豪邸

1. Origins, structure, and basic meaning

• Structure: 豪邸 (ごうてい) is a large, luxurious residence. It appears as an existing building and a filming location.
• Basic usage: A mansion with a broad garden stands on a hill; an old mansion is used for filming.

2. Common pitfalls and similar expressions

• Luxury home standing on a hill and building used as a set
  • The first が presents existence; the second passive が使われた makes the building the used object. The term evaluates luxury, not size alone.