Home Q&A: Does a roof garden need planning permission?

I am sale agreed on a terraced house. There is a flat-roof extension out the back, ideal for a roof garden. But do I need planning permission? 

A city-centre roof garden. File picture

I am currently sale agreed on a terraced two-up-two-down house in Dublin 3. There is a flat roof extension out the back, which would be ideal for a roof garden. My question is, do I need planning permission for a roof garden? The information online is contradictory. I read a piece you wrote about your roof garden with avid interest.

ANSWER