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Cocoon Enclosure with Norway Spruce Emphasizing Natural Balance in a Forest Retreat

Authors:
Isamu Kanda, Sangsuri Chun
Cocoon Enclosure with Norway Spruce Emphasizing Natural Balance in a Forest Retreat
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A cocoon enclosure crafted from Norway Spruce rises above the forest floor, offering a tranquil retreat designed for meditation and introspection while emphasizing a deep connection with nature.
5 key facts about this project
01
Cocoon-like enclosure enhances privacy while connecting to the forest.
02
Spiral staircase integrates with the structure's upward flow.
03
Circular skylight fosters a unique relationship with the tree canopy.
04
Norway Spruce chosen for local sustainability and lightweight properties.
05
Elevated platform design minimizes ecological impact on the surrounding area.

The Tree House is a design that integrates structure and nature, creating a space for contemplation and reflection in a forested environment. It focuses on promoting mindfulness and calm, drawing inspiration from the principles of yoga, particularly the benefits of twisting for maintaining balance. The design allows users to connect deeply with the natural surroundings, offering an opportunity for peace and escape from everyday life.

Conceptual Framework
The design emphasizes simplicity and natural harmony. It provides a setting that encourages self-examination and growth. The tree house has a slender stem that broadens at the top, resembling the growth of trees. As occupants climb the spiral staircase, they reach a hidden room that serves as a retreat. This space filters visual distractions, allowing the sounds and scents of the forest to guide the experience.

Spatial Configuration
The elevated platform is a key feature, surrounded by a protective cocoon-like structure. This design enhances privacy while inviting interaction with the natural landscape. Below the platform, essential items such as water and food can be stored, thus keeping the space open for users to fully engage with their surroundings. A distinctive circular skylight lets in light, fostering an awareness of the tree canopy overhead.

Material and Assembly
The tree house makes use of Norway Spruce, chosen for its local availability and sustainability. The assembly method involves stacking square frames arranged in a pinwheel pattern, which supports the structure's strength and allows for the spiral staircase. Stability is achieved through the use of tie-downs, which minimize the footprint of the design. This approach enables building on uneven ground without disrupting the existing ecosystem.

A suspended fireplace is located in the upper area, providing warmth and light. It enhances both the practical function and aesthetic quality of the tree house. As natural light filters down through the skylight, the design invites occupants to immerse themselves in the forest environment. This creates a serene atmosphere that fosters a sense of connection with nature and encourages moments of quiet reflection.

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The Buildner’s Unbuilt Award 2025: Celebrating Architectural Creativity and Visionary Unbuilt Designs with a Total Prize Fund of €100,000

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The Buildner’s Unbuilt Award 2025 is an international architecture competition dedicated to recognizing and celebrating the value of unrealized architectural designs. It invites architects, designers, and students worldwide to submit visionary projects that have not yet been constructed, highlighting the power of ideas and the creativity behind the design process. By focusing on unbuilt work, the competition aims to bring forward concepts that shape the future of architecture and push the boundaries of the profession. 

Participants can compete in three categories based on project scale: Small Wonders (up to 100 m²), Medium Marvels (101–999 m²), and Large Visions (over 1,000 m²). Each category winner will receive €20,000, and additional prizes include honorable mentions, student awards, and a special Best Presentation Award. Winning projects will gain significant international exposure through Buildner’s publicity campaign and a feature article on ArchDaily, providing a unique opportunity to showcase creative ideas to a global audience. 

The Buildner’s Unbuilt Award 2025 encourages entrants to submit any type of unbuilt project, from conceptual visions to detailed designs, celebrating bold innovation without the constraints of realization. Important deadlines: registration closes on October 30, 2025; submissions are due by November 20, 2025; winners will be announced on December 17, 2025.

Buildner's Unbuilt Award 2025

Celebrating your unbuilt architecture visions with a €100,000 prize

100,000€ Prize / 2025 ideas COMPETITION
Prize 100,000 €
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Final registration deadline 30 October 2025

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