Over 22 years of experience in the Commercial Janitorial Business. More than just a cleaning company, we are your premier pro ... vider of cleaning and building maintenance services in East Tennessee and North Georgia. We currently service over 5 million square feet of facilities and can handle any cleaning job, big or small. Tri-State Building Services provides quality janitorial services for a wide range of commercial facilities including office, manufacturing, health care, educational, stadium and event venues. read more