In 1850 the company was founded as an association and converted to a cooperative in 1906.

In 1977 it bought several multi-family houses and entered the real estate business, subsequently built via further purchases.

To divide the bank business and real estate activities, a new organization was founded in 2004.

The former cooperative bank Sparhafen Zürich was converted to the roofing company BSZ Genossenschaft.

The existing banking was incorporated to the new subsidiary Bank Sparhafen Zürich, and the properties management was transferred to the subsidiary BSZ Immobilien AG.