This is a picture of a boys cottage in Texas. It is at the second facility we worked at and is by far the largest cottage we have lived in. Including the private houseparents’ apartment in the back, relief staff and guest quarters and rooms for 10 boys, I would guess it to be at about 6500 square feet.
I am sure there are larger cottages out there, but I haven’t lived in one larger. If the cottage I worked in now was built like this one, I probably would sell my house.