We currently have a 3 bed semi (2 double rooms and a box room) and have just been granted planning permission to put 2 bedrooms and a kitchen/diner on the side :)
The box room is currently DH's study/office and I was quite adamant that we didn't want a connecting door knocking through between his study and our new bedroom for DH's sleep hygiene. He has now pointed out that the boxroom could become a walk-in wardrobe/dressing room as part of a 'master suite' if we were prepared to sacrifice the 5th bedroom. He says he would be happy to have a sofa bed in one of the double rooms as a combined guest room/office.
Plans here if that makes it easier.
Which would you prefer?