Yes, a qualified arborist can absolutely provide a professional arborist report to support a resource consent application in New Zealand. In fact, for applications involving protected, notable, or significant trees, councils will often require one. Understanding what these reports cover — and who should write them — can save you time and help your application succeed.
What Is an Arborist Report?
An arborist report (sometimes called a tree assessment report or tree survey report) is a formal written document prepared by a qualified arborist that assesses the condition, value, and management requirements of one or more trees. When submitted alongside a resource consent application, it gives the council's planners and arborists the technical information they need to make an informed decision.
Reports typically cover:
- Tree identification — species, age estimate, and size (height, canopy spread, trunk diameter)
- Tree health and condition — structural integrity, disease, pest damage, and life expectancy
- Amenity and ecological value — visual, cultural, or habitat significance
- Risk assessment — potential hazards to people or property
- Impact assessment — how proposed works (construction, earthworks, removal) will affect the tree
- Recommendations — whether removal, pruning, or protection measures are appropriate
- Tree Protection Zones (TPZ) — defined exclusion areas to protect roots and structure during construction
When Is an Arborist Report Required?
You are most likely to need an arborist report when:
- You want to remove, prune, or carry out works near a scheduled or notable tree listed in your district plan
- Your development involves earthworks, excavation, or construction near significant trees
- You are subdividing land and trees may be affected
- A neighbour's tree overhangs your property and you need formal documentation
- Your council's resource consent conditions specifically request one
District plans vary significantly across New Zealand, so always check with your local council about exactly what is required before commissioning a report. What triggers consent in Auckland may differ from Wellington, Christchurch, or a smaller territorial authority.
Who Should Write the Report?
For a resource consent application, the report carries much more weight when it is prepared by a suitably qualified professional. Look for an arborist who holds:
- NZ Certificate in Arboriculture (Level 4) or higher, or
- ISA Certified Arborist (International Society of Arboriculture) credentials, or
- NZQA-recognised qualifications in arboriculture
Many councils specifically request or prefer reports from Level 5 qualified arborists or those with a Diploma in Arboriculture, particularly for high-value or complex tree assessments. Some councils have their own preferred qualifications listed in their district plan or resource consent guidance — it pays to check before you engage someone.
A well-credentialled arborist will also carry professional indemnity insurance, which adds further credibility to their report.
What Makes a Good Arborist Report for Resource Consent?
A strong report for resource consent purposes should:
- Be objective and evidence-based, not simply advocate for the applicant
- Follow a recognised methodology such as the Quantified Tree Assessment (QTA) or TRAQ (Tree Risk Assessment Qualification) framework
- Include photographs, site plans, and tree location maps
- Clearly reference the relevant district plan rules and how the trees meet (or don't meet) the criteria for scheduling
- Provide mitigation measures if works are proposed near protected trees — for example, specifying root zone protection, construction methodology, or replacement planting
Councils can and do decline resource consent applications where the arborist report is inadequate or prepared by someone without appropriate qualifications, so it is worth investing in quality.
Costs and Timeframes
As a rough guide, a basic single-tree arborist report might start from a few hundred dollars, while a comprehensive report covering multiple trees on a development site could run into several thousand dollars. Costs vary depending on the number of trees, site complexity, travel, and the arborist's experience. Always get a written quote upfront.
Allow enough time — a thorough report can take one to two weeks to prepare after the site visit, and your council may then take 20 working days (or longer for notified consents) to process the application.
When to Call a Professional
If your resource consent application involves trees in any way, engaging a qualified arborist early is strongly recommended — ideally before you finalise your plans. An experienced arborist can:
- Advise whether consent is actually required
- Help design your project to avoid or minimise tree impacts
- Prepare a report that meets your council's specific requirements
- Liaise with council arborists on your behalf if needed
You can find qualified local arborists on tradedirectory.co.nz. Always ask to see their qualifications and check they have experience preparing resource consent reports specifically.
For guidance on the resource consent process itself, Your local council's planning team are your best starting points for guidance on the resource consent process. MBIE Building Performance covers building consent matters. BRANZ also publishes useful guidance on construction near trees.
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