庁舎

1. Origins, structure, and basic meaning

• Structure: 庁舎 is read as ちょうしゃ and is a noun for the physical building used by a government or public-administration office.
• Basic usage: An interior location appears in 庁舎の一階, while the building itself is the object in 庁舎を見学する.

2. Common pitfalls and similar expressions

• Difference from 役所
  • 役所 broadly denotes a government office or institution; 庁舎 specifically focuses on the building it occupies.
• Parts marked with の
  • Use の in phrases such as 庁舎の入口 or 庁舎の一階 to identify a location or part of the building.