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Spiral Structure Crafted from Maritime Pine and Local Stone Serving as a Community Hub

Authors:
Alanna Signe Green, Edgar Rivera
Spiral Structure Crafted from Maritime Pine and Local Stone Serving as a Community Hub
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A spiral structure constructed of maritime pine and local stone integrates seamlessly into its ecovillage context, serving as a multifunctional community hub that encourages social interaction and sustainability.
5 key facts about this project
01
Spiral form enhances community interaction and connection to nature.
02
Constructed with locally sourced maritime pine and stone for sustainability.
03
Flexible interior spaces adapt to various communal activities and events.
04
Natural ventilation is maximized through strategic window placement.
05
Integration of surrounding gardens promotes biodiversity and outdoor engagement.

Casa de Boas-Vindas serves as a communal architectural hub designed for the Spirala Ecovillage near Lisbon, Portugal. This project emphasizes social interaction and environmental integration through its innovative spiral form. The building's design promotes connectivity and flexibility, allowing for a variety of communal activities, including workshops, events, and communal dining. The architecture illustrates a commitment to sustainability while creating a welcoming space for community engagement.

Architectural Elements and Materiality

The architecture of Casa de Boas-Vindas incorporates a range of local materials to establish a strong connection to its geographical context. Key materials include maritime pine for structural framing, locally sourced stone for external walls, and concrete for foundational stability. Large glass panels are strategically placed to enhance natural lighting and establish a visual connection with the surroundings. Interior wooden finishes contribute to a warm atmosphere, essential for fostering community bonds.

The design features a central courtyard that invites natural interaction, linking various communal spaces. The spiral configuration maximizes occupancy while maintaining an open flow between different areas. This layout permits flexible use of space, adapting to the needs of various community activities. The organic flow of the design encourages visitors to engage freely within the environment, enhancing the overall user experience.

Design Approach and Unique Features

Casa de Boas-Vindas distinguishes itself through its spiral form and multifunctional spaces. The unique geometric design is not only aesthetic; it is a deliberate conceptual choice aimed at fostering social relationships among users. This configuration allows for dynamic interactions, blending functionality with artistic expression.

The architectural design integrates sustainability practices by utilizing local materials and maximizing natural ventilation throughout the building. The high ceilings and open-plan spaces enhance the natural airflow and light penetration, reducing the reliance on artificial lighting and mechanical climate control. This approach underscores the project’s commitment to environmental responsibility, a significant consideration in contemporary architecture.

Integration with Natural Environment

The project exemplifies a strong connection to the local landscape, incorporating outdoor spaces that blend seamlessly with the surrounding environment. Gardens and green areas encircle the building, encouraging outdoor activities and enhancing biodiversity. The architectural design prioritizes the well-being of its users by creating a harmonious environment that draws upon natural elements, ensuring users feel connected to the natural world.

For detailed insights into the architectural plans, sections, and designs of Casa de Boas-Vindas, readers are encouraged to explore the project presentation. Engaging with these materials provides a comprehensive understanding of the architectural ideas that shaped this community-centric project.

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The Next House: USA — A Global Call to Reimagine the American Suburb

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Buildner is launching The Next House: USA, a global architecture competition that challenges architects, designers, and thinkers to reimagine the American suburban home for the 21st century. For decades, the suburban house has symbolized comfort and stability, but today it often reflects excess, isolation, and environmental strain. This competition asks: how can the American home evolve to address climate urgency, economic pressures, and shifting social values?

Participants are tasked with designing a prototype home of no more than 1,500 sq ft (≈140 m²) for a household of two adults and one child. The design should be compact yet generous, adaptable, sustainable, affordable, and replicable across diverse U.S. contexts. More than a design exercise, the competition aims to spark a conversation about how homes can support healthier, smarter, and more connected communities.

The total prize fund is $20,000 USD. The final registration deadline is May 20, 2026, and winners will be announced on September 22, 2026. The Next House: USA invites architects, students, and visionaries worldwide to redefine what the American home means today—and what it should mean tomorrow.

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