Vocational School for Building Trades by Gunz & Künzle Architekt innen: A Modular Marvel in Zürich

Architects: Gunz & Künzle Architekt*innen
Location: Limmatstrasse 53, 8090 Zürich, Switzerland
Area: 10,200 m²
Year: 2025
Photography: Federico Farinatti
Sustainability Certifications: Minergie-P-ECO, SNBS Gold
Key Manufacturers: RAICO (facades), Troldtekt (acoustic panels), DLW (flooring), Kvadrat (textiles), Wicona (windows)

A Vertical Campus for Vocational Learning

Gunz & Künzle Architekt*innen’s Vocational School for Building Trades in Zürich redefines urban educational architecture through its ingenious vertical stacking of functions. Designed to maximize a constrained urban site, the 10,200 m² structure integrates classrooms, workshops, gymnasiums, and public spaces within a cohesive concrete framework. The building’s layered organization with a floating piano nobile suspended above dual gymnasiums creates a dynamic interplay between pedagogy and civic engagement, fostering a dialogue between students and the surrounding neighborhood.

Design Philosophy: Flexibility as a Core Principle

Winning a 2018 competition, the architects prioritized adaptability and longevity. The concrete “kit-of-parts” system allows spaces to evolve alongside educational needs, avoiding rigid formal gestures. The piano nobile acts as a social and functional hub, hosting exhibitions, workshops, and events, while upper floors adhere to a disciplined grid of classrooms. Movable partitions, durable materials (like Troldtekt acoustic panels and RAICO façades), and exposed structural elements turn the building itself into a teaching tool, showcasing construction logic and sustainable practices.

Sustainability and Material Innovation

Aligned with Zürich’s stringent ecological standards, the project achieves Minergie-P-ECO and SNBS Gold certifications. Key features include:

• Energy-efficient façades (RAICO) with high thermal performance.
• Acoustic optimization via Troldtekt ceilings and Kvadrat textile integrations.
• Modular flooring (DLW) for easy reconfiguration.
  The design emphasizes lifecycle sustainability, with materials chosen for durability and low maintenance, reducing long-term environmental impact.

Programmatic Efficiency

The school accommodates:

• 31 classrooms and specialized model-making labs.
• Multi-purpose halls for vocational training and community events.
• Dual gymnasiums serving both school and public use.
  The ground-level courtyard and street-facing transparency enhance connectivity, blurring boundaries between the institution and the city.

Critique: Balancing Openness and Identity

While the building excels in flexibility, some may argue its aesthetic neutrality prioritizing function over bold formal expression could dilute its architectural identity. However, this restraint is intentional, ensuring the structure remains a canvas for its users’ activities rather than a static monument.

Conclusion: A Model for Future-Focused Education

Gunz & Künzle’s project sets a benchmark for adaptive, sustainable vocational schools, proving that spatial intelligence and ecological rigor can coexist. By embedding resilience into every detail, from modular walls to energy systems, the design anticipates decades of evolving educational demands.

✦ ArchUp Editorial Insight

Gunz & Künzle’s Vocational School for Building Trades masterfully tackles urban density and pedagogical flexibility through its layered, modular design. The suspended piano nobile and exposed structural kit reflect a thoughtful approach to long-term adaptability, though the architecture’s deliberate neutrality might leave some craving a stronger visual signature. Yet this restraint is precisely its strength the building avoids dictating its identity, instead empowering users to shape its legacy. Ultimately, its seamless integration of sustainability, education, and public engagement makes it a quietly revolutionary addition to Zürich’s architectural landscape

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