This narrow home in San Francisco is a modern take on treehouse living
In San Francisco, a narrow home by Dumican Mosey Architects, Dolores Heights House, is a demonstration of how to make the most of an awkward plot, creating an expansive home overlooking the trees

A narrow home showcases expansive potential among San Francisco's steep hills and colourful slanted houses. For architects, small plots can be difficult to navigate, especially in the dense, urban heart of a city. However, Dumican Mosey Architects has transformed one awkward site by working within smaller square footage for this narrow house project - Dolores Heights House, sat branching out behind the trees.
Dolores Heights House: an ingenious narrow home by Dumican Mosey Arhitects
The San Francisco-based studio began working on the project for a developer. The resulting house was bought by a couple with two young children, upon completion. The new clients were happy with the original design but continued to work closely with the firm to tailor details to their preferences, which included materials and finishes.
The transition of ownership was not seen as a hindrance to Dumican Mosey Architects, but rather a valuable opportunity to apply an intricate level of detailing into the residence and elevate the project to create an ideal custom home.
The contemporary residence comprises several cubic volumes, stacked on top of each other on a steeply sloped site. This geometric nature plays with depth and transparency through its materiality of glass, stone and steel. The front façade of the home further plays with transparency, allowing for openness yet balancing privacy for the client.
The rear façade is much more open and glass is at the core allowing for light to flow through the building. These large glass panels frame the anchor of the home, a large healthy tree which stands tall in the backyard and is carefully preserved.
The home’s interior layout is defined by the triple-height atrium at the core. Its placement, spanning the front and back of the house, allows for the gaze to be taken through the space, while also adding a sense of space throughout. A folded steel staircase adds to the visual interest, contrasting with the floor-to-ceiling wood slat wall behind it.
A skylight above welcomes in natural light that brightens the home while making shadows dance around the interior throughout the day. This openness and integration of the skies above breaks down a barrier between indoor and outdoor living.
Receive our daily digest of inspiration, escapism and design stories from around the world direct to your inbox.
The living room is located on the second floor and spills out to a decked terrace outside which overlooks the tree. A wide steel-framed glass sliding door opens to views of downtown. The wide-plank oak flooring allows for the house to serve as a very sophisticated treehouse, a playfully fun and nostalgic touch to contemporary living.
Tianna Williams is Wallpaper’s staff writer. When she isn’t writing extensively across varying content pillars, ranging from design and architecture to travel and art, she also helps put together the daily newsletter. She enjoys speaking to emerging artists, designers and architects, writing about gorgeously designed houses and restaurants, and day-dreaming about her next travel destination.
-
A carbon-emission-busting house, yeast-biomass building, and more ‘Designs for a Cooler Planet’
‘Designs for a Cooler Planet’ returns to Aalto University in Finland as part of the annual Helsinki design and architecture week, highlighting buildings, materials and solutions towards a better future
-
You can safely sit on Max Lamb’s ceramic chairs for 1882 Ltd
A new collaboration pushes the boundaries of design and ceramic manufacturing: ‘Crockery’ is on view at Gallery Fumi until 30 September 2025
-
Material Matters: Grant Gibson reflects on his popular design fair, about to open at LDF 2025
As Material Matters returns to London Design Festival from 17-21 September, we catch up with founder Grant Gibson to learn more about crucial material conversations in contemporary design
-
Herzog & de Meuron and Piet Oudolf unveil Calder Gardens in Philadelphia
The new cultural landmark presents Alexander Calder’s work in dialogue with nature and architecture, alongside the release of Jacques Herzog’s 'Sketches & Notes'. Ellie Stathaki interviews Herzog about the project.
-
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
-
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