改築

1. Origins, structure, and basic meaning

• Structure: 改築 is read as かいちく and means “renovation” and “rebuilding”.
• Basic usage: It describes converting an old barn into a residence and rebuilding work beginning on a school building.

2. Common pitfalls and similar expressions

• 納屋を住居に改築する / 改築工事
  • Use 納屋を住居に改築する for conversion to a new use and 改築工事 for the construction project.