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Hydrophobic Roofs and Photovoltaic Solutions in Sustainable Urban Living

Authors:
Kathryn Larsen, William Qian
Hydrophobic Roofs and Photovoltaic Solutions in Sustainable Urban Living
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Utilizing hydrophobic roofs and integrated photovoltaic systems, the design offers a sustainable urban living solution that enhances resource management and community engagement in Copenhagen.
5 key facts about this project
01
Utilizes low-energy IoT sensors for enhanced energy efficiency.
02
Incorporates hydrophobic roofing for improved water management.
03
Features a compact microhome typology designed for high density.
04
Promotes community engagement through shared resource management systems.
05
Sits adjacent to the Amager Fælled, preserving vital green space.

Tommelisehuse is located in Copenhagen and aims to create sustainable urban living while protecting the important green area of Amager Fælled, which faces the risk of development. The design uses traditional Danish housing as its foundation, incorporating modern architectural practices and technologies. The goal is to balance urban density with natural elements, fostering community involvement and environmental care.

Architectural Concept

The design draws inspiration from the Danish Bondehus, offering a modern take on a cultural classic. It addresses contemporary housing needs by introducing microhome typologies that can accommodate around 2000 people on just 5 hectares. This arrangement promotes dense living while being mindful of the surrounding environment.

Sustainability Framework

A key part of the project is its strong sustainability framework, featuring both the House of Solar and the House of Water. The House of Solar utilizes low-energy Internet of Things (IoT) sensors, which help create a connected living environment. This arrangement improves energy efficiency and allows for real-time monitoring of energy use. By implementing these technologies, the design aims to lessen the overall impact on the environment while ensuring residents’ comfort.

Resource Management

The House of Water focuses on effective resource use, integrating systems that promote water efficiency and storage. This part of the design aims to reduce water waste and encourage sustainable habits among residents. It tackles the challenges of urban water management, making sure the project supports the needs of its community while prioritizing environmental responsibility.

Technical Details

Photovoltaic cell panels and hydrophobic coating roofs are key features, enhancing the energy performance of the homes. These technologies contribute to the self-sufficiency of the microhomes and reflect a commitment to sustainable practices. The layout and architectural details emphasize thoughtful interaction with both social and environmental contexts, positioning Tommelisehuse as a model for future urban developments.

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

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Competition organisers

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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