A building development, having a building arranged on a building development base, wherein the building development base has a pontoon having at least one float for floating on a liquid and a pile mooring, which extends through a passthrough opening of the pontoon along a pile mooring axis (X) perpendicularly to the pontoon. The passthrough opening is configured centrally in the pontoon, and the pontoon is rotationally movably mounted around the pile mooring that extends through the passthrough opening. The pontoon can be aligned and positioned around a pile mooring axis (X), wherein the pile mooring projects into the receiving chamber through the passthrough opening of the pontoon and through a first breakthrough arranged in a bottom of a receiving chamber, arranged above the passthrough opening. The invention relates further to a building development base and a pile mooring of such a building development.