the tenant cockpit of GESOBAU Berlin The GESOBAU Berlin app enables GESOBAU tenants to contact us easily and at any time.Damage can be reported, inquiries made, documents downloaded and heating and water consumption viewed. Use the GESOBAU Berlin app for up-to-date information about your rental apartment. My rental contract: Here you can view data on the rental contract, the composition of the rent and contact persons. My concerns: Here you can send us damage reports and concerns about the tenancy and track the processing status. My documents: Here you can view or download documents relating to your rental agreement. My consumption: Always everything in view. Here you can see how your consumption values for heating and water are - currently and in comparison to the same period last year.