When is a site analysis required?
Not every DA needs a separate Site Analysis Plan. Whether one is required depends on the type of development and the issues that need to be assessed.
A site analysis is used to identify the constraints and opportunities of the site that may influence the design. ACT Planning describes it as potentially considering matters such as slope and prevailing wind direction.
For residential projects, a site analysis may be particularly useful where the site’s characteristics—such as slope, existing trees, adjoining development or other physical constraints—need to be understood to explain how the design has responded to the block.
For example, on a steep residential block with significant existing trees, a site analysis can help demonstrate how those conditions influenced the location and form of the proposed buildings.
Reference: Minimum DA Documentation Guideline (NI2026-13) – Minimum documentation matrix and “Site Analysis Plan” – https://www.legislation.act.gov.au/ni/2026-13/
Short Answer
A site analysis is required where the Minimum DA Documentation Guideline identifies it as required or relevant for the particular development, or where ACT Planning requests it. It is not a mandatory document for every type of DA.
Detailed Explanation
The current Minimum DA Documentation Guideline (NI2026-13) is the appropriate reference for determining whether a Site Analysis Plan is required for a particular DA. Its documentation matrix distinguishes between documents that are required and those that are required if relevant or requested, depending on the development type.
The Guideline describes a Site Analysis Plan as documenting the site's existing characteristics and context. The current requirements include information relevant to matters such as existing site conditions, vegetation and trees, contours, structures, boundaries and other characteristics necessary to understand the development site.
ACT Planning's Development Application Naming Conventions ? Site Analysis further explains its purpose:
It is used to understand the site's constraints and opportunities that may have influenced the development.
Examples given by ACT Planning include prevailing wind direction and slope analysis.
Survey information can also contribute to preparing the site analysis. ACT Planning specifically notes that survey information identifying buildings, fences, trees, service easements and site levels can assist during the site analysis and early design process.
Therefore, a separate Site Analysis Plan should not be described as universally required for every residential DA. Its requirement should be checked against the current Minimum DA Documentation Guideline for the specific development type and whether the document is relevant or requested.
No minimum block size does not remove the need for planning assessment.
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