What do I call a building with a variable number of storeys?
The general design concept of the Solnechny city district provides for the construction of City Block 1.3, a perimeter block with a variable number of storeys.
If I am understanding this correctly the translation means, a perimeter block where the (variable) number/amount, of storeys can be changed I presume this item of change is regarding one building can be of a different amount of storeys than an adjacent building. Rather than in the afternoon it has more stories than in the morning.
In which case I think a better translation would be
a perimeter block with a undefined number of storeys.
undefined; Cambridge English Dictionary adjective: not clearly described, stated, or known:
The general design concept of the Solnechny city district provides for the construction of City Block 1.3, a perimeter block with a undefined number of storeys
