The expense associated with professional mold remediation can vary, typically ranging from $1,500 to $9,000, with the average expenditure sitting around $3,500. Specific mold removal scenarios, such as in a bathroom, can cost between $500 and $1,500. If mold is found in an attic, expect costs from $1,000 to $9,000, whereas basement mold removal projects usually range from $500 to $4,000.