A building is shown with its ground plan so far as the scale permits.
Buildings larger than 75 m x 75 m may be represented with a dark grey infill in urban areas.
Passages through buildings must have a minimum width of 0.3 mm (footprint 4.5 m).
Buildings within forbidden areas are generalised.
Areas totally contained within a building shall not be mapped (they shall be represented as being part of the building). Minimum gap indicating a passage between buildings and between buildings and other impassable features should be 0.4 mm.
Minimum area: 0.5 mm x 0.5 mm (footprint 7.5 m x 7.5 m).
Colour: black (or black (outline), black 50%).
The definition of this map symbol was updated on 23.01.2022: Change of colour of large buildings: 60% –> 50%