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Twisted Shell Structure Offering Urban Refuge

Author:
Kinga Zajac
Twisted Shell Structure Offering Urban Refuge
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The twisted shell-shaped structure provides a protective urban sanctuary that encourages reflection and social interaction through its unique openwork design and face-to-face seating arrangement.
5 key facts about this project
01
Twisted form mimics deep-sea shell structures.
02
Openwork design allows natural light and views.
03
Diagonal seating enhances face-to-face interaction.
04
Serves as an urban refuge amid Tokyo’s bustle.
05
Encourages moments of reflection and solitude.

The project titled "Shell" is located in Tokyo, a city deeply connected to the sea due to its history as a fishing settlement. The design serves as a protective space for individuals, inspired by the natural armor of deep-sea creatures. The aim is to create a refuge from the busy urban environment while also encouraging interaction with the surroundings.

Concept and Form

The cabin has a twisted shape that resembles a shell. This form is both visually interesting and practical. It offers users a feeling of safety, inviting them to engage in quiet reflection. The design fits well within the natural landscape, echoing the shapes found in nature.



Openwork Design

One of the key features of the cabin is its openwork structure. This allows light to enter while providing separation from the outside crowd. The result is a peaceful environment that encourages introspection. Users can also observe the vibrant world outside, adding to their experience of solitude.



Seating Arrangement

Inside, the seating is arranged diagonally across from each other. This layout promotes direct communication between occupants. In today’s digital age, where face-to-face conversations are reduced, this arrangement fosters deeper connections. It allows people to engage with one another in a quiet, sheltered setting.



Material Considerations

While the presentation does not specify materials, the design suggests the need for lightweight and durable options. Such materials would support the structural goals of the cabin, helping it endure the urban conditions while remaining unobtrusive in the environment.



Natural Integration

The essence of "Shell" is its balance between comfort and a connection to nature. It offers a calm space amidst the lively pace of Tokyo. The interaction of light and shadow through the openwork design enhances the bond between interior and exterior, highlighting how the form engages with the natural world.

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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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