Couldn't really find the answer through searches so I'm asking here.
What I'm asking about is a studio building (not a studio apartment) which has a maximum size of 20m². These can be built in addition to a granny flat and cannot be lived in like the granny flat.
Can this be rented out as a little office?
Basically a WFH environment except it's not home. I've heard of people renting out parking spaces, garages and storage spaces before so perhaps this is a similar situation.
Did you talk to your council?