How Does a Tree Preservation Order Affect What You Can Do in NZ?

A tree preservation order (TPO) — or more commonly in New Zealand, a notable or protected tree schedule under a district plan — places legal restrictions on what you can do with certain trees on your property. If a tree on your land is protected, you may need resource consent before you prune, remove, or even carry out significant work near it. Getting this wrong can result in serious fines, so it pays to understand the rules before you pick up a chainsaw.

What Is a Tree Preservation Order in NZ?

In New Zealand, tree protection is primarily managed through district plans under the Resource Management Act 1991 (RMA). Local councils identify trees of significant ecological, historical, cultural, or amenity value and list them as notable trees or scheduled trees. Some councils also use the term "protected trees" in their district plan rules.

While the phrase "tree preservation order" is more commonly used in the UK, NZ homeowners often use it loosely to mean any council-imposed tree protection. The practical effect is the same: you cannot freely prune, lop, damage, or remove a protected tree without first checking with your council.

How Do You Know If Your Tree Is Protected?

The best starting point is your council's district plan or GIS mapping tool, which most councils publish online. Search for your property and look for any notable tree overlays or scheduled tree listings. You can also:

• Contact your local council's planning or resource consents team directly
• Check your Land Information Memorandum (LIM) report, which should note any tree protections on the property
• Ask a qualified arborist to review the site — they are familiar with local district plan rules and can advise you quickly

Protection can apply to trees on private land, road reserves, and public spaces alike.

What Activities Are Restricted?

If a tree is protected under your district plan, the following activities typically require resource consent or are outright prohibited without approval:

• Removal of the tree (felling, poisoning, ringbarking)
• Major pruning — this varies by council, but removing more than a defined percentage of the canopy (often 10–20%) usually triggers consent requirements
• Lopping or topping that would significantly alter the tree's form
• Root zone disturbance — excavation, trenching, or construction within the structural root zone (SRZ) or root protection area (RPA)
• Applying herbicides or other chemicals near the root zone
• Attaching structures, signs, or cables to the tree

Minor maintenance such as removing dead wood or small amounts of clearance pruning may be permitted without consent, but the threshold differs between councils — always confirm with yours first.

What Happens If You Breach a Tree Protection Rule?

Breaching a district plan rule relating to a protected tree is a serious matter under the RMA. Councils can issue enforcement notices, require remediation (such as replanting), and pursue fines of up to $300,000 for individuals or more for companies. In some cases, councils have required property owners to fund replacement planting of equivalent ecological value, which can be extremely costly.

Ignorance of the protection is not a defence, so always check before you act.

Applying for Resource Consent to Work on a Protected Tree

If you need to do work on a protected tree, you will generally need to apply for resource consent through your local council. The process typically involves:

1. A written application explaining the proposed works and the reasons
2. An arborist report from a qualified professional (often an ISA Certified Arborist or NZ Arboricultural Association member) assessing the tree's health, structure, and the impact of the proposed work
3. Council assessment — this may be non-notified (decided without public input) or, for significant trees, notified (open to submissions)
4. Payment of application fees, which vary by council

Consent may be granted with conditions, such as requiring the work to be carried out by a qualified arborist using approved methods.

Exemptions and Emergency Situations

Most district plans include exemptions for genuine emergencies — for example, if a protected tree has been severely damaged in a storm and poses an immediate risk to life or property. In these situations, you should:

• Contact your council as soon as practicable (many have after-hours lines)
• Document the hazard thoroughly with photographs before any work begins
• Engage a qualified arborist to carry out only the minimum work necessary to make the situation safe
• Follow up with a formal report to the council

Do not use "emergency" as a reason to remove a tree you simply want gone — councils investigate these claims carefully.

When to Call a Professional

Working on or near a protected tree is not a DIY job. A qualified arborist can assess the tree's condition, prepare the arborist report required for resource consent, and carry out any approved works safely and in compliance with district plan conditions. Look for arborists who hold recognised qualifications such as the NZ Certificate in Arboriculture or ISA Certified Arborist credentials.

For large trees, working at height, or using chainsaws, WorkSafe NZ sets out health and safety obligations that apply to anyone carrying out tree work — including homeowners. Engaging a professional protects both you and the tree.

You can find qualified, local arborists on tradedirectory.co.nz to help you navigate the consent process and carry out any approved work safely.

Sources & Further Reading

• MBIE Building Performance – Resource Management Act guidance
• BRANZ – Trees and building work
• WorkSafe NZ – Tree work health and safety
• Standards NZ – Relevant arboricultural standards
• Consumer NZ – Know your rights as a property owner