Units 5A, 5B, 5C, located on the fifth floor, shall include the right to access use of the roof immediately above the apartment. The roof will be a part of limited common area type of construction on the roof/terrace which can be done without a permit is strictly limited to a structure of temporary use that can be easily removed upon discontinuance of such use, e.g. deck, storage facilities. No structure which requires a permit from the Department of Buildings can be built as of right (i.e., without a variance).