Knightsbridge House is a Grade II listed Georgian townhouse close to Hyde Park, within the Knightsbridge conservation area of Westminster. Our task was to work with the existing context and original building whilst updating the house to suit contemporary family life and tastes, accommodating 4 bedrooms and 3 bathrooms. Stripping out the dated décor and removing the non-original conservatory allowed us to make a key intervention in the form of a new copper-clad rear extension in juxtaposition with the London stock brick rear facade. The extension utilises the existing levels of the site to give a flowing open plan arrangement between the rear garden, new kitchen and adjoining casual living spaces, in contrast with and complementing the original Georgian layout of the main house.