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Bridging Urban Density with Steel and Polycarbonate Microhomes

Author:
Louise Van Der Meulen
Bridging Urban Density with Steel and Polycarbonate Microhomes
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Utilizing steel cross bracing and a curtain wall system of polycarbonate and glass, this microhome effectively transforms urban bridges into functional living spaces that enhance community density and sustainability.
5 key facts about this project
01
Utilizes existing bridges as foundations for microhousing.
02
Features a curtain wall system for enhanced natural light.
03
Incorporates rainwater harvesting for sustainable resource management.
04
Designed with steel cross bracing for structural stability.
05
Promotes community integration in urban settings.

The Bridge Microhome is an innovative solution to the housing challenges in Pretoria's Central Business District. It addresses issues of segregation and low density, which affect the community's cohesion and access to services. By reimagining bridges as living spaces, the design aims to create a more interconnected urban environment. This approach enhances density without taking away from green areas, thus providing much-needed housing while promoting sustainable living.

Structural Integrity and Functionality

The microhome is designed for efficiency and practicality. It features a Murphy bed that allows the living area to adapt between day and night uses, making the most of limited space. The kitchen, dining, and working areas are arranged as multifunctional spaces, ensuring residents can perform daily tasks without feeling cramped. A separate bathroom adds essential amenities, ensuring comfort and privacy for those who live here.

Material and Construction Approach

Steel cross bracing provides stability and durability to the structure, helping it withstand various environmental conditions. The curtain wall system includes glass and polycarbonate panels, allowing plenty of natural light to fill the interior. This design choice creates a bright living atmosphere and links indoor spaces with the outdoors, enabling residents to experience their urban surroundings without barriers.

Sustainable Systems

Sustainability is integrated into the design in several meaningful ways. Solar energy collection systems reduce dependence on traditional power sources, contributing to energy efficiency. Rainwater harvesting captures important resources during wet weather, while a municipal water connection ensures consistent access to clean water. The septic tank effectively manages waste. A quantum filtration system further enhances water quality, improving the living experience within this compact home.

Design Details and Aesthetic Elements

Thoughtful design details throughout the microhome create a sense of community within the urban environment. The use of perforated metal sheets supports ventilation and maintains visual connections between spaces. This design promotes a balance between private and communal living. The combination of light and shadow within the structure, along with the adaptive use of existing infrastructure, results in a microhome that is both functional and effective in meeting the needs of urban residents.

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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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