Let's create living spaces

Born from the merger between m3 Immobilier and Steiner Development, our company is now one of Switzerland’s leading independent real estate developers. This strategic alliance brings together two complementary players, driven by a shared vision: to design and develop sustainable, innovative, value-creating real estate projects on a national scale.

Based in Geneva, m3 Immobilier has established itself over the years as a leading real estate platform, recognized for the quality of its projects, its expertise in the French-speaking Swiss market, and its integrated approach covering the entire real estate value chain. Steiner Development, which emerged from the spin-off of Steiner AG, brings recognized expertise in project development throughout Switzerland, with a strong presence in German-speaking Switzerland.

The merger is based on sound and solid foundations: the prior separation of Steiner Development made it possible to isolate real estate development activities, thus providing a clear, independent, and attractive framework for sustainable growth. By bringing together the best talent from both organizations, the new entity benefits from expanded expertise, in-depth knowledge of local markets, and a strengthened ability to manage complex projects from conception to completion.

Our ambition is clear: to be Switzerland’s leading real estate developer! We combine strategic vision, operational excellence, and a customer-centric approach. Thanks to our national presence and Swiss structure, we guarantee smooth project implementation in compliance with regulatory frameworks and market requirements.

Today, we are moving forward with a common roadmap, driven by a strengthened organization, a shared entrepreneurial culture, and the desire to build sustainable, high-performance real estate projects that are adapted to the challenges of tomorrow.