Companies, like CATCO, who perform mold remediation must properly train and equip their technicians to accomplish the job following the specific protocol determined by an environmental hygienist or inspector.  The equipment and materials needed, as well as the certification training involved, are more expensive than most cleaning products and equipment.  Small, less extensive mold damage may cost less than $1,500, but many mold removal projects requiring professional remediation cost more than $20,000.