We were given a room in the DD 694 annex building approximately 50 meters away from the main hotel. I was not aware that i was making a reservation in the annex building. I am not certain if this is the fault of the hotel or if it was hotels.com's fault. There was a terrible mildew smell in the annex building, especially in the hallway. It was okay in the room itself, but the halfway was dreadful. The room itself was okay. It was small and the floors were not level, but that is not a surprise in Venice. Breakfast is held in the main building and i did not detect any bad smells in the main building. In addition to the smell, the area was very noisy, particularly on Saturday night. It seemed to be a hangout spot for young kids, one of whom was urinating into the canal as we walked by. Perhaps if i had stayed in the main building, i might have given it 4 or 5 stars, but i would not stay in the annex building again.