Retrospective building approval is the process of seeking formal approval for construction or renovation work that has already been completed without the necessary permits or approvals. This type of approval is typically required when alterations, additions, or structures such as decks, sheds, or carports are built without prior council consent. In Queensland, obtaining retrospective approval ensures that the completed work complies with local building codes, safety standards, and zoning regulations. Property owners must submit an application, provide supporting documentation, and may be required to make modifications to meet compliance requirements. Retrospective approval helps to legalize unapproved work, avoid penalties, and ensure the safety and integrity of the building.