It lets your listing agent answer the question that's CERTAIN to come, "Was the remodel done with permits?" with "YES". That's much more to your advantage than "I don't know", or "Nope".
Says that you do need a permit becuase you are changing the size of the opening. Call the city to confirm but that is how I read it.
Good luck with the remodel!
If your home was built before 1978, then you will want to check out the next link to go over some of the new rules and regulations regarding lead based paint requirements when renovating your home.
I hope this helps! Feel free to contact me with any questions.