増築

1. Origins, structure, and basic meaning

• Structure: 増築 is read as ぞうちく and is a noun and する verb for extending an existing building by adding a room or other space.
• Basic usage: Adding space appears in 一部屋増築する, while construction work appears in 増築工事.

2. Common pitfalls and similar expressions

• Difference from 新築
  • 新築 is construction of a new building; 増築 adds to one that already exists.
• Difference from 改築
  • 改築 focuses on rebuilding or altering an existing structure, while 増築 focuses on increasing its space.