M.J. Design Associates, Inc. Share: Landscape ContractorLawn Care & Landscaping Services M.J. Design Associates, Inc. Visit Website 8463 Estates Ct. Plain City, OH 43064 (614) 873-7333 (614) 873-7444 (fax) www.mjdesignassociates.com About About M J Design is a premiere landscape design firm that believes in ''green'' work being done in a ''green'' way.