In Pictures: A tour of the seven projects shortlisted for this year's RIBA House of the Year, as showcased on Channel 4's Grand Designs - including the Winner, House Lessans in Northern Ireland
RIBA has picked the 20 best new homes and home-extensions in Britain, including a house on stilts, a converted water tower, a modern take on a Kent oast house, and some remarkable heritage reinterpretations.