Building over the water and group of these buildings, their maneuvering methods and their hosting sites, the said building and group of buildings offering the flexibility of usage found in both land-based buildings and in ships by the fact that each building over the water consisting of: a superstructure (A) provided with at least one of some floor structures (1) that is placed over a water surface (2), and on which an inhabitable subassembly (3) is positioned, at least one of some supports (B) sitting on ground (4), and positioned under the floor structures (1), and at least one of some mobile floating docks (C) with variable and controllable buoyancy, provided with a load carrying platform (5) positioned under the floor structure (1). The superstructure (A) is sequentially held above the water surface (2) by the supports (B), while sitting on the ground (4), and respectively carried by the floating docks (C), while floating, the superstructure being detachable from the ground (4), and transportable on water on the mobile floating docks (C), thus being possible to reposition the superstructure (A) on ground (4), at a destination of choice.