Does an existing unapproved structure affect my DA?

Yes, it can. An existing unapproved structure should be identified when preparing a dual-occupancy DA and may need to be addressed depending on whether it will be retained, altered or removed.

ACT Planning's DA documentation system specifically recognises a “Plan of Existing Unapproved Development” for identifying development undertaken without the required approval.

Any separate building-compliance issues associated with the unapproved structure may also need to be resolved through the appropriate process.

Reference: ACT Planning – Development Application Naming Conventions - https://www.planning.act.gov.au/applications-and-assessments/development-applications/browse-das/development-application-naming-conventions