The contemporary extension that Kaplan Thompson Architects has added to a traditional home in Maine is linked to the original structure by a bright yellow volume. More about Kaplan Thompson Architects completes angular extension to rural Maine residence
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 about Hayhurst and Co adds charred-timber extension to basement flat in north London
US firm Wittman Estes has added a studio building and a Chinese-inspired courtyard to an existing residence in a dense neighbourhood, aiming to show how to maximise an urban lot. More about Seattle garden studio by Wittman Estes offers model for "courtyard urbanism"
Belgian practice Steven Vandenborre has added this annex to the rear of a family dwelling in Ghent, employing abundant glazing to frame garden scenes. More about Steven Vandenborre creates light-filled extension for Ghent home
A slide and bright yellow ladder are among the playful interventions employed by Alter & Company in its modernisation of a farm in Surrey, England. More about Alter & Company creates playful extension to historic farm cottage
A sliver of glazing separates a white house in Stuttgart from this black extension Holzer Architekten designed to create additional living spaces with plentiful garden views for its owners. More about Holzer Architekten adds black extension to 1920s house in Stuttgart
British architect Guy Hollaway has transformed an 18th-century cottage in the Kent countryside into a modern home featuring a concrete and glass extension. More about Guy Hollaway adds contemporary extension to his quintessential country cottage
William Tozer Associates has completed an extension to a house in Auckland, comprising a series of blocks clad in wooden shingles and vertical boards that enhance the connection with various gardens and decked terraces. More about Gardens and terraces slot around timber-clad extensions to Auckland house
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 about Canal boat interiors inspire space-efficient extension to London house by Archmongers
A vivid orange stairwell and a canted glass facade are among the modifications that US studio Fougeron Architecture has made to a century-old house in San Francisco. More about Fougeron Architecture overhauls Victorian townhouse in San Francisco
This extension to an historic villa in the Swiss town of Arlesheim by Basel-based studio HHF Architects features an expressed steel frame intended to provide a contemporary counterpoint to the house's traditional architecture. More about HHF Architects adds pergola-like extension to traditional Swiss villa
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 about Angular doors connect tapered extension with tiled patio by Mustard Architects
Nick Deaver Architects has added a corrugated metal extension to the rear of a bungalow in Texas, along with a new dining area with floor-to-ceiling windows. More about Nick Deaver enlarges 1930s cottage in Austin with glass and metal additions
Two arches made from handmade bricks form an extension at the rear of this Victorian terraced house in York by London practice Studio Ben Allen. More about Studio Ben Allen adds pair of brick vaults to terraced house in York
Steel frames stand out against the white interior of this extended house in Whistler, where Canadian firm Stark Architecture has also updated the existing residence and clad the whole building in black. More about Stark Architecture overhauls Whistler home with black cladding and monochrome interiors
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 about Sun Rain Rooms named London's best new house extension in Don't Move, Improve! 2018
Oslo-based architecture office Skapa has transformed a tired villa near the Norwegian capital into a contemporary home featuring full-height glazed walls that open up to views of the surrounding trees and seascape. More about Skapa updates prefabricated Norwegian seafront house with glazed walls
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 about Al-Jawad Pike uses pale, exposed materials to extend west London home
Architect Dominic Pandolfini has more than tripled the size of his once run-down home in Melbourne, by adding a contemporary extension clad with zinc. More about Dominic Pandolfini updates his century-old Melbourne home with huge zinc-clad extension
This extension to a house in Taoyuan City, Taiwan, contains independent living spaces for two brothers, which are connected by a glazed corridor that traverses a narrow plant-lined courtyard. More about Glazed extension to Taiwan home by 5X Studio provides views of plants and the sky