Made for multigenerational living on the beautiful Hebridean island of Tiree, House No 7 is a cluster of familiar forms that aren’t really architecture at all, an agricultural family grown from the machair. The three parts – a traditional wide-walled cottage for sleeping, a corrugated steel-clad barn for living and a functional utility shed containing much-needed welly storage – huddle around a sheltered central hall, their strong exteriors facing the wind to protect a softer interior.