacuuming, and antimicrobial treatment of the cavity. The AC unit and drain line must also be serviced to stop the leak; otherwise, the mold will return.

Costs are driven by the extent of contamination and repair work needed. For a contained wall patch from an AC leak, expect a more involved process than a simple surface clean, but less than a full-room remediation. Always request a detailed assessment and quote that breaks down inspection, containment, removal, and verification testing. Companies with their own microbiology lab can provide tangible before-and-after data, which is crucial for verifying the cleanup’s effectiveness.