In this final episode, Kevin McCloud reveals the winner of the most prestigious prize for residential architecture: the Royal Institute of British Architects House of the Year 2017. But first, Kevin, the architect Damion Burrows, and Michelle Ogundehin, editor-at-large of Elle Decoration, sift the final category from the long list, all of them homes that share a pared-back, minimal look. First, on the site of a former caretaker's shed in London, they visit a small but perfectly formed home with oak panelling and sleek polished concrete floors. In Suffolk, a suite of three buildings clad in flint and burned larch, are wrapped around a Persian-inspired courtyard. There's a finely crafted contemporary home packed onto a tiny site in south London; and finally, a luxurious family home, complete with swimming pool, built out of smoked oak and brick.

This time, the shortlist for the Royal Institute of British Architects House of the Year includes a luxurious tree house and a converted 17th century barn in Devon.

This time, five designs with a watery connection, including a glamorous white, curvy, cliff-top home, a cork-clad house on stilts, and a unique home in London, with porthole windows and a gangplank

The Local Materials category include an upscale shepherd's hut, a sleek Modernist house in Bath, and a London townhouse