Founded in 2022 by Pierre Longhini, PL-Arch is an architecture practice based in Geneva and active across Switzerland, France, the UK, and beyond. Born from the belief that architecture should transcend borders and disciplines, the studio approaches every project as an opportunity to design spaces that are both visionary and practical.

We work at every scale — from private homes and interiors to urban developments — combining creativity with technical precision. Our projects are guided by three principles: sustainability, adaptability, and collaboration. Clients are at the heart of this process: we see design as a dialogue, where ideas evolve together into spaces that truly reflect their users’ needs.

What makes us different is our international reach and multidisciplinary expertise. Whether designing a new building, reshaping an interior, or developing an urban plan, we deliver a seamless approach that integrates concept, design, and execution. Agile and globally connected, we can adapt to diverse contexts while maintaining the same commitment to detail and quality.

At PL-Arch, we see architecture not only as the act of shaping spaces, but as a way to connect people, cultures, and disciplines — creating environments that inspire and endure.