Mesnil Architectures works with existing structures to create useful, sustainable and desirable spaces. Founded in 2022 by Antonin Bohl , Mathias Lefebvre , and Arthur Schmitt , three friends united by a shared passion for listening and a common curiosity for architecture, Mesnil Architectures cultivates an approach where sensitivity meets precision . The firm works on rehabilitation , extension , and new construction projects , with a constant focus on materials , uses , and long-term considerations . Balancing heritage and transformation , the firm seeks to create vibrant , energy-efficient , and sustainable architectures that serve the needs of those who inhabit them.