We have to have our house materials approved in the usual way by the planner. I know that now in the county where my parents live they have to submit a formal application for approval of the materials being used ie bricks tiles etc. I did ask our council and they said that if we told them what we'd be using then they'd deal with approval - no formal application needed (they'd pop up and take a look) - I e-mailed our planning case officer with our type of tile we'd be using recently and have so far heard nothing.
What's your experience of this process? By the way - our roof tile looks similar to next door (all the houses down our road are different) and the house is being painted....