Co-ownership conflicts often arise from a lack of knowledge of the rules governing the immovable, a lack of communication or transparency, or from an unresolved misunderstanding.
Know that in such cases, a trial is not the only avenue available to you. Before commencing legal proceedings, and even once they are engaged, and even once they are initiated, there is always time to opt for the services of a mediator. The latter, who is a neutral and impartial third party, could help you resolve (without decision-making power) a dispute between a co-owner and the syndicate or members of the board of directors between them.
When the work of a co-owner has an impact on the common portions, the latter must obtain authorization from the meeting of co-owners to have it undertaken, even if the work is carried out in his private portion. This authorization requires a vote, the majority of which is greater than that required for the current decisions. Failure to comply with this rule could result in a co-owner being ordered to restore the premises to their original state or even to pay damages.