階かい建だて

suffix

-story building; -storey building

Suffix attached to a number to indicate the number of floors of a building, e.g. 3階建て (three-story building).

• あのビルは10階かい建だてです。

  That building is a ten-story building.

• 2階かい建だての家いえに住すんでいます。

  I live in a two-story house.