In its ruling of 14 June 2019, the Federal Supreme Court ruled that owners who have repairs carried out on their joint property without authorisation are not entitled to reimbursement of costs by the WEG. In the present case, an owner had repairs carried out on his windows without the prior decision of the owners' association.

It is reasonable for the condominium owner concerned to comply with the procedure stipulated by the Condominium Ownership Act in any case. It could bring about a resolution of the residential properties over the execution of the necessary measure. If the request does not find the necessary majority in the residential properties meeting, it can raise the resolution replacement complaint after § 21 exp. 8 WEG. Also the issuing of a provisional order comes into consideration.