Owning your own home

Just a bump for a previous question:

Anyone have any experience of applying for and successfully (or not) getting planning permission for a listed building. We're looking at a Grade B* listed building which has had some extension work done however it was only turning stables at the rear into a kitchen.

If we ended up buying this place we'd want to ideally extend the bedrooms (x2) which are in the roof over the top of the kitchen at the rear as the bedrooms are pretty tiny and in the eaves.

I realise its a bit of a case-by-case basis but be interested to hear anyones experience of this.

*Property is in Scotland.