The Short Answer

Can You Get Your Overhead Power Lines Put Underground?

Yes, you can have the overhead power lines running to your Auckland home converted to an underground cable. The part most people don’t realise: the line from the network to your house (the service line) is usually yours, not Vector’s. Arranging the conversion and paying for it sits with you, and the work on your side of the connection is your electrician’s job. Vector handles the network end, disconnecting the old overhead service and livening the new underground one at the point of supply. A typical residential conversion starts with a site assessment and a beforeUdig cable check, then the trench goes in, the new cable gets ducted and inspected, and Vector reconnects you. Street poles and the lines along your road are a separate story. Those belong to Vector, and burying them is their programme, not your project.

Ownership

Who Owns The Power Lines Running To My House In Auckland?

Walk the line from the street to your switchboard and the ownership changes partway along. Vector owns the network. Street poles, the lines along your road, the local transformer. From the point of supply onward, it’s yours. For most Auckland homes with overhead supply, that means the span from the network to your roof or private pole, plus the pole itself if you have one. Everything from there to the switchboard is yours too. You own it and you maintain it. Burying it is your call, and your cost.

This catches a lot of people out. We meet homeowners in West Auckland every month who assumed Vector would fix a sagging service line or a leaning pole, then discovered the asset was theirs. The flip side is freedom: because the service line is yours, you don’t have to wait for anyone’s programme to get rid of it. (Street-side undergrounding does happen, but through Entrust’s funded programme with Vector, street by street, on their schedule.)

Feasibility

Can Overhead Power Lines Be Converted To Underground?

Almost always, yes. Any change to the connection point counts as a permanent change to Vector equipment, so the conversion runs as a joint effort: your electrician designs and builds the underground run on your property, and Vector alters the network end, which usually means removing the overhead span and connecting the new cable. If you’ve got a private power pole in the middle of the lawn, the conversion is usually the moment it goes too.

Where do we most often recommend it? Long rural driveways out our way in Waitakere and Kumeu, where the line runs through trees and every big storm is a lottery. Homes about to start a renovation or landscaping also make the shortlist, because the digger is already on site and the trench becomes nearly free effort. So does any place where the overhead span hangs low over a driveway that trucks and boats pass under.

The Process

What Does Converting To Underground Power Involve, Step By Step?

Here’s the sequence we run on a residential conversion:

1. Assessment. Confirm the route and the switchboard condition, and decide whether mains capacity is worth upgrading while the trench is open (it usually is).
2. Cable location. A free beforeUdig check maps every existing underground service on the route before anyone digs.
3. Application to Vector. The change to the connection point gets lodged, and Vector schedules the network-side work.
4. Trenching and ducting. The trench gets dug, by us, your digger operator, or you if you’re keen on the exercise. The duct goes in first. Cable next, bedded properly, with warning tape above it. All the electrical work is ours; the digging is the only part that isn’t.
5. Inspection and connection. The new mains get inspected and certified. Vector disconnects the overhead span and livens the underground supply.
6. Removal. The old line comes down, and the private pole with it if you’re converting away from one.

Most of the disruption is groundworks. The actual power switchover is typically a single planned interruption on the day.

Consents

Do I Need Consent From Auckland Council Or Vector?

Sometimes, and it depends entirely on where the trench goes. Inside your boundary, no council consent is needed for the trenching itself. The moment the route crosses the footpath, berm or road, you’re in the road corridor, and Auckland Transport requires a Corridor Access Request before anyone digs. Working close to Vector’s live lines has its own rule: within four metres, you need a close approach consent under NZECP 34 before work starts. And if the only sensible cable route runs across a neighbour’s land, you’ll need a registered easement, which is a lawyer conversation before it’s an electrician one. We handle the Vector application and consents as part of the job. The easement is the one piece you’d drive yourself.

Depth And Protection

How Deep Do Underground Power Cables Need To Be Buried In NZ?

Deep enough that a spade never finds them. Under AS/NZS 3000 as applied in NZ practice, residential power cable runs with at least 500 mm of cover in gardens and lawns, and 600 mm is the common design standard for consumer mains. Under driveways and anywhere vehicles cross, the cable goes in heavy duty conduit with extra mechanical protection. Standard house wiring cable can’t just be buried either. Underground runs use ducting or cable rated for direct burial, bedded in sand. Orange warning tape goes in the trench above the cable so the next person who digs gets a warning before they get a surprise. Depths in the road berm are greater again, which is one of the reasons road-corridor trenching costs more effort than the run across your lawn.

Scope Drivers

What Affects How Big An Undergrounding Job Is?

Every conversion comes down to a handful of drivers, and you can read most of them standing in your own driveway:

• Trench length. A 15 metre suburban run and a 150 metre rural driveway are very different jobs.
• What the trench crosses. Lawn is easy. Concrete isn’t, and neither are mature tree roots. Both mean cutting, reinstatement or routing around.
• The road corridor. If the route leaves your boundary, add the Corridor Access Request, traffic management and deeper trenching.
• Sharing the trench. Fibre and other services can often go in the same trench with the right separation, which beats trenching twice. Worth deciding before the digger arrives, not after.
• What happens at each end. Removing a private pole extends the scope. So does upgrading an old switchboard or increasing mains capacity while the trench is open, and both are cheapest to do now rather than as separate jobs later.

Staging It

Not Ready To Trench Yet?

Fair enough. Plenty of owners stage it. If the driver is safety rather than looks, tiger tail sleeving marks low overhead spans as a short-term measure while you plan the conversion. Our tiger tails guide covers what they do and don’t do. In the meantime, keeping a private power pole maintained keeps the existing supply safe.

Thinking about burying the lines on your property? We assess service lines and private poles across Auckland from our base in Waitakere. We’ll handle the Vector application too, and run the whole conversion from trench to livening. Call Totally Amped Electrical on 021 770 696 or get in touch for an assessment.

Totally Amped Electrical, EWRB-registered electricians, West Auckland

General information only: this article describes typical Auckland residential electrical work and the rules as they stood at publication, not advice specific to your property. Requirements change, so confirm the current position with a licensed electrician before starting any work.

Who owns the power line from the street to my house?

In most Auckland homes, you do. Vector’s network stops at the point of supply; the service line, any private pole, and everything to the switchboard is the owner’s responsibility.

Can any overhead line be put underground?

Nearly all residential service lines can be. The conversion pairs your electrician’s work on the property with Vector altering the connection at the network end.

Do I need council consent to trench on my own property?

Not for trenching inside your boundary. A Corridor Access Request from Auckland Transport only comes into it when the route crosses the footpath, berm or road.

How deep does the cable go?

At least 500 mm of cover in gardens and lawns, with 600 mm the common standard for consumer mains, plus heavy duty conduit under driveways and warning tape above the run.

Is there a cheaper interim option than undergrounding?

If safety is the concern, tiger tail sleeving marks a low overhead span while you plan the full conversion. It’s a visibility measure, not insulation.