Questions to Ask an Arborist Before You Hire Them

Why it pays to ask the right questions

Tree work can look straightforward from the street, but it often involves working at height, near power lines, over buildings, driveways, fences and gardens, and in some cases dealing with protected trees or council rules. In New Zealand, a good arborist should be able to explain exactly what they’ll do, how they’ll do it safely, and what the finished result will look like.

Asking a few practical questions before you hire helps you:

• compare quotes on a like-for-like basis
• avoid surprise costs for stump grinding, chip removal or traffic management
• check whether the arborist has the right experience for your type of tree work
• understand whether any council permission or tree protection rules apply
• make sure the work is carried out safely and insured properly

If the job involves only pruning or removal of trees, you usually won’t need a building consent. However, tree work can still be affected by local district plan rules, heritage overlays, notable tree schedules and resource consent conditions, so it’s worth confirming this before work starts.

1) What experience do you have with this type of tree work?

Not all tree jobs are the same. Removing a small ornamental tree in an open backyard is very different from pruning a large mature tree over a roof, or working on a tree close to overhead lines.

Ask:

• How long have you been working as an arborist?
• What type of tree work do you do most often?
• Have you handled jobs like mine before?
• Who will actually do the work on site?

A useful arborist should be able to describe similar jobs they’ve completed and explain the risks involved. If your tree is near a house, power lines, a boundary, a retaining wall or a swimming pool, ask whether they regularly work in those conditions.

If you need tree pruning for health, shape or clearance, ask whether they follow recognised pruning practices rather than “topping” the tree. Topping can leave trees unstable, unhealthy and more likely to fail in future storms.

2) What qualifications, training or professional memberships do you hold?

Arborists in New Zealand are not all licensed in the same way as electricians or plumbers, but qualifications still matter.

Ask:

• Do you hold any arboriculture qualifications or certifications?
• Are your climbers and operators trained for the equipment they use?
• Do you belong to any industry body or professional association?
• How do you keep up with current safety and arboricultural practices?

Qualifications are not the only indicator of quality, but they can show the arborist has formal training in tree biology, pruning, rigging, chainsaw use, and safe work practices.

If they will be using machinery such as a wood chipper, stump grinder, elevated work platform or cranes, it is reasonable to ask whether operators are trained and competent on that equipment.

3) Are you insured, and what does your cover include?

Insurance is one of the most important things to check. Tree work can go wrong even when everyone is careful, especially in confined spaces or during windy weather.

Ask for proof of:

• public liability insurance
• vehicle and equipment cover, if relevant
• workers’ compensation or equivalent cover for staff

Then ask what the policy covers. For example:

• accidental damage to your house, roof, fence or vehicles
• injury to people or visitors on site
• damage to neighbouring property
• damage caused during stump grinding or mulching

Do not rely on “we’re insured” without confirmation. A professional arborist should be comfortable providing a current certificate of currency or similar evidence.

4) Is my tree subject to any council rules or consent requirements?

This is especially important in areas with mature trees, coastal properties, heritage streetscapes or established suburbs.

Ask:

• Do you think this tree is protected by the local council?
• Do you know whether a resource consent or council approval is needed?
• Will you help identify any restrictions before the work starts?

In New Zealand, tree protection rules are usually set by local councils through district plans, not by a single national tree law. Some councils protect notable trees, scheduled trees, or trees in special character areas. In some cases, approval may be needed before pruning or removal, even if the tree is on private land.

A good arborist should flag this early, but you should still check with your local council if there’s any doubt. If a property is managed by a body corporate, residents’ association, or tenancy agreement, there may also be extra approval steps.

5) How will you assess the tree and decide what needs to be done?

Before quoting, a good arborist should inspect the tree in person where possible. A proper assessment usually includes the tree’s size, species, condition, location, target area and likely future growth.

Ask:

• Will you inspect the tree on site before quoting?
• What are you looking for during the assessment?
• Is the tree being pruned for health, clearance, safety or appearance?
• Are you recommending removal, or could pruning be enough?

Be cautious if someone recommends removal without explaining why. You should understand the reason, especially if the tree is large or well established. In many cases, a skilled arborist can reduce risk with selective pruning rather than removal.

6) What exactly is included in the quote?

Quotes for arborist work can vary a lot because the scope may include climbing, traffic management, traffic cones, stump grinding, green waste removal, mulch, and site clean-up. Always make sure you’re comparing similar jobs.

Ask for a written quote that clearly states:

• which trees or branches are included
• whether pruning, shaping, deadwood removal or full removal is proposed
• whether stump grinding is included
• whether chipped material, logs and leaves will be removed or left on site
• whether the site will be left tidy, including sweeping paths and driveways
• whether GST is included

Here’s a quick comparison table to help you review quotes:

If a quote is much lower than the others, ask what has been left out. It may not include waste removal, stump grinding, council checks, or post-job cleanup.

7) What will the job cost, and what could change the price?

Arborist pricing in New Zealand depends on tree height, access, risk, waste volume, equipment, and whether the tree is near buildings or power lines. Rather than chasing the cheapest option, ask how they arrived at the price.

Ask:

• Is the quote fixed or estimated?
• What could make the final cost higher?
• Will you charge extra if access is more difficult than expected?
• Are there additional charges for stump grinding, traffic management or after-hours work?

For large or complex jobs, it’s normal for a final quote to depend on a site visit. Just make sure the quote is specific enough that there are no surprises.

If you need several trees worked on, ask whether there is a better rate for bundling the jobs together. Many homeowners can save by combining tree pruning and removal in one visit.

8) How will you keep the work safe?

Tree work often involves chainsaws, climbing, rigging and falling timber, so safety should be front and centre.

Ask:

• What safety procedures do you follow on site?
• Do you use ropes, rigging or an elevated work platform where appropriate?
• How do you manage falling branches and debris?
• What happens if weather conditions change?
• Do you have a plan if power lines are nearby?

If the tree is close to overhead power lines, the arborist should explain how they’ll manage the hazard and whether specialist requirements apply. In some cases, work near lines may need coordination with the local lines company or a suitably trained contractor. Never assume any tree worker can safely cut near live lines.

Ask about exclusion zones for children, pets and neighbours. If the crew needs to block part of a driveway, footpath or street frontage, clarify who will arrange any required traffic control.

9) What is your timeline, and when can you start?

Tree work is often seasonal. In New Zealand, spring and summer can be busy as homeowners sort out pruning after winter storms or before summer growth, while autumn and winter can also fill quickly as people deal with leaf drop, storm damage and clearance issues.

Ask:

• When can you inspect the job?
• How soon could you start?
• How long will the work take?
• Will weather delay the job?
• If the tree is urgent, do you offer emergency callouts?

For storm-damaged trees, fast response matters, but so does making the site safe. A good arborist should tell you whether the tree is an immediate hazard or whether it can wait for a planned visit.

10) Do you offer any guarantee or follow-up support?

Tree work is not always something that comes with a formal warranty, especially because trees are living organisms and weather conditions change. Still, it’s worth asking what support they provide after the job.

Ask:

• If I’m unhappy with the finish, what happens?
• Do you guarantee your workmanship?
• Will you return if a branch was missed or a cleanup issue remains?
• Can you provide advice on aftercare, watering or monitoring for stressed trees?

Be realistic here: no arborist can guarantee how a tree will respond long term to pruning or removal of nearby trees. But they should stand behind the quality of their work and be willing to fix genuine issues promptly.

11) Can you provide references or recent examples of similar work?

References are useful because tree work is highly visual and site-specific. Good arborists should be able to show recent examples or provide contactable references, subject to client permission.

Ask:

• Can you show photos of similar jobs?
• Do you have recent customer references?
• Have you worked on properties like mine, such as small sections, steep sites or suburban backyards?

Look for evidence of neat pruning cuts, careful site protection and tidy cleanup rather than just dramatic before-and-after photos of large removals.

12) What should I do before the crew arrives?

A professional arborist should tell you how to prepare the property. This reduces delays and helps the crew work safely.

Before the job, ask whether you should:

• move cars, trailers and outdoor furniture
• keep children and pets inside
• clear access to gates, driveways and side paths
• let neighbours know if branches or equipment may affect shared boundaries
• mark irrigation lines, septic areas or underground services if relevant

If the work involves stump grinding or planting replacements, ask what happens next and whether the area needs time to settle before replanting or re-laying lawn.

Final checklist before you hire

Before you confirm, make sure you can tick off these basics:

• You have at least two or three written quotes.
• The scope of work is clear and specific.
• Insurance details have been confirmed.
• The arborist has explained any council or property restrictions.
• Cleanup, waste removal and stump grinding are clearly itemised.
• The timeline makes sense for the season and your urgency.
• You feel comfortable with the crew’s safety approach and communication.

The right arborist will welcome your questions. In fact, a clear, detailed answer is often the best sign that you’ve found someone who takes tree care seriously and will treat your property with respect.