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Conical Retreat Crafted from Local Soil and Cement

Authors:
Letizia Spigarelli, Laura Zoppis, Kevin Kleyla
Conical Retreat Crafted from Local Soil and Cement
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Constructed with local soil and cement, the conical form of this retreat enhances natural ventilation and sunlight, providing a sustainable living space that integrates seamlessly with the Puglian landscape.
5 key facts about this project
01
Conical roof design optimizes light and ventilation.
02
Constructed using locally sourced soil, enhancing ecological integration.
03
Central millwork consolidates multiple living functions efficiently.
04
Incorporates a rainwater harvesting system for sustainability.
05
Outdoor spaces encourage interaction with the surrounding landscape.

The Solar Lantern is an architectural creation located in Puglia, Italy, designed as a retreat for young professionals. It blends the idea of sustainable living with elements of local architectural tradition. The structure features a tapered conic form inspired by traditional Apulian trulli, which helps create an efficient flow of natural light and air.

Architectural Form
The most noticeable aspect of the Solar Lantern is its conical shape. This design maximizes ventilation and allows sunlight to fill the space. The roof is angled to capture sunlight during winter months while minimizing heat exposure in summer. This thoughtful design enhances comfort indoors and serves as a natural indicator of the seasons, reminding inhabitants of the changing daylight throughout the year.

Interior Organization
Inside, a central millwork element defines how the space is organized. It combines essential functions such as the kitchen, bathroom, and living areas into one coherent layout. This centralization promotes efficient use of space and offers flexibility. Residents can adapt the area to suit different activities, balancing personal privacy with opportunities for social interaction.

Material Utilization
The structure uses materials that come from the surrounding area, specifically local soil, cement, and bricks. These materials connect the building to its environment and align with historical construction techniques. They are chosen not only for their availability but also for their ability to help keep indoor temperatures comfortable year-round. Using these materials also emphasizes a commitment to sustainability.

Sustainable Features
In addition to its basic structure, the home includes a rainwater harvesting system that supports efficient water use. This reflects a thoughtful approach to environmental responsibility. Alongside solar panels that can be positioned according to the sun’s path, these features allow the building to lessen its impact on the environment while providing necessary resources for everyday living.

Outdoor spaces play a crucial role in the design, encouraging residents to engage with nature. These areas serve as extensions of the indoor living space, providing room for relaxation and social gatherings. The open layout invites interaction with the natural surroundings, enhancing the overall living experience and connecting residents to their landscape.

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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 €
Eligibility Open to all
Final registration deadline 30 October 2025

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