I would be very grateful for any help with these issues. I am in the process of buying a house which has a single storey dining room and sun room (windows floor to high ceiling as split level) which does not have planning permission or a building regulation certificate. The surveyor suspects the build is single block work probably without insulation and a flat roof without insulation but without further investigation he is unable to comment. The room 13'9" x 13'7" plus 13'8" x 8'4". The extension was done at least 16+ years ago. I understand no action can be taken re: the planning and that indemnity insurance can be taken out, my worries are these:-
- If I decide to insulate the outside of the building will I need planning permission? If so, can I do this for a building which does not have permission?
- If I was to put an apex roof on it will I require a buildings reg cert.?
In other words, can I mess around with this extension (and get all the legal documentation in order) without shooting myself in the foot by notifying the planning department?
- how straightforward is it for a surveyor to certify the building safe?
I'm feeling very nervous about this purchase because the room is a feature of the house and I think it will take a huge amount of heating.
Any help or ideas would be greatly appreciated.