Latvian architects of NRJA proposed the concept of developing houses made of prefabricated units. Nomenclature block size is minimal – only 4 types, including the transition. Blocks can be almost any color and have different options for exterior finishing. Locking is provided on all four sides – a roadmap for its development and expansion of growth reminiscent of the space station. Theoretically, the house can be installed anywhere, even in the city, even in the countryside, even on the river, even on the roof.