The windows of this extension to a 1920s bungalow in Tasmania sit within faceted timber reveals, contrasting with the white-painted weatherboard walls (+ slideshow). More about Tasmanian house extension by Preston Lane features faceted wooden window recesses
A glossy black marble wall divides the glass facade of this extension to a 19th-century townhouse in north London by local architecture office Paul Archer Design (+ slideshow). More about Paul Archer Design pairs glass with marble for extension to a remodelled London townhouse
Square windows and a matching door puncture the dark brick facade of this extension to a 1920s house in a Sydney suburb, designed by local office Tribe Studio (+ slideshow). More about Tribe Studio adds contemporary brick extension to a 1920s Sydney bungalow
This glass-fronted living room and surrounding garden have been added by New South Wales firm CO-AP on the rooftop of a house in Sydney's Darlinghurst (+ slideshow). More about CO-AP creates rooftop oasis for residents of a Sydney penthouse
The walls of this extension to a house in Melbourne feature a mismatched pattern of bricks and roof slates, sourced when part of the original building was demolished (+ slideshow). More about Bricks, doors and roof tiles recycled by Phooey Architects for Melbourne house extension
Walls of frameless glazing offer uninterrupted views of the Golden Gate Bridge and San Francisco Bay from this 1970s California house, which has been reworked and extended by local studio Swatt Miers Architects (+ slideshow). More about California home by Swatt Miers Architects faces out over San Francisco Bay
This Vietnam house extension cantilevers off the edge of a stone plinth, protecting the rooms inside from annual flooding (+ slideshow). More about Nha4 Architects adds flood-proof extension to family home in Vietnam
Dutch studio Bloot Architecture has added a larch-clad roof extension to a 1950s summer house, featuring a glazed wall angled to frame views of the trees overhead (+ slideshow). More about Woodland holiday home updated with rooftop extension facing up to the treetops
This Victorian-era villa in Sydney has been renovated and extended to meet the needs of a family with an extensive art collection, while a concrete plunge pool caters for its grown-up children (+ slideshow). More about Smart Design Studio adds concrete extension and pool to dilapidated Sydney villa
Marlene Uldschmidt's extension to an old farmhouse in Portugal's Algarve region features windows that cover entire walls and a paved rooftop promenade that affords views of the rural landscape (+ slideshow). More about Walkway extends over rooftop of Algarve farmhouse extension by Marlene Uldschmidt
Australian architect Matt Gibson took cues from the designs of European Modernists for this pair of extensions he has added to the rear of a Victorian-era residence in Melbourne (+ slideshow). More about Matt Gibson adds Modernist-inspired extension to a Victorian home in Melbourne
Australian firm Cox Architecture has extended a house in the capital city, Canberra, with a lightweight glass and steel conservatory (+ slideshow). More about Cox Architecture adds steel and glass conservatory to 1920s house in Canberra
This white concrete extension has been added to the roof of an old apartment block in the Austrian city of Innsbruck, providing extra rooms and a roof terrace with panoramic views (+ slideshow). More about Daniel Fügenschuh adds white concrete loft to a 20th-century apartment block in Austria
This glazed house-shaped gallery sits within an old barn in a English village without appearing to touch the floor, the thick stone walls or the timber-truss roof (+ slideshow). More about Private art gallery by Stonewood Design cantilevers into a 17th-century Cotswolds barn
This artists' home in Dalston has been updated with a yellow-framed kitchen extension in the back garden and a traditional glass and timber "shopfront". More about PriceGore adds a yellow-framed extension to an east-London artist's home
The two elongated wings that make up this extension to an Australian farmhouse are set into the side of a hill, connected by a stairwell that offer views straight through its middle (+ slideshow). More about Honeyman + Smith Architects adds a hillside-hugging extension to an Australian farmhouse
This collection of angular asphalt-clad roof extensions provide elevated sleeping platforms, a study and a pair of funnel-shaped skylights for a home in eastern Denmark. More about Asphalt-clad roof pods by Leth & Gori create new rooms on top of a Danish bungalow
A concrete floor merges with seating inside and outside this rusted steel and glass extension to a Victorian-style house in west London, designed by local architecture studio McLaren Excell (+ slideshow). More about McLaren Excell adds a weathered-steel and concrete extension to a London house
Strips of black-stained timber give a charred appearance to this extension to a north-west London flat, designed by Fraher Architects to create a bigger kitchen for a client who loves to cook (+ slideshow). More about Blackened timber extension by Fraher Architects provides a new kitchen for a keen cook
Architecture studio Cadaval & Solà-Morales has transformed a traditional white brick house in Mexico City into an apartment complex, with the addition of a row of black penthouses (+ slideshow). More about Cadaval & Solà-Morales installs angular black penthouses during renovation of a 1920s building