THIS IS A MULTI UNIT BUILDING/RESIDENTIAL NOT A COMMERCIAL PROPERTY. IT WOULD BE CONSIDERED A DUPLEX THREE UNIT BUILDING. THE FRONT OF THE BUILDING is 1614 W. 78th St. the other part of the duplex building address is 7857 S MARSHFIELD OWNED BY A DIFFERENT OWNER. THERE ARE TWO PIN NUMBERS TO THIS BUILDING. THIS PROPERTY ONLY HAS ONE PIN NUMBER. IN ORDER TO SEE IF YOU NEED TO BRING A SCREWDRIVER IN ORDER TO OPEN THE PROPERTY.