
I just had a cloakroom built and January and my builder told me the same thing JG. Maybe it depends on where you live? or he's out of date.
Anyway, I had a very small space under the stairs that used to be the entrance to the kitchen. I walled that off on the kitchen side and it's surprisingly spacious in there. I thought it would feel small but it feels quite large with the vaulted ceiling. It's only 3 feet wide and the total floor area is about 6.5 m2. It would have been easier to section off the kitchen but thought who would want to listen to someone in the toilet while cooking and what guest would want to use it while people were in the kitchen. I think anything off a hall is much better for privacy. Not to mention I really wouldn't want a toilet in my kitchen.