The building procedure reviews different issues from a private neighbour dispute. Setbacks, building height and procedural rights are not identical to possession interference, emissions or contractual arrangements.
A neighbour may therefore be bound in the public procedure and still have private-law points to review, or may still have public-law objections while settlement talks are ongoing.
For the right strategy, it must be clear whether a filing with the authority, a civil-law demand or a negotiated solution is the useful next step.