Can an irregular-shaped block still be developed?
An unusual block shape does not automatically prevent development. What matters is whether a compliant and functional development can be designed within the actual boundaries of the block.
For example, a triangular block may become very narrow toward the rear. Once the required side and rear setbacks are applied, there may be less usable space for a building than on a rectangular block of the same overall area.
The design may therefore need to be adjusted to suit the site's shape.
Reference: Planning (Residential Zones) Technical Specifications 2026 (NI2026-303) – Planning (Residential Zones) Technical Specifications 2026 | PDF
Short Answer
Yes. An irregular-shaped block can still be developed. There is no general requirement in the current ACT residential planning framework that a block must be square or rectangular.
However, the shape of the block can affect the type, size and layout of development that can fit on the site, because the proposal must still satisfy the applicable planning requirements, such as setbacks, site coverage, building separation, private open space, planting, access and parking. The current Residential Zones Technical Specifications have been in effect since 1 July 2026.
Detailed Explanation
The Planning (Residential Zones) Technical Specifications 2026 (NI2026-303) establishes the applicable technical requirements for residential development. It does not establish a general prohibition on development simply because a block has an irregular shape.
Instead, development potential depends on whether the proposal can satisfy the requirements applicable to that particular site and development type. Consequently, an irregular shape may constrain the available development envelope, but does not by itself make the block undevelopable.
Example: An 800 m² irregular or triangular block may still accommodate residential development, but its narrowing boundaries could make it more difficult to achieve the required setbacks, building footprint, private open space and vehicle access than on a regularly shaped 800 m² block.
No minimum block size does not remove the need for planning assessment.
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