1. They have their house VS They have their houses

There are 10 people. Every person has 1 house. In this case, should i say "They have their house."? Is "They have their houses" totally wrong?

2. There are a family composed of 10 members and they live in the same house, in this case, can I say "They have their house"?

Thank you in advance!

Question

1. They have their house VS They have their houses

There are 10 people. Every person has 1 house. In this case, should i say "They have their house."? Is "They have their houses" totally wrong?

2. There are a family composed of 10 members and they live in the same house, in this case, can I say "They have their house"?

Thank you in advance!

Answer

I would recommend:

1. They each have a house. OR Every one of them has a house.

2. They have a house.