This extraordinary three-bedroom contemporary house with roof terrace and off-street parking is located on a private cobbled mews in Belsize Park. It is one of a pair of houses developed from an original 1890 stable block by the designer Michael Nathenson. A key feature of the design is the idea of bringing the landscape into the interior, and there is a glazed atrium with mature plants that rise through the space. The house would benefit from some cosmetic updating.