WINNETKA, ILL. — Essex Realty Group Inc. has brokered the sale of 454 Winnetka Ave. in Winnetka, 16 miles north of Chicago, for $7.2 million. The 52-unit apartment building includes two studios, 16 one-bedroom and 7 two-bedroom units. The property also features 6,000 square feet of office suites on the first floor. The building was renovated 10 years ago. Matt Welke of Essex brokered the transaction. Neither the buyer nor the seller was disclosed.