Colliers Bennett & Kahnweiler Inc., based in Rosemont, IL, has been chosen to market the campus. William Fausone, Kevin Clifton and Joseph Dvorak will be leading the marketing efforts, according to a press release from Colliers Bennett & Kahnweiler. Representatives from the firm did not return calls for comment.

The 504,000-sf building, which was constructed in 1982, is on 65 acres with a lake and walking trails. The building can accommodate 1,500 employees and has an 800-seat cafeteria, a 200-seat auditorium and 37 conference rooms. The property has frontage on Interstate 90 and is just west of the four-way interchange at Route 59.

The facility is "a high-profile, high-quality, single-tenant corporate headquarters facility (and) the versatility and adaptability of the building's design also allows multiple tenant occupancy," Dvorak said in a released statement. Colliers Bennett & Kahnweiler has done several sale/leaseback transactions for Allstate and, in the past 18 months, has sold regional offices and claim centers for Allstate totaling nearly one million sf in Illinois, California, Florida, Virginia, Pennsylvania, North Carolina, Wisconsin and Washington, according to the released statement.