ERLANGEN - The Erlanger real estate company Sontowski & Partner Group sold the apartment house 'Campus trainee' to the Bamberg-based St. Joseph foundation. The residential property that will be built in future consists of 146 apartments. Its total floor space approximately amounts to 3,300 square feet. Already in May 2011, a 10 year rent contract between Sontowski and Siemens was finalised. The transaction's value is estimated to add up to 12 million Euros. Sparkassen GEWERBE IMMO, which is the investment provider of the Bavarian bank 'Sparkasse' also took a stake in the transaction and served as an associate.