Hi Albert,
Firstly, look at the Local Planning Authority's Local Plan. This will tell you whether the area you're looking in has been identified as one for development - or no development, or even limited development. That will give you a clue as to whether or not the LPA will be sympathetic to an application for planning permission (development).

Then ... book an appointment with the LPA to visit them and discuss your plans. They will tell you whether or not any application for development is likely to be successful.
17. Is it a good time to buy?
Hello my landlord has put up my rent to more than I can afford to pay leaving me no option but to move out. I could just about buy something for my family of 3 if I stretch, or shall I continue to rent in the current climate?
Many thanks
Alexander