Removing Trees Near Power Lines in Auckland

This is the one area of tree work where there is no nuance and no DIY option. Electricity arcs — you do not have to touch a conductor to be killed by it — and green wood, wet bark and damp ground all conduct readily. People die doing this in New Zealand. If a tree is already on a line, or a line is down, call the network operator or 111 first; only once the line is made safe does it become a job for emergency tree removal.

How close can you work to a power line?

If you are not a trained, approved line-clearance worker, keep yourself, your tools and every branch at least 4 metres from any overhead network line. Vector, which runs most of Auckland's network, treats that 4-metre space as a professional-only zone: only approved utility arborists may trim inside it. Owners and unapproved arborists can trim only when every part of the tree is 4 metres or more from the line.

That figure lines up with the national code. The New Zealand Electrical Code of Practice for Electrical Safe Distances, NZECP 34:2001 sets a minimum approach distance of 4 metres for people who are not competent electrical workers near live parts on circuits up to 110 kV, and the same 4 metres for mobile plant such as an elevated work platform or crane, unless the line owner gives written consent to work closer. WorkSafe publishes the electrical codes of practice and guidance on working near electricity. Vector also warns owners not to fell a tree, or drop a branch, where its length could reach the line.

Why distance alone is not the whole story

• Arcing. High-voltage electricity can jump an air gap. Contact is not required.
• Conductive material. Living wood, wet branches and sap conduct. A branch is not an insulator.
• Line movement. Conductors swing in wind and sag in heat. The gap you measured is not fixed.
• Unpredictable fall. A cut branch rarely goes exactly where expected, particularly under tension.
• Step potential. Where a line contacts the ground, voltage gradients radiate outward through the soil. You can be injured walking near the contact point without touching anything.

The zones around a power line

The Electricity (Hazards from Trees) Regulations 2003 draw a set of zones around each line. The growth limit zone is the space trees must stay out of. Around it sit the cut-back zone (1 metre further out), the hazard warning notice zone (2 metres further out) and, since the 23 July 2026 amendment, a treefall hazard zone reaching 24 metres beyond the growth limit zone. The old single “notice zone” no longer exists.

For the lines most Auckland homes live beside, the distances work out like this (the zone widths come from the regulations; Vector publishes the same figures):

Higher-voltage lines have larger zones, and some must be kept clear all the way to the sky. Outside urban areas there is also a low-height planting zone, covered under planting below. These zones decide when a notice can be sent; they are not safe working distances. The 4-metre rule above still applies to anyone who is not an approved line-clearance arborist.

Who is responsible for trimming trees near power lines in NZ?

The tree owner is responsible for keeping a tree out of the growth limit zone around a network line. When a tree gets into that zone, the lines company must give the owner a cut or trim notice, and for the first notice on that tree the lines company meets the reasonable cost of cutting it back. After that first cut, keeping the tree clear is the owner's responsibility and cost.

A cut or trim notice sets a deadline (from 10 to 45 working days, depending on the tree and the notice history), and the owner must tell the lines company at least 3 working days before the work is done. Two escape valves exist. A no-interest tree notice tells the lines company you have no interest in a tree that self-seeded, or that was planted in the reasonable belief it would never reach the lines; it must be given within 10 working days of a cut or trim notice. A dispensation lets a tree stay closer than the cut-back zone if the lines company agrees; apply within 5 working days of a cut or trim notice. Disputes can go to the tree arbitrator.

Ignoring a cut or trim notice is an offence: fines of up to $10,000, plus up to $500 a day while it continues. If the lines company then has to make the tree safe in an emergency, the owner who ignored the notice can be charged for that work.

If you receive a notice, do not ignore it and do not deal with it yourself. Contact your lines company and use an approved contractor. Pruning the parts of a tree that are more than 4 metres from the line is ordinary tree trimming and pruning. Anything closer is for the network’s approved contractors only — Vector calls it the professional-only zone.

Can a lines company make me remove a tree?

Yes, under the 2026 amendment, but not yet. A lines company can assess a tree within the treefall hazard zone as a high or moderate treefall hazard, based on written advice from a qualified arborist. From 23 July 2028 it can then give a treefall hazard notice, and the owner must have the tree removed within 25 working days (high) or 45 working days (moderate). The lines company meets the reasonable removal cost.

The details that matter if you get one:

• Assessments can start now. The assessment rules took effect on 23 July 2026; the notices themselves cannot be issued before 23 July 2028.
• The test is likelihood and impact: how likely the tree is to fall on the line (signs it may fall within 12 months, instability, an exposed or unstable site) and how serious that would be for supply or public safety.
• Who pays: the lines company, whether the owner arranges the removal or the lines company does it. It is not required to pay if the owner refused it entry to remove the tree, if the cost was already covered by an agreement, or for certain rural trees planted against the low-height planting rule.
• Disagreeing: the owner can ask the tree arbitrator to review the hazard rating, but only within 10 working days of receiving the notice.
• Notice and offence: the owner must tell the lines company at least 3 days before the removal, and failing to remove the tree in time without a reasonable excuse is an offence carrying a fine of up to $10,000.

Removing a tree near lines is specialist work in its own right: only network-approved crews work within the approach distances, and the line usually has to be isolated or covered first. If you are facing one, see removing a large tree near lines.

The line running to your own house

This one catches people out. The service line — the single line running from the network to your property — is not covered by the tree regulations at all. Vector generally owns the network up to the point of supply, usually a fuse at your boundary or on the nearest pole; the line from there to your meter is owned by the property owner, and Vector's line-ownership guide asks owners to keep trees away from it.

It is also the line most often ignored, because it is lower, thinner and looks less serious than the lines on the poles. It is not less dangerous. It carries enough voltage to kill, it frequently runs directly through the canopy of a garden tree, and it is exactly the line people prune around casually.

If a tree you want removed has a service line running through it — extremely common in older suburbs like Epsom, Onehunga and Papatoetoe — the line needs to be de-energised or covered before work starts. Tell whoever is quoting, because it affects both the method and the price.

Who is responsible for council trees and berm trees near lines?

Trees on council land, including street and berm trees, are Auckland Council's to manage, not the neighbouring owner's. The council prunes public trees away from power lines through a regular line-clearance programme, using its own utility tree contractor. If a council tree is growing into a line, report it to Auckland Council on 09 301 0101 rather than cutting it; call 111 if there is an immediate threat to life or property.

Trees growing from private property remain the property owner's responsibility, and the council's advice is to contact Vector when your own tree is getting close to a line.

How the work actually gets done

1. Identify the line and its voltage. A service line to a house and a distribution line on a pole require different approaches.
2. Contact the network operator. They advise what is required and arrange a shutdown or line covers. Where you are working under a cut or trim notice, the lines company must be told at least 3 working days before the work.
3. Book the outage window. Shutdowns are scheduled, not instant. This is the main reason these jobs take longer to organise.
4. Confirm isolation on the day. The line is confirmed de-energised or covered before anyone approaches.
5. Do the work with clearance maintained. Sections sized and rigged so nothing swings toward the line.
6. Confirm clear before re-energising.

Expect this to add both time and cost — as an indicative range, $500 to $1,500 incl. GST for a shutdown or line cover, depending on the operator and the arrangement, plus scheduling delay. It is not padding; it is what the work requires.

Storm situations

If a tree has come down onto a line, or a line has come down onto a tree:

• Stay at least 10 metres away and keep everyone else back.
• Assume every line is live, even one lying on the ground doing nothing. Networks can re-energise automatically.
• Do not touch anything in contact with the line — the tree, a fence it is resting on, a vehicle.
• If a line is on your vehicle and you are inside it, stay inside unless there is fire. Call for help.
• Call the network operator or 111 first. Before your insurer, before an arborist, before anything.
• Keep clear of puddles and wet ground near the contact point.

No arborist can start work until the network operator has made the line safe. Calling us first does not speed anything up — call them. See our storm damage guide and emergency tree removal.

What to plant instead

The cheapest solution is not planting the problem in the first place. Under and near overhead lines, choose species whose mature height stays well clear — generally under about 4 metres for a suburban line, and further from higher-voltage runs.

Reasonable options for Auckland conditions include kōwhai, karo, corokia, hebe, pittosporum cultivars bred for compact size, and smaller ornamental cultivars generally. Avoid gum, poplar, liquidambar, plane, macrocarpa and anything else that will comfortably clear 15 metres.

On rural and lifestyle land outside urban areas, a new rule applies from 23 July 2027: within the low-height planting zone, which runs up to 24 metres either side of a line, you should only plant a tree if you reasonably believe its mature height will be less than its distance from the line (shelter belts are an exception). A tree planted against that rule loses the free first cut and the no-interest and dispensation options.

Two practical rules: plant beyond the eventual canopy spread rather than just beyond the trunk position, and check with your lines company before planting anything substantial near a network line. Both are easier than removing a mature tree from under a conductor twenty years later.

If a tree near a line needs work, we will tell you what the network operator requires and arrange it as part of the job. Request an assessment, or see large and dangerous tree removal.

Regulation details checked against the Electricity (Hazards from Trees) Regulations 2003 as at 23 July 2026, and Vector's trees and lines guidance, in October 2026. General guidance only. Always follow your network operator's requirements and the current version of NZECP 34. Never approach a line on the basis of information from a website. See our disclaimer.

Frequently asked questions