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Rooftop Gardens and LVL Structures Enhancing Urban Living in Berlin

Authors:
Mutaz Alabtah, Mariia Khalimon, Batool Alkheder
Rooftop Gardens and LVL Structures Enhancing Urban Living in Berlin
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Utilizing LVL materials and integrating rooftop gardens, the design redefines urban housing in Berlin by adding adaptable living spaces atop existing buildings.
5 key facts about this project
01
Utilizes LVL materials for efficient structural support.
02
Features semi-private rooftop areas for communal use.
03
Located exclusively on flat rooftops of existing buildings.
04
Offers approximately 128 modular configurations for adaptability.
05
Integrates solar panels for energy-efficient living.

The Plus One project addresses the need for more housing in urban areas, specifically in Berlin. It takes advantage of flat rooftops to increase the availability of residential units. The design aims to offer additional living spaces without disrupting the existing urban landscape. By promoting more efficient use of space, this initiative seeks to create a balance between city growth and environmental care.

Modular Design

The concept of Plus One centers around modular units that can be adjusted and resized based on the needs of residents. This design allows for both horizontal and vertical expansion, providing a variety of configurations for living spaces. With about 128 possibilities, each unit can be tailored to suit different lifestyles. This flexibility encourages diverse living arrangements and enhances the overall residential experience.

Utilization of Existing Structures

The project makes effective use of existing flat roofs, which occupy 45% of the built landscape in Berlin. There are approximately 70,000 buildings that could be adapted for this purpose, showcasing the potential for urban expansion without encroaching on green spaces. By repurposing rooftops, Plus One addresses the rising demand for housing while preserving the character of Berlin's neighborhoods and their natural surroundings.

Sustainable Components

To ensure both functionality and sustainability, certain components are integrated into the design. Each modular unit features LVL (Laminated Veneer Lumber) floors with sound insulation, creating comfortable living conditions. LVL timber posts and beams offer strong and lightweight structural support, which helps to speed up construction. In addition to these elements, the LVL roofs include thermal and fire insulation, promoting energy efficiency and safety for residents.

Outdoor Spaces

The project emphasizes outdoor semi-private areas like roof gardens and communal BBQ spaces, encouraging residents to connect with nature and with one another. This design creates opportunities for social gatherings and personal relaxation. Moreover, the inclusion of solar panels reflects a commitment to energy-efficient living. Accessible public spaces encourage community interactions, while access points to roofs and vertical pathways ensure that everyone can move easily between units.

The modular nature of the design allows for easy disassembly and adaptation over time. This focus on sustainability means that the units can be reconfigured as community needs change. Each addition features personalized outdoor spaces that enhance the living experience while integrating natural elements into urban life.

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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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