Do I understand correctly that this is the outside wall facing the street being repaired first? If so, it does not sound unreasonable to repair the most visible face of the building as the first priority. That benefits all owners I would have thought. Even if your unit is on the other side, it makes a better initial impression to visitors or potential buyers.
In due course all should be repaired. Perhaps the plan is to see how doing this face goes then move on to the next section and so on. Thereby the cost is spread over some years.