Can neighbours object to a proposed dual occupancy?

Yes. Neighbours can submit a representation (comment or objection) during the public notification period for a dual occupancy Development Application.

The Territory Planning Authority must consider representations received within the notification period. Relevant concerns can include matters such as privacy, solar access, traffic and impacts on surrounding development.

However, an objection does not automatically prevent the dual occupancy from being approved. The decision is based on the planning merits of the proposal, not simply on the number of objections received.

Reference: ACT Government – Public Notification and Representations - https://www.planning.act.gov.au/applications-and-assessments/development-applications/after-you-apply