House of Four Ecologies
A coastal retreat located at The Sea Ranch, California, reactivates the community’s experimental origins. House of Four Ecologies gathers six owners into a finely tuned timber sanctuary organised around four ecologies: ocean, garden, grove and meadow.
In the 1960s, landscape architect and designer Lawrence Halprin designed The Sea Ranch as an experiment in radical living – a coastal neighbourhood where communal ideals and ecological stewardship could flourish. Decades later, that utopian vision has largely surrendered to luxury vacation homes. House of Four Ecologies represents something different: a reclamation of The Sea Ranch’s founding principles through shared ownership – six people co-stewarding four ecologies on the Pacific Coast.
Designed by four friends – architect James Leng, development director Natasha Sadikin, Carnegie Mellon professor Juney Lee and HoK principal Hoang Nguyen – the 148-square-metre residence is co-owned by six people, each with fractional access to a sanctuary that would otherwise be beyond reach.
Clad in black-stained, rough-sawn Douglas fir plywood panels, the house appears to snake through the landscape: a low-slung composition of four interconnected volumes nestled against a riparian corridor studded with aged firs. Its siting draws on Halprin’s sectional sketch depicting a sequence of ecologies traveling from the Pacific Ocean – from the headlands to the meadow, to the woodland ridge and then down to the Gualala River. Inside, the Ocean Room wraps its inhabitants in a built-in banquette and opens west to coastal views, where ocean haze softens the daylight. The Garden Room acts as a threshold between inside and out – a walled courtyard bounded by sliding doors that dissolve the house into the landscape. At the centre, the kitchen anchors the plan as a communal hearth; it is the largest open area where light slips through awning windows and lingers into late afternoon. Off the courtyard, the studio pavilion faces the meadow’s dusk glow – a room for solitude and creative work as evening gathers. To move through the house is to experience the day itself: morning on the ocean, noon in the sheltered courtyard, dusk in the meadow.
Yet the house’s significance extends beyond its striking form. It addresses a tension identified by Sadikin: “While one of The Sea Ranch’s original ambitions was to be a place of radical experimentation, in some ways it has become another luxury vacation home destination.” Rather than abandon architectural beauty to economic exclusion, the designers propose co-ownership and co-housing as the ‘next experiment’. This approach doesn’t trade quality or environmental stewardship for accessibility; instead, it argues that they’re inseparable. Shared ownership becomes a pragmatic radicalism that acknowledges the inflated cost of coastal living while refusing to dim the project’s design ambition.
For James Leng, the project marks the launch of his new practice, Glacial Erratic – a name borrowed from geology to describe a rock carried far from its source and deposited by ancient ice. Like those stones, the motivations of coastal construction shift across generations, transforming as they settle into new terrain. At The Sea Ranch, Leng and his collaborators are attempting exactly that: carrying Halprin’s vision forward, not through nostalgia but through reinvention.
