First of all you have to check your deeds and the commonhold community statement (escritura de declaracion de obra nueva y propiedad horizontal) in order to find out whether the balconies are common parts or not. Usually there is no express reference about this matter in most of the deeds so surely your balcony is a common part subject to private and exclusive use. That means some kind of accountability on the community.
You are dealing very well so far with this issue because you have a developer and an Owners’ Committee recognizing the fault.
The developer’s excuse is ridiculous. He is admitting that the repair has to be done but because of lack of Owners’ Committee resolution he is not allowed to do so. Thus, he is asserting that the balcony is a common part. As you probably can imagine the Owners’ Committee deals usually with issues related to common parts so if the Committee has previously dealt with similar cases in certain way it is not entitled to act in a different manner.
Can you tell us something about the previous agreement of the meeting in regard with this problem? If the community did not pay to the developer for such works in the other flats I can’t understand the necessity of agreement about this matter. The developer does not need any permission from the Owners Committee in order to repair this kind of faults
Who can be sued in your case?
You may claim against your neighbour, developer and against the community in the same lawsuit (better safe than sorry)
Against your neighbour under section 9 (1) (b) of the Act
The duties of each owner include:
(b) to maintain their own flat or premises and private installations thereof in a good condition so that no harm is caused to the commonhold or other owners
Each owner should be responsible for the repair and maintenance of the interior of his unit, and is required to carry out the adequate repairs. He should avoid damages to the common parts or to other owners.
Against your community under section 10 (1)
(1) The commonhold is obliged to carry out works necessary for the proper upkeep and maintenance of the building and its facilities to ensure appropriate structural conditions, imperviousness, habitation and safety You can also add case law in which courts recognize a duty on the community to sue for building defects
Against the developer
In this case the court could be reluctant because the fault is not in your property