Deca Architecture's London apartment merges playfulness and connectivity
An abstract feature staircase at the heart of a London apartment brings fun to a residential redesign by Athens-based practice Deca Architecture, while cleverly uniting private and communal spaces

A wide timber slide with a built in staircase connects the floors of this unconventional, two-bedroom apartment in London designed by Greek practice Deca Architecture.
Designed for a long-time client and friend of the practice, the 140 sq m home is spread across the first and second floors of an Edwardian London terrace house in Chelsea. Formerly two separate flats, the new larger apartment is an imaginative amalgamation of the two, executed in a tactile material palette of aged oak, metal and marbles.
Most notably, Deca decided to buck the tradition of placing social spaces on the lower floor and private spaces on the upper. Instead the studio created a layout that blends the two across both floors.
‘A lot of London conversions are very formulaic, so we asked ourselves: how do we break this paradigm while creating something totally unique for our client?' explains Carlos Loperena, who founded DECA alongside Alexandros Vaitsos.
The main bedroom with its unusual octagonal plan, is positioned on the second floor at the front of the apartment above the living room. Meanwhile the guest bedroom and bathroom are tucked away under the dining and kitchen areas at the rear.
The wedge-shaped, oak-lined slide that connects the living room and the dining area serves as a carefully-scaled spatial tool, allowing light to filter through to the lower floor while also concealing the apartment's utilities and a WC.
‘The idea was to maximise the light and enhance the connection between the front and back of the apartment in all of the primary spaces,' said Loperena. ‘To have so much light within an apartment in London is quite extraordinary.'
The firm’s desire to balance quality of light with smooth circulation is also apparent in the use of an interior sash window in the main bedroom – it allows the room to benefit from both the morning and the evening light while maximising on space.
For Deca Architecture, the creation of a total experience is the most crucial part of the project, says Loperena: ‘The strength of these subversive elements lie in their ability to create both a sense of familiarity and surprise.'
INFORMATION
Wallpaper* Newsletter
Receive our daily digest of inspiration, escapism and design stories from around the world direct to your inbox.
Ali Morris is a UK-based editor, writer and creative consultant specialising in design, interiors and architecture. In her 16 years as a design writer, Ali has travelled the world, crafting articles about creative projects, products, places and people for titles such as Dezeen, Wallpaper* and Kinfolk.
-
Vestre’s neo-brutalist furniture will bring ‘a little madness’ to Paris Fashion Week
Bound for Paris Men’s Fashion Week this month, Norwegian furniture brand Vestre reveals a sculptural bench and mirror created with designer Vincent Laine and fashion creative Willy Cartier – the latest outcome of its risk-taking ‘a little madness’ initiative
-
For its latest runway show, Zegna creates a serene oasis in Dubai
The Italian fashion house took over the Dubai Opera for a S/S 2026 show that proposed a lived-in elegance, drawing inspiration from Dubai’s sunbaked landscapes and Zegna’s birthplace of Trivero
-
Time-travel to the golden age of the cruise ship at Sea Containers London
The South Bank hotel celebrates its tenth anniversary with four new suites inspired by period cabin design, from Edwardian elegance to 1980s glamour
-
Lego and Serpentine celebrate World Play Day with a new pavilion
Lego and Serpentine have just unveiled their Play Pavilion; a colourful new structure in Kensington Gardens in London and a gesture that celebrates World Play Day (11 June)
-
Inside Abbey Road's refresh: touring the legendary studio's new interior
Abbey Road gets an interior refresh by Threefold Architects, bringing the legendary London recording studio in tune with the 21st century
-
The Serpentine Pavilion 2025 is ready to visit, ‘an exhibition you can use’
The Serpentine Pavilion 2025 is ready for its public opening on 6 June; we toured the structure and spoke to its architect, Marina Tabassum
-
A meticulously crafted artist’s space in east London evokes the area’s long creative history
Maich Swift Architects’ artist’s space has radically reconfigured a Victorian terraced house, transforming it into a contemporary live/work interior
-
Welcome to Omved Gardens, north London’s hidden green oasis
This secret space in Highgate is relaunching as a vibrant community hub with new spaces, activities and exhibitions
-
This contemporary cabin cantilevers over a Scottish loch
Rock Cove, Cameron Webster Architects’ contemporary cabin in Argyll, Scotland, makes the most of its wild setting
-
Innovative coastal garden turns heads at this year’s RHS Chelsea Flower Show
Landscape Designer Nigel Dunnett’s ‘Hospitalfield Arts Garden’ at Chelsea Flower Show 2025 has been making waves with its progressive approach to sustainable landscape and planting design
-
What to see at the London Festival of Architecture 2025
June is all about the London Festival of Architecture 2025; we browsed the over 450-event rich programme for its highlights, so you won't have to