A simple uniform of Irish blue limestone dresses these four mono-pitched extensions to a rural cottage on the south coast of Ireland by London firm Niall McLaughlin Architects (+ slideshow). More about House at Goleen by Niall McLaughlin Architects
Alison Brooks Architects has extended a nineteenth century house in north London by adding two tapered volumes that project into the garden (+ slideshow). More about Residential Extension by Alison Brooks Architects
This rooftop house extension by Californian architects SFOSL has a metal bridge at its entrance and a facade that folds open. More about 20th Street Residence by SFOSL
Dutch studio BaksvanWengerden has added a splayed concrete extension to a triangular brick house in north Holland (+ slideshow). More about SH House by BaksvanWengerden
A covered courtyard has been inserted into the side of this Kurashiki house by Japanese firm TT Architects (+ slideshow). More about Sunset Villa by TT Architects
A mysterious black gable frames two new bedrooms on the roof of a house in the outskirts of Paris. More about Une Maison sur la Maison by THE Architectes
London architects Liddicoat & Goldhill added an extension to a south London home with an oak-screened staircase and double-height windows. More about The Orangery by Liddicoat & Goldhill
Austrian architects Atelier Thomas Pucher built a glass box and courtyard onto this house in Graz to bring the family's living space outdoors (+ slideshow). More about Villa SK by Atelier Thomas Pucher
A chunky bay window protrudes from this timber-clad addition to a house in Ontario by Canadian studio The Practice of Everyday Design (+ slideshow). More about Eden House by The Practice of Everyday Design
Belgian studio EXAR Architecture have replaced walls of brick and plaster with glass and Corten steel on this extension to a suburban house outside Brussels. More about Campanules by EXAR Architecture
Slovenian studio OFIS Arhitekti have added a bleached larch extension onto the side of a 1930s house in Ljubljana designed by modernist architect Josip Costaperaria. More about Villa T-Extension by OFIS Arhitekti
Designed in Hackney: it's week four in our celebration of design from the London borough of Hackney and today's featured project is a modest glass extension to a house in Dalston by Shoreditch-based architects Platform 5. More about Designed in Hackney: Mapledene Road by Platform 5 Architects
Slideshow: the faceted copper envelope of this house extension near Sydney was designed by architects Innovarchi to resemble a roof. More about Balmain Archive by Innovarchi
A 1960’s bungalow in Cambridgeshire is hidden behind a Siberian larch-clad extension with a row of gabled roofs. More about The Lanes by Mole Architects
English architects Designscape have reversed the orientation of a country house in Bath by adding a prominent glazed entrance to its rear. More about The Fosse by Designscape Architects
A single-storey studio at the bottom of the garden of a semi-detached house in London creates a separation between work and domestic life for its residents. More about Suburban Studio by Ashton Porter Architects
London architects Gundry & Ducker have added a blackened larch extension onto the rear of a Victorian terrace in south London. More about Dove House by Gundry & Ducker
Climbing plants grow in the recesses of this mysterious steel fence, which conceals the entrance to a renovated coach house in north London. More about Murray Mews by Moxon Architects
A frameless sheet of glass undulates around this barrel-vaulted conservatory in west London. More about The Glass Wave by Andy Martin Associates
One half of an extension to a house in north London is surrounded by frameless glass, whilst the other half is encased in slatted timber. More about Duncan Terrace by DOSarchitects