ワンフロア

noun

one floor; single floor

Refers to a single floor of a building, often used in real estate, architecture, or when describing a space that occupies an entire floor.

• このオフィスはワンフロアを占しめている。

  This office occupies one entire floor.

• ワンフロアの広ひろさがある店てん舗ぽを探さがしています。

  I'm looking for a store that has the space of a single floor.