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Organic Retreat with CNC-Milled Pine and Semi-Transparent Panels

Authors:
Kristina Masyte, Diana Georgiana Tofan
Organic Retreat with CNC-Milled Pine and Semi-Transparent Panels
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Constructed with CNC-milled pine and complemented by semi-transparent panels, the cabin offers a tranquil retreat that emphasizes a deep connection to nature while promoting well-being in an urban environment.
5 key facts about this project
01
Constructed using CNC-milled raw pine, enhancing both texture and acoustic qualities.
02
Incorporates semi-transparent PVC panels to create a dynamic interplay of light and shadow.
03
The design emphasizes organic shapes, moving away from traditional orthogonal forms.
04
Features a central skylight that directs attention to the sky and minimizes urban distractions.
05
Facilitates a direct connection to nature, promoting mental well-being in a busy city environment.

The Hollow Tree Cabin serves as a thoughtful addition to the urban landscape of Tokyo, aiming to create a space that reconnects individuals with nature. Designed to be a retreat from the fast pace of city life, the cabin emphasizes tranquility and reflection. Its design focuses on organic forms that contrast with the traditional linear structures found in the surrounding area, promoting a sense of harmony with the environment.

Spatial Dynamics

The architectural design features a shift from straight lines to smooth, flowing shapes. This change encourages a connection with the natural surroundings while providing a range of spatial experiences. The layout allows for interactions with light and shadow that enhance the ambiance inside. As one moves through the cabin, the changing shapes create unique experiences in each space.

Materiality

CNC-milled panels made from raw pine timber are central to the structure, providing warmth and comfort. These materials are known for their positive effects on well-being, such as reducing stress and promoting relaxation. Meanwhile, semi-transparent PVC panels invite curiosity. They offer glimpses of the wooden interior while maintaining a connection with the outside environment.

Light and Shadow

A significant feature of the cabin is the skylight, which brings natural light into the interior. This design element pulls the eye upward and creates views of the sky, helping to lessen distractions from the urban surroundings. Light filters through the spaces, resulting in an ever-changing play of shadow and brightness that shifts throughout the day.

Interior Experience

Inside, the layout emphasizes a rise in energy and flow. The vertical orientation invites exploration and cultivates a sense of calm. Smooth transitions between different areas allow for a consistent connection with nature. The raw pine timber enriches the environment, while the semi-transparent panels filter in light, creating soft patterns on the walls that change as the sun moves across the sky.

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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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Competition organisers

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 €
Eligibility Open to all
Final registration deadline 30 October 2025

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