Self-Built Treehouse Writing Studio Nestles Among Swiss Valley Oaks - Yanko Design

"Perched among the towering oaks of Switzerland's Onsernone Valley, the Casetta Tessino emerges as an unconventional solution to a common problem. When a Swiss artist and climate activist sought additional living space on their property, local building regulations stood firmly in the way. Traditional extensions were off the table. Foundation work was forbidden. What remained was the possibility of building upward, anchored not to earth but to the forest itself."

"Architect Olin Petzold embraced the constraints. The resulting structure balances on three trees, its triangular form rising from the woodland floor like a geometric bird's nest. Wood and translucent polycarbonate panels wrap the exterior, filtering dappled light into the compact interior. Located roughly 150 meters from the main house, the treehouse functions as a writing studio, guest room, and personal retreat."

Casetta Tessino perches among oaks in Switzerland's Onsernone Valley and provides additional living and working space without ground-based foundations. Local regulations forbade traditional extensions and foundation work, so the structure is anchored to three trees, rising as a triangular form above the woodland floor. Wood and translucent polycarbonate panels wrap the exterior, filtering dappled light into a compact interior located roughly 150 meters from the main house. The building functions as a writing studio, guest room, and personal retreat. The design references Henry David Thoreau's Walden, favoring simple living and immersion in nature, and components were sized for manual transport so the client could complete a self-build.

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