No. 3 is a second floor apartment. You enter the building through the opening indicated, and go up to the 2nd floor. The door key will be in the metal box on the wall secured with a combination lock. You will have been told the combination.
The accomodation consists of a large living room / dining room / kitchen, two double bedrooms and two bathrooms. There is a roof terrace accessed by an external staircase from a private utility balcony. There are four other balconies. Three are in the 'turrets' at the corners, off the bedrooms and the dining area, the fourth is a bay off from the lounge area.