Janitorial services. WHAT WE DOAt Grand Rapids Building Services, WE CARE about people. Since 1915, we have been a leading provider of exceptional and innovative cleaning services for our customers in education, medical, corporate, and manufacturing facilities throughout Michigan, Illinois, and Indiana.These are facilities were people work, learn, and get well, and where people spend the majority of their hours each day, so were committed to making sure the environment theyre in is healthy, safe, and productive..