An early example of the house type - the Nyboder houses in Copenhagen dating from the early 17th century.
Here the term low level refers to houses that are or were self contained and have a single main floor at or raised just above street level but they might also have basements and attic rooms.
This is a house type in Scandinavia that has a long history. In part the construction was relatively simple - at it’s simplest just four solid outside walls supporting a pitched roof - and the walls can be timber, brick or stone. They can be built as a single detached house or can be linked together in a row or terrace. They can have a single room but could be much larger with two or three or more rooms in line across the front and if the house was deep, with larger gables and therefore a larger roof space, there could be a large room to the front and a narrow room behind on the ground floor - sometimes called one-and-a-half room plan - or there could be two rooms to the depth - in England called a double pile plan - and with deeper houses there is more space and more useable space in the roof with greater head room.
Why is this relevant for a blog that is ostensibly about modern design?