A sunken bicycle workshop sits at the end of a classical-style walled garden at this extension to a townhouse in Ghent, completed by Belgian practice Graux & Baeyens Architecten. More about Graux & Baeyens adds prefabricated-steel extension to Ghent townhouse
Architects Ana Nuño de Buen and Luis Young have used a green metallic frame to form the structure of an airy apartment built atop an existing building in Mexico City. More about Glass and steel form rooftop Cascada House apartment in Mexico City
Argentinian office Set Ideas has added a glass-and-steel extension to a house in the mountains of Córdoba, using a modular structure to enlarge the resident's living spaces. More about Set Ideas extends Fluid House in Argentina using glass and steel
Continuing our review of the year we look at the house extensions that turned heads in 2021, including a polycarbonate-clad tower and a mirrored art gallery on stilts. More about Dezeen's top 10 house extensions of 2021
Delve Architects has transformed a 19th-century haybarn in Surrey into a family home, revealing the original stone structure and complementing it with two cedar shingle-clad extensions. More about Delve Architects strips back and extends 19th-century stone barn in Surrey
London studio ROAR Architects has converted and extended an end-of-terrace home in Kentish Town into two self-contained apartments for a brother and sister, with contrasting interiors designed to capture each of their personalities. More about ROAR converts London end-of-terrace into a duo of colourful duplexes
Oxford-based practice Gresford Architects has used a stepped stack of charred-timber-clad forms to extend a Victorian terrace in Walthamstow, London. More about Gresford Architects adds charred-timber extension to London terrace
French studio Java Architecture has renovated and extended a ruined stone house in Paris with a wooden tower that is clad in polycarbonate panels. More about Java Architecture extends Parisian home with polycarbonate-clad tower
Tigg Coll Architects has added a timber-roofed wing to a house in Surrey, England, to support the needs of two children with a rare muscular disorder. More about Tigg Coll Architects remodels Surrey home for children with limited mobility
Pale timber ribs characterise the interior of this white-brick extension, which local studio Amos Goldreich Architecture has added to the rear of a north London home. More about Amos Goldreich Architecture adds timber-framed extension to Framework House in London
A scalloped metal roof and brightly coloured accents feature in a renovation and extension of a 1960s home in Melbourne by local architecture studio Wowowa, which has been shortlisted in the residential rebirth category of Dezeen Awards 2021. More about Wowowa uses colourful accents to update 60s home in Melbourne
Australian practice Matt Gibson Architecture + Design has restored and extended a historic home in the suburbs of Melbourne, which has been shortlisted in the residential rebirth category of Dezeen Awards 2021. More about Matt Gibson transforms Melbourne home with courtyards and glazed bridge
Architecture office VATRAA has reused bricks salvaged from the demolition of an existing sidewall to construct this extension to a Victorian house in north London. More about VATRAA adds brick-clad gabled extension to Victorian house in Camden
Everything is pale pink in this monochromatic loft extension designed by Emil Eve Architects for a house in east London. More about Emil Eve Architects creates "sense of calm" in pale pink loft extension
A double-height living area crossed by a small wooden bridge sits at the centre of this home in Girona, Spain, renovated and extended by SAU Taller d'Arquitectura. More about SAU Taller d'Arquitectura opens up narrow interior during Spanish home renovation
Architecture office Resell+Nicca has added an extension to a semi-detached house in Oslo comprising a tower linked to existing living spaces by a glazed bridge. More about Resell+Nicca's Tower Bridge extension contains dining room that straddles a car port
A quaint dwelling that was once a houseboat has been renovated and enlarged by US firm Best Practice Architecture for a couple and their daughter. More about Best Practice Architecture updates historic Boathouse Bungalow in Seattle
Architecture studio Reddymade has collaborated with Chinese artist and activist Ai Weiwei to design a corrugated metal extension with hexagonal ends for a weekend home in Salt Point, New York. More about Reddymade and Ai Weiwei add hexagonal extension to Salt Point home
Jonathan Tuckey Design has renovated a historic house in Cornwall, England, adding a stone-clad extension that contrasts with the original lime-rendered building. More about Jonathan Tuckey Design adds modern extension to traditional Cornish house
Will Gamble Architects has renovated and extended a Victorian house in south London, with details including casement-style glazing, skylights and a big pivoting door. More about Will Gamble Architects puts modern spin on Victorian details with T-House in London