Archmongers has turned a section of walled garden in a 1980s house in south London into a living space with sawtooth roof, earning it the dinosaur-inspired name Stego. More
Lofty structures in rural Italy informed the design of this brick house extension that Dominic McKenzie Architects has added to a home in London's Islington. More
A home created within the shell of a derelict chapel has won first prize in a contest to find the best new house extensions in London. More
Clay walls and plenty of built-in storage feature inside this renovated and extended garden flat in northwest London by Rise Design Studio. More
Spray-on rubber originally developed for oil rigs coats this London house extension by Office S&M, which features both round and rectangular windows. More
A loft library, a converted chapel and a Japanese-inspired flat are in the running to be named London's best home-improvement project of 2019. More
Merrett Houmøller Architects has renovated and extended a house in north London using a consistent palette of simple materials and repeated patterns. More
Fraher Architects has refurbished a terraced house in London's King's Cross, adding a rear extension clad in perforated black metal, and a metalwork staircase. More
Architecture office Al-Jawad Pike used pigmented concrete blockwork for the exterior and interior of this two-storey extension to a Victorian house in south London. More
Architecture office Hutch Design has renovated and extended a mews house in north London, incorporating folding walls, mirrors and hidden storage to make the most of the compact space. More
Matheson Whiteley has completed a simple brick extension to designer Sebastian Wrong's east-London house, featuring a combination of traditional and contemporary details. More
Inglis Badrashi Loddo Architects has completed a single-storey extension to a Victorian house in north London, featuring a glazed wall and skylights that allow daylight to flood into a new kitchen and dining space. More
A large porthole-like window punctures the white-brick facade of this extension to a terraced house in north London, designed by Simon Astridge. More
UK architecture office Eckford Chong has renovated and extended an end-of-terrace property in east London, adding a garden studio that evokes traditional Japanese tea houses. More
Optical illusions including a trompe l'oeil painting and mirrored walls alter the perception of space inside this extension to a south London house by architect Sean Griffiths. More
Dark timber cladding applied to the exterior of this extension to a London flat by Hayhurst and Co contrasts the white-oiled boards that line the kitchen and dining space within. More
Archmongers has extended the rear of a terraced house in Stoke Newington that features interiors lined with built-in plywood furniture to maximise the available space and a staircase made from a jigsaw of pieces. More
Mustard Architects has added this extension to an Edwardian house in west London, featuring a tapered plan that expands towards angular glazed doors set into its asymmetric gabled facade. More
A revamped Georgian townhouse with a patio that transforms into a reflecting pool has won top prize in a contest to find the best new house extensions in London. More
Pale brickwork, oak furnishings and terrazzo flooring combine in this light-filled extension to a Victorian house in London's Shepherd's Bush, designed by architecture studio Al-Jawad Pike. More