To a developer, an arborist report feels like a tax on the project. To an assessment officer, it’s the only evidence they have that someone competent actually walked the site. That mismatch explains most report-related DA delays in Queensland.
Having written (and defended) thousands of reports, here’s what separates the ones that sail through from the ones that boomerang back with an information request.
What assessment officers look for first
Qualified author (AQF Level 5, named, with credentials). Correct methodology named and followed — AS 4970 for protection zones, a recognised risk framework for hazard work. Site-specific data: actual measured trees, actual photos, actual mapping. Templated text with find-and-replace addresses is spotted in seconds and trusted accordingly.
The data that carries weight
Species identified properly (not “gum tree”). Trunk diameters measured, not estimated. TPZ and SRZ calculated and mapped against the proposal. Tree condition described in arboricultural terms with clear retention values. Recommendations that address the relevant planning code directly — that last point alone halves approval times.
The mistakes that trigger refusals
Reports written after the design is finished (trees discovered where the driveway goes). Ignoring off-site trees whose zones cross the boundary. Proposing “prune to clear” for conflicts that need redesign. And the classic: no photos, no map, no measurements — just opinions.
How to use the report strategically
Bring the arborist in at concept stage, not lodgement stage. A retention-led design — one that shows officers the significant trees staying — reframes your whole application. The report stops being a hurdle and becomes your project’s credibility document.
A great report doesn’t argue with council — it answers their questions before they ask. That’s what Level 5 experience buys you.
