の隣です

is next to

→ の
phrase Rare #29,386
is next to A polite way to say that something is beside or next to a person or place. The の connects the reference point to 隣, meaning “the next-door position of”; です makes the statement polite.
JA: コンビニは駅の隣です。
EN: The convenience store is next to the station.

事務所の隣ですから

Because it’s next to the office.

— サイコ (1960)

アメリカカナダの隣です

The United States is next to Canada.

銀行は郵便局の隣です

The bank is next to the post office.