Hello my sister's brother uncle's father in law's cousin's friend is asking for advice about doing her loft conversion in a 1930/40s terraced flat block of 8. 1up 1 down style four on one side 4 next door all 8 share the same roof, with partition wall separating the top four roof spaces. would this type of build still be allowed? It would be on the back of the roof so would not be seen from the road side. There are other dormer style loft rooms a few streets away in taller tenement blocks but these were done decades ago before planning was a thing maybe. Who would be the first point of contact to see if this is feasible? thanks.