richardhomeowner

i have just become a member, so hopefully its ok to jump on the end of an old post. i had an extension done 10yrs ago and seem to remember the architect saying something about maximum window size of 1 sq mtr. there used to be a bungalow next door, which has since had building work done to make into house. so i have a detached house with a side wall 850mm from the boundary fence. nieghbour is also similiar distance from boundary. on this side wall i have a dining room window downstairs and a bathroom window upstairs. the room next to the bathroom is a bedroom with an ensuite, that doesnt have a window. ( their is a brick wall between the bathroom and bedroom ensuite i want to create a new window opening 1200 x 600 for the ensuite ( less than 1m2 ) but looking at the building regs document diagram 20 space seperation, which shows distance between windows, im not sure if im allowed. the old drawing BR 2013 used to have measurements between windows on the same level. the newer BR 2019 drawing doesnt 1) am i right in thinking that if the bathroom and bedroom/ensuite is divided by a brick wall, that is classed as a different compartment and their is no min distance between windows ? 2) i can have a window less than 1m2 obscured glass and it doesnt have to be a special fire rated window. 3) can the window have a small top opening window 4) do i need building regs officer to inspect this, if i do it myself or get a registered dbl glazing company to install ? many thanks for any help