A sale requires every single co-heir
Under section 2040 of the German Civil Code, co-heirs can only dispose of an estate asset jointly. A sale therefore needs every signature without exception; a majority is not enough. This is why a single co-heir can bring an entire community to a standstill.
Day-to-day administration is different. Necessary repairs, extending a tenancy or instructing a property manager count as proper administration and can be decided by a majority of shares under section 2038(2) together with section 745.

