ESI Appraisals has been proudly serving Portage, MI and the surrounding areas since 1992. As experienced local appraisers, we are state licensed and certified and have extensive experience in the appraisal field. For accurate appraisals every time, call ESI Appraisals today at 269-324-8980 for all your home apprisen needs.. Call ESI Appraisals today at 269-324-8980 for all your appraisal needs.