A new, light and spacious, single-storey rear extension to a family house in Surbiton. The extension contains a living room and a kitchen-diner. The space has been carefully designed for its future function with a creation of a bespoke bench for the dining table and use of wet underfloor heating, which allowed for an open plan space without having traditional radiators. The extension has a flat roof, covered with white pebbles, and two roof lights. The space benefits from lots of light thanks to tall glass panels on both sides. Just behind the aluminium, double glazed, sliding doors, there is an outside entertainment and dining area.