There are currently 70 docks which house 507 Floating Homes These docks are located in four primary neighborhoods around Lake Union. Each of the neighborhoods of Eastlake, Westlake, Northlake and the University District have their own unique character. Floating Homes are structures supported by a flotation system—Logs or Concrete with Styrofoam or air filled barrels. They are NOT classified as vessels. Regulated as Residential Structures, they are subject to building codes. They are permanently attached to utilities (water, sewer, electricity). Although capable of being moved, they are typically never moved, except to be towed into place.