My 8 yo is annoying his older brother (11yo) at bedtime and he's asking for his own space. I had planned on dividing the bedroom into two next year when he'd be going up to highschool. Can't afford it yet.
Plan B is to change the playroom into a bedroom. Big room 8m x 4.5m same size as they currently share. Would you move in yourself and have it as an adult bedroom. Lots of built in storage/shelves. Room for my bed and a wardrobe. DS could have my room, youngest child is 6 so no one needs me in the night generally. Move the 11 yo in he'd be downstairs on his own at night. Generally well behaved but phones get charged in communal areas overnight as he has form for youtubing in the night.
There is a full bathroom downstairs and a woodstove( radiators too so isn't necessary) in the room if that makes a difference.