What are the main misunderstandings about co-ownership?
Any private installation is subject to the vote of the assembly. Do you want to install a pergola? A charging station in your parking space? It will be necessary to obtain the permission of the co-owners during the GA.
The building manager must be warned in the event of a problem. Keep in mind that, unlike you, the building manager does not necessarily live on site. In case of malfunction, remember to notify it as soon as possible, along with the homeowner association board that will keep track of developments.
All problems are not the responsibility of the building manager. The building manager manages the common areas, but not the private areas. Is your radiator leaking? Call a plumber. Notify the building manager only in the event of a problem on the installation. Is your neighbour parking in your parking space? Ask them to respect your property right, as the building manager is not competent to resolve disputes that are the responsibility of private parties.
In the event of damage, everyone pays. The garage door was damaged but who is to blame? Did someone leave an old fridge in the courtyard? When the culprit cannot be identified, all the co-owners have an obligation to pay for the repair of the door or the evacuation of bulky objects.
The cost of major works must be anticipated. From October 2022, depending on the energy class of the building, each co-owner will have to contribute a certain amount to a works fund that serves to anticipate an expensive renovation: roof, facade, thermal insulation, etc.