Cornerstone Real Estate Management, LLC is a management company located in West Michigan. It is comprised of 5 companies: Real Estate Management, Building and Maintenance, Condo Association Management, Heating & Cooling and Real Estate Group. Corey De Vries is the owner and president. Cornerstone was established in 2009 and is growing yearly. It started in Corey's basement with 30 properties to now managing over 3,000 units in the West Michigan area.