Possible Clues:

• A flat bit on the outside, meant to reshape
• Accommodation for divorced chaps at wit's end
• Separated people need time to find accommodation
• Sounds as if it's not wholly intended, and that's flat
• Meant to change around some rooms
• Not, by the sound of it, wholly intended, and that's flat
• Meant to transform the exterior of some home
• What some families live in
• Not entirely sounded intended, and that's flat!
• Sounds as if that's not wholly intended, and that's flat!