How do overlays affect a dual-occupancy application?
Your block has a zone, such as a residential zone, which sets the main planning framework for what can be developed. An overlay is an extra layer on top of that zone. It identifies an area where something additional needs to be considered when developing the land.
For a dual occupancy, this means you need to check both the residential zone requirements and any overlay applying to the block.
Having an overlay does not automatically mean a dual occupancy cannot be approved. What matters is which overlay applies and what requirements it introduces.
Reference: Planning Act 2023 (A2023-18) – https://www.legislation.act.gov.au/View/a/2023-18/current/html/2023-18.html
Short Answer
An overlay is an additional layer of planning requirements that applies to particular land because the area has special planning controls or considerations.
The overlay works in addition to the zoning of the land.
Detailed Explanation
Territory Plan overlays provide planning instructions for areas where special controls apply. ACT planning material describes overlays in this way and gives examples such as Public Land Reserves and Future Urban Areas.
For a dual-occupancy assessment, the applicable Residential Zone Policy should therefore not be considered in isolation. The site's Territory Plan mapping and any applicable overlay provisions also need to be identified to determine whether they introduce additional assessment considerations or requirements.
The current statutory planning instrument is the Territory Plan 2023 (NI2023-540), Republication No. 45, effective 4 August 2026. It is made under s 45 of the Planning Act 2023 (ACT)
No minimum block size does not remove the need for planning assessment.
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