Explore this California guesthouse of stripped-back essentials and elevated comfort
Crest ADU is a minimalist California guesthouse by Mork-Ulnes Architects, slotting into Marin County’s leafy hills with pared-down charm

What used to be an old garage is now a minimalist California guesthouse, courtesy of the San Francisco- and Oslo-based architecture studio of Casper Mork-Ulnes. Built on the footprint and foundation of its previous incarnation, Crest is a new Accessory Dwelling Unit (ADU) set on a leafy hillside of Marin County. The result? A compact home that elevates the experience of being in a pared-down vacation cabin through design.
Tour Crest: a new California guesthouse
Mork-Ulnes and his team worked on the little cabin's volume in a way that maximises views and the sense of space. The guesthouse features a sharply angled roofline that echoes the site's slope. It allows for a high clerestory window above the cabinetry wall, which floods the interior with light.
The structure is clad in cement board outside (used to provide a fire-resistant skin in the densely wooded hillside) and Douglas fir veneer plywood panelling inside. The material selection not only provides a sleek envelope for living, it also allows for ease of maintenance.
The just 38 sq m guesthouse also features a large glazed opening towards the site's long vistas, which draws back to open the interior completely to the outdoors, allowing guests to spill out onto a generous decked terrace overlooking the tree canopy beyond. Living space is maximised in a way that makes the most of California's mild climate and enhances the indoor/outdoor relationship.
A staircase leads up to the bedroom unit, which is located on a mezzanine. Below, a rolling kitchen island can be moved where it's needed – inside or outside. More adaptability is displayed in the murphy bed on the same level, which can be hidden in the wall during the day.
So successful was the design, it's already being used as a family home – albeit temporarily – the architects write: 'The ADU is currently being used by the owners as their vacation cabin while their main house is being renovated.'
Receive our daily digest of inspiration, escapism and design stories from around the world direct to your inbox.
Ellie Stathaki is the Architecture & Environment Director at Wallpaper*. She trained as an architect at the Aristotle University of Thessaloniki in Greece and studied architectural history at the Bartlett in London. Now an established journalist, she has been a member of the Wallpaper* team since 2006, visiting buildings across the globe and interviewing leading architects such as Tadao Ando and Rem Koolhaas. Ellie has also taken part in judging panels, moderated events, curated shows and contributed in books, such as The Contemporary House (Thames & Hudson, 2018), Glenn Sestig Architecture Diary (2020) and House London (2022).
-
Tour David Lynch's house as it hits the market
David Lynch's LA estate is for sale at $15m, and the listing pictures offer a glimpse into the late filmmaker's aesthetic and creative universe
-
A new Tadao Ando monograph unveils the creative process guiding the architect's practice
New monograph ‘Tadao Ando. Sketches, Drawings, and Architecture’ by Taschen charts decades of creative work by the Japanese modernist master
-
Inside the sculptural and sensual philosophy of jewellery house Renisis
Sardwell, founder of jewellery house Renisis, draws on sculpture, travel and theatre to create pieces that fuse sensual form with spiritual resonance
-
Meet Studio Zewde, the Harlem practice that's creating landscapes 'rooted in cultural narratives, ecology and memory'
Ahead of a string of prestigious project openings, we check in with firm founder Sara Zewde
-
The best of California desert architecture, from midcentury gems to mirrored dwellings
While architecture has long employed strategies to cool buildings in arid environments, California desert architecture developed its own distinct identity –giving rise, notably, to a wave of iconic midcentury designs
-
A restored Eichler home is a peerless piece of West Coast midcentury modernism
We explore an Eichler home, and Californian developer Joseph Eichler’s legacy of design, as a fine example of his progressive house-building programme hits the market
-
How LA's Terremoto brings 'historic architecture into its next era through revitalising the landscapes around them'
Terremoto, the Los Angeles and San Francisco collective landscape architecture studio, shakes up the industry through openness and design passion
-
This cinematic home in Palm Springs sets a new standard for Desert Modern design
Jill Lewis Architecture and landscape architecture firm Hoerr Schaudt joined forces to envision an exceptional sanctuary
-
Inside a Donald Wexler house so magical, its owner bought it twice
So transfixed was Daniel Patrick Giles, founder of fragrance brand Perfumehead, he's even created a special scent devoted to it
-
The Pagani Residences is the latest ultra-luxe automotive apartment tower to reach Miami
Rising up above Miami, branded apartment buildings are having a renaissance, as everyone from hypercar builders to crystal makers seeks to have a towering structure bearing their name
-
A modern cabin in Minnesota serves as a contemporary creative retreat from the city
Snow Kreilich Architects' modern cabin and studio for an artist on a lakeside plot in Minnesota was designed to spark creativity and provide a refuge from the rat race