This relates to a previous topic, so please see that for some more context.
My basement flat had an extension built in 1985. I've got hold of a copy of the planning decision (granted in 1984). I'm trying to figure out whether the permission granted would allow the room to be used as a bedroom or if a change of use application would be required. The plans submitted with the application label the room as 'new garden room', but there's no other reference to use. The decision seems entirely boiler plate, there's no mention at all of what the intended use of the room is and there are no restrictions or conditions listed that relate to that. As far as I can tell, the term 'garden room' has no legal definition.
So my question is, does a planning decision, particularly one of that era, need to explicitly state that an extension room is or isn't intended to be habitable in order for it to be used as a bedroom?
Thanks in advance for your thoughts