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Vertical Expansion with Fiber Cement and Wooden Additions for Urban Housing

Authors:
Anna Niedźwiecka, Daria Kaczmarczyk, Paulina Cieśla, Emil Micewicz
Vertical Expansion with Fiber Cement and Wooden Additions for Urban Housing
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Combining vertical residential units with lightweight wooden construction and fiber cement siding, the design reimagines existing plattenbau structures to enhance urban housing density and sustainability.
5 key facts about this project
01
Incorporates scaffolding to ensure sunlight access for all residential units.
02
Utilizes removable installation segments for efficient utility management.
03
Features lightweight wooden construction for quick assembly and transport.
04
Prioritizes rainwater management with integrated reservoirs and septic systems.
05
Enhances existing plattenbau structures by adding vertical residential units.

The Parasite House project addresses housing challenges linked to plattenbau structures in urban areas like Warsaw. Developed during the housing crisis of the 1950s, these buildings used prefabricated concrete slabs to offer affordable solutions. However, as urban needs evolve, the limitations of plattenbau construction regarding density and livability are becoming clearer. The Parasite House concept looks to improve these structures by adding new living spaces that extend vertically along their facades, enhancing the function without requiring more land.

Architectural Concept

The design introduces a model that expands vertically, allowing the creation of new residential units that rise along existing walls. By doing this, it increases housing density while preserving the character of the original buildings. The project aims to blend old and new elements, fostering a sense of continuity in the urban landscape.



Light and Sustainability

Ensuring natural light reaches all living units is a crucial aspect of the design. Scaffolding is used not just for support during construction but also to maintain access to sunlight for residents. The careful positioning of photovoltaic systems takes advantage of the buildings' east-west orientation, ensuring effective solar energy capture and promoting greater sustainability in energy usage.



Water Management

Water and energy management are also key considerations in the design. The Parasite House includes a removable installation segment that provides clean water and electricity to residents. Effective solutions such as rainwater reservoirs and a septic system help manage essential utilities, reducing the overall environmental impact in a city setting.



Materiality

Lightweight wooden construction is chosen for its benefits in transport and installation. This approach fits with current sustainability practices and allows for speed in assembly while maintaining structural strength. Additionally, fiber cement siding adds durability and improves the appearance of the new living spaces, helping them blend with their surroundings.

The outcome results in flexible living areas that meet modern demands. Features such as two independent workspaces cater to the rising trend of remote work, reflecting the need for multifunctional environments in today’s urban life.

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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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