Where a party is assigned a mortgage on property within the city of Chicago, it is not a “beneficial interest in real property” and therefore is not subject to the Chicago real estate transfer tax.The 1st District Appellate Court reversed the decision of Cook County Circuit Judge Carl Anthony Walker.The city of Chicago instituted a real estate transfer tax “upon the privilege of transferring title to, or beneficial interest in, real property located in the city[.]” The statute defines &ldquo …