Overhead vs Underground Power in Sydney's Inner West: Which Is Right for Your Property?

Overhead or underground power: which is better for an Inner West property? Overhead power is cheaper to install and quicker to repair, while underground power is far better protected from storms, falling branches and possums but costs more upfront because it needs trenching or boring. For most Inner West homes the right answer depends on your street supply, how far the cable has to travel, the trees around the service line, and whether you're already renovating.

⚡ Quick Answers: Overhead vs Underground Power

• Which is cheaper? Overhead, in almost every case. Underground adds trenching or boring, conduit, pits and ground restoration.
• Which is more reliable in storms? Underground. There's no exposed service line for branches, wind or possums to damage.
• Which is easier to repair? Overhead. Faults are visible and quick to access, while underground faults take longer to locate.
• Can I go underground if my street is overhead? Usually yes, via an underground service run from the street pole, subject to distributor approval.
• Who can do the work? Any change to the service line or connection point is Level 2 ASP work, not standard electrical work.
• Does it need council approval? Work on private land usually doesn't, but anything crossing the footpath or road needs council road opening approval.

1. What "overhead" and "underground" actually mean for your property

Most Inner West streets are still supplied by an overhead network, with an aerial service line running from the street pole to a point of attachment on your house, or to a private pole first if the house sits well back from the street. An underground service replaces that aerial line with cable in conduit, either running from a street pillar where the street itself is underground, or dropping down the street pole and travelling underground to your meter position. The street network and your own service are separate decisions: you can have an underground service on an overhead street.

2. Cost: why underground costs more upfront

An overhead service needs a bracket or point of attachment, the service line, and sometimes a private pole. An underground service needs a trench or directional bore, heavy duty conduit at the required depth, the consumer mains cable itself, any pits or pillars, and restoration of whatever was dug through, which on an Inner West terrace is often a tiled path, a concrete driveway or a heritage front garden. Long runs, road crossings and hard rock all push the cost up. Overhead is the cheaper install; underground is the bigger upfront investment that usually pays back in lower maintenance and fewer outages.

3. Reliability: storms, trees and possums

The Inner West's mature street trees, Moreton Bay figs and plane trees are a big part of its character, and a big reason overhead services come down. Branches through the service line, possums bridging conductors and high vehicles snagging low lines in rear lanes are some of the most common callouts we get after storms. An underground service takes all of that off the table. If your service line runs through a tree canopy or across a rear lane, that alone can be a strong reason to go underground. Our guide to possum guards on power lines covers the lower cost fix if you're staying overhead.

4. Repairs and maintenance

Overhead faults are usually visible, so they're quick to find and repair. Underground cables fail far less often, but when they do, locating the fault and digging to it takes longer. Overhead services also carry ongoing responsibilities: keeping vegetation clear of the service line, maintaining any private pole, and meeting the ground clearances in the Service and Installation Rules. Underground services mostly just need the cable route kept clear of new excavation, which is why marking the route on your property plans matters.

5. Looks, heritage and renovations

A lot of Inner West owners choose underground for the frontage alone: no service line across the facade of a restored terrace, no private pole in the front garden. In heritage conservation areas, removing an aerial service is usually viewed favourably, though any trenching near heritage fabric still needs care. If you're already digging up a driveway, adding a second storey or relocating the meter, it's the cheapest time to go underground because much of the excavation and restoration is already happening. See our guide to electrical work on heritage-listed Inner West homes for that side of it.

6. When overhead is still the sensible choice

Overhead remains the practical option where the cable route would cross a neighbour's land without an easement, where there's no way to trench without major demolition, where the run is long and rocky, or where the existing overhead service is in good condition and simply doesn't need touching. A modern, correctly tensioned overhead service with the right clearances is perfectly safe and compliant. The question is value and risk, not safety.

7. When underground usually makes more sense

• Your private power pole is ageing or has a defect notice.
• The service line runs through trees or across a rear lane with truck access.
• You're renovating and the ground is already being opened up.
• A second storey or extension would put the service line too close to the new building.
• You want to remove a private pole permanently rather than keep replacing it.

If you're leaning towards underground, our step by step guide to what's involved in converting overhead power to underground walks through the process.

Why this is Level 2 ASP work

Installing, altering or converting a service line, working at the connection point on the street pole or pillar, and connecting consumer mains to the network all fall under Level 2 ASP accreditation in NSW. A standard licensed electrician can wire your switchboard and circuits, but the network side needs a Level 2 ASP who notifies the distributor, lodges the Notification of Service Work and certifies the finished installation. Our guide to standard electrician vs Level 2 ASP work explains the difference.

How High Demand Electrical helps

We're a licensed Level 2 ASP team (Licence 397193C) working across the Inner West, from Balmain and Rozelle to Marrickville, Dulwich Hill and Ashfield. We'll look at your street supply, your cable route, the trees and the condition of your existing service, and give you an honest comparison of both options, including when staying overhead is the smarter spend.

Overhead vs Underground Power FAQs (Inner West)

Is underground power safer than overhead power?

Underground power removes the exposed service line, so it's far less likely to be brought down by storms, falling branches, possums or high vehicles. Both options are safe when installed and maintained to AS/NZS 3000 and the NSW Service and Installation Rules.

Is underground power more expensive than overhead?

Yes, upfront. Underground power involves trenching or boring, conduit, pits and restoration of driveways or paths, so it usually costs more than a like-for-like overhead service. Overhead is cheaper to install but can cost more over time in tree trimming, repairs and pole maintenance.

Can I choose underground power if my street is overhead?

Usually yes. A Level 2 ASP can run an underground service from the street pole down into a trench to your property, as long as the distributor approves the connection point and there's a practical cable route.

Which option is quicker to repair after a fault?

Overhead faults are usually easier to find and fix because the cable is visible. Underground faults are rarer but can take longer to locate and repair because the cable is buried.

Does underground power add value to a property?

Many buyers see a cleaner frontage, no private pole to maintain and better storm resilience as a positive, but the value added varies by property and isn't guaranteed.

Get Advice on Your Power Supply

Not sure whether to stay overhead or go underground? Get an underground service mains quote, compare it with an overhead service mains upgrade, or call 0402 559 777. Every recommendation starts with a proper look at your site, not a guess over the phone.