Designed by Alki Architecture + Design Studio, the Yakisugi Cabin in Wānaka, New Zealand, reverses the conventional process of designing first and specifying materials later. Its architecture developed around materials already available, including salvaged timber windows and doors that determined the proportions and placement of openings. Macrocarpa cypress grown on the architect’s family farm in Southland, in the south of New Zealand’s South Island, was milled for cladding, interior linings, cabinetry, and light fittings. Externally, the timber was hand-charred using the traditional Japanese yakisugi technique to improve its durability.
Reuse is treated as an architectural language rather than concealed. Damaged and reclaimed timber was repaired using kintsugi-inspired techniques, while reclaimed oak flooring, travertine offcuts, and repaired corrugated roofing from an old sheep shed further reduce demand for new materials.
A compact, high-performance envelope
The cabin is constructed using modular StrawSIPs, which combine structure and insulation within an untreated timber system that incorporates carbon-sequestering straw. A highly insulated, airtight envelope works with passive solar gain and balanced mechanical heat-recovery ventilation to maintain stable internal conditions through Wānaka’s alpine winters without a dedicated space-heating system.
Clay plaster contributes to airtightness, thermal mass, and humidity regulation, while seamless tadelakt lime plaster provides the bathroom finish. Space is similarly treated as a limited resource. Integrated joinery allows individual areas to perform several functions: a movable wardrobe opens into a walk-in wardrobe while concealing a Murphy bed, enabling the main room to transition between living and sleeping.
Designed to leave lightly
Built on a leased suburban site, the cabin is elevated on piles and dimensioned for future relocation, reducing the permanence of its intervention in the land. Ishibatate-inspired junctions keep untreated timber away from the ground while limiting disturbance.
The cabin's water and waste strategies extend this approach beyond the building envelope. Greywater irrigates wildflowers, fruit trees, and vegetable gardens, while rainwater is returned to the ground through soak pits constructed from local Clutha River stones. Straw and timber construction offcuts are reused as mulch to improve the soil, with other timber offcuts used to heat an outdoor bath.
