LAKE BLUFF, ILL. — Quantum Real Estate Advisors Inc. has arranged the $1.5 million sale of a single-tenant retail building occupied by Sherwin Williams in Lake bluff, about 35 miles north of Chicago. The 3,799-square-foot building is located at 545 Rockland Road. Sherwin Williams has a 10-year lease at the property. A private real estate investor based in suburban Chicago purchased the asset. Chad Firsel of Quantum represented the seller, a Chicago-based acquisition and development company.