m3 Steiner Development Ltd. acquired 100% of the shares in Steiner Development AG – free of legacy assets – from its previous owner, Steiner AG. The company also owns 100% of the shares in m3 Immobilier Holding SA.
As a fully Swiss-owned company, the group is not subject to Lex Koller restrictions when acquiring residential properties.

This consolidation creates a strong and independent platform for real estate development throughout Switzerland, combining networks, expertise, and resources of two established players. With a combined project pipeline of over 65 development projects valued at more than CHF 5 billion , the group is well-positioned nationwide. We operate offices in Zurich, Berne, Basel, Lausanne and Geneva.