Does Your Inner West Semi Share One Power Line and Point of Attachment With Next Door?

Does your Inner West semi share one power line and point of attachment with next door? On a lot of older terraces and semis it does, with a single overhead service feeding both halves of the building from one shared attachment point. It is not dangerous on its own, but it can get in the way the moment either owner wants to upgrade, sell separately, or add a load the shared arrangement was never sized for.

⚡ Quick Answers: Shared Points of Attachment in the Inner West

• What is a point of attachment? The spot on the building, or on a pole, where the network's overhead service physically connects to your property, before it runs on to your switchboard.
• Can two separately owned semis share one point of attachment? Yes, it is common on older stock, though each half usually still has its own meter and switchboard downstream of it.
• Is a shared point of attachment the same issue as a shared switchboard? No. A shared switchboard is a downstream metering and isolation issue, while a shared point of attachment is the upstream overhead connection itself, and they need separate fixes.
• Can one owner force a separation? Not unilaterally. It usually needs agreement between both owners and an application to the network, since the service crosses or touches both properties.
• Does getting your own point of attachment always mean a new pole? No, only where there is genuinely no suitable spot left on the building for a second attachment, which is a specific, checkable rule rather than a given.
• Who do I apply to for a separate connection? Ausgrid or Endeavour Energy, depending on which network area your Inner West property sits in.

1. How one service ended up feeding two homes

Plenty of Inner West terraces were built, or subdivided from a single larger house, well before current supply standards existed. It was common for the builder or an early owner to run one overhead service to a single point of attachment, then split the supply inside the building to feed both halves. Decades later, that original arrangement can still be sitting there even though the two halves have been under completely separate ownership for years.

On its own this is not an emergency. Plenty of these arrangements have run safely for a long time. The problem shows up later, when one owner wants to renovate, add an EV charger, go all electric, or simply sell with a clean, independent supply rather than one tied to the house next door.

2. Point of attachment rules under the Service and Installation Rules of NSW

The point of attachment, often shortened to POA, is defined under the Service and Installation Rules of NSW as the spot where the overhead service terminates on your premises, which is the first support point before anything runs on to your own wiring. Clause 3.7.1 sets out where it can sit: on the side of the building facing the distribution mains, with a minimum fixing height of 3 metres and a maximum of 6.7 metres above ground. It must also be positioned to avoid the service crossing a neighbour's property where that can reasonably be avoided.

For a pair of semis sharing one POA, this last point matters. If the existing attachment sits on one half of the building and effectively serves the other half through an internal run, that arrangement already involves one property's supply touching the other, which is exactly the situation the rules try to minimise wherever a cleaner option exists.

3. Why a shared point of attachment is not the same fix as a shared switchboard

It is worth being precise here, because the two problems look similar from the street but need different fixes. A shared switchboard, where both halves of a semi still draw from one set of isolation and metering equipment downstream of the point of attachment, is a metering and isolation issue covered under AS/NZS 3000 and addressed in our Inner West guide to whether your semi still shares a switchboard with next door. A shared point of attachment is the upstream overhead connection itself, the first physical link to the network, and fixing it means dealing with Ausgrid or Endeavour Energy directly rather than just rewiring your own switchboard.

In practice, separating a shared POA is usually the first step, and a proper switchboard split, as covered in High Demand Electrical's main Sydney guide to splitting a shared electrical supply in an older semi, follows once each half has its own independent connection to build from.

4. What separating a shared point of attachment actually involves

The first step is confirming exactly how the existing service is arranged, since not every semi with a shared history actually has a shared POA. Some already have two separate attachment points feeding two separate consumer mains runs, with only the switchboard genuinely shared further downstream. A site inspection by a Level 2 ASP settles this quickly.

Where the point of attachment genuinely is shared, the next step is working out whether a second POA can go on the other half of the building. Most Inner West terraces have enough wall area facing the street or lane to support this. A new overhead service is then applied for through the relevant distributor, the old shared arrangement is formally altered or disconnected, and each half ends up with its own independent connection running to its own consumer mains and, eventually, its own switchboard.

5. When a private pole becomes part of the conversation

Occasionally, usually on a rear lane block, a battleaxe style lot, or a terrace where there is genuinely no suitable wall space left for a second attachment, the answer is not a second POA on the building at all but a small private power pole instead. This is the same exception the Service and Installation Rules of NSW allow for any property without a workable point of attachment, and our colleagues at High Demand Electrical's dedicated pole site cover exactly how that attachment point is assessed in their guide to point of attachment rules for Sydney properties. It is the exception rather than the rule in the Inner West, but worth ruling in or out early rather than assuming it is needed.

6. Ausgrid or Endeavour Energy, and why it changes your application

Separating a shared point of attachment means applying to whichever distributor services your street, and the paperwork, notification timeframes and site requirements are not identical between the two. Before lodging anything, check your network area in seconds with our postcode checker so your application goes to the right distributor from the start rather than being redirected partway through.

Why it's Level 2 ASP work

Any work on the point of attachment, the overhead service, or the connection to the network sits outside standard domestic electrical licensing. A Level 2 Accredited Service Provider is authorised to carry out and certify this work directly with Ausgrid or Endeavour Energy, including applying for a new connection point, which a standard electrician cannot do on their own, no matter how straightforward the job looks from the ground.

How High Demand Electrical helps

High Demand Electrical is one of Sydney's most trusted Level 2 ASPs for exactly this kind of older terrace and semi work across the Inner West. We start with a proper site assessment of the existing point of attachment, confirm whether a second attachment point is achievable on the building or whether a private pole is genuinely needed, then handle the distributor application, the new overhead service installation, and any required disconnection and reconnection of the old shared arrangement. We are a licensed local team, not a call centre, and we work with Inner West owners, strata committees and neighbouring pairs of owners who need to coordinate a separation together.

Once your point of attachment is independent, our team can also take care of the switchboard upgrade that usually follows, so the whole supply, not just the overhead connection, ends up genuinely separate.

Shared Point of Attachment FAQs (Sydney)

How do I find out if my semi has a shared point of attachment?

A Level 2 ASP can trace the service visually from the street and confirm it during a site visit, usually as part of a broader Level 2 electrician assessment.

Do both owners have to agree before separating a shared connection?

In almost all cases, yes, since the existing service touches both properties and the distributor will want confirmation from whoever is affected before altering or disconnecting it.

Will separating the point of attachment disrupt power to either home?

There is usually a short, planned outage while the new connection is installed and the old one is disconnected and reconnected, which your Level 2 ASP coordinates with the distributor in advance.

Does this affect home insurance or a future sale?

An independent, properly documented connection generally makes a property easier to sell or insure on its own merits, since it removes any ambiguity about shared infrastructure with the neighbouring title.

Is this the same process as a new build or a knockdown rebuild?

No, a new build applies for a fresh connection from scratch. This is specifically about separating an existing shared arrangement on an already built pair of semis, which involves additional coordination that a brand new connection does not.

Get Your Point of Attachment Assessed

If your Inner West semi shares one power line and point of attachment with next door, get a consumer mains and connection quote from High Demand Electrical. Call 0402 808 808 to talk through your situation. Every job needs a site assessment of both properties before scope or pricing can be confirmed, since the existing arrangement and available wall space both affect what is possible.