Are these sentences OK?
Are you having fun doing this?
Are you bringing anyone to dinner?
House prices around here have soared in the last few months.
We hated each other for the first few months, but then we loved each other.

Question

Are these sentences OK?
Are you having fun doing this? 
  Are you bringing anyone to dinner?
  House prices around here have soared in the last few months.
  We hated each other for the first few months, but then we loved each other.

Answer

All of your sentences are correct however, I feel like you should write "skyrocketed" or "increased" instead of "soared".

Answer

Yup! Very good. I think, in America, we're more likely to say "are you having fun doing that?" But it's hard to correct without context.