Can you find out if a roof terrace has planning permission?

Question:I am looking at potentially buying a house with a roof terrace. Before i move into the sale i want to check it has planning. Also, would i need planning to build a proper stairway to the terrace - it is currently reached by a folding stairway.

Answers:
I would begin at City Hall if the residence is in city limits. Otherwise check at your local courthouse for county information. They should be able to direct you to the proper place.