Project:  Allstate Headquarters Location:  Northbrook, IL Insulator:  Superl Inc., Chicago, IL Owner:  Allstate Insurance Architect:  Loebl, Schlossman & Hackl,Chicago, IL General Contractor:  Pepper Construction of Chicago email info@superl.net Corporate Headquarters 7301 Apollo Court, Lino Lakes, MN 55014 Phone: (763) 571-7464 Fax: (763) 571-7646