Electrician for heritage and large-block North Shore homes

Wahroonga, Killara, Lindfield, Mosman and Castlecrag all have the same problem hiding behind original picture rails: wiring that was never meant to last a century.

Rubber, VIR (vulcanised india rubber) and cotton-sheathed cable was standard until the 1960s. The insulation dries out, cracks and loses its rating long before anyone notices, because it usually still conducts — right up until it doesn't. Ceramic rewireable fuse boards are common behind that, offering no real fault protection and no path to add a safety switch without replacing the board. Meter panels backed with asbestos sheeting turn up constantly in pre-1990 homes and need licensed removal, not a standard swap.

Then there's the heritage overlay itself. A property in a conservation area, or a listed item, can have real constraints on what's visible from the street — a new meter box or switchboard sometimes needs a heritage-sympathetic location or finish, and council will occasionally have a view on it. We work with that rather than against it: routing new cabling through existing risers and roof space, and keeping visible fittings in character, so the upgrade doesn't turn into a fight with council.

A lot of the leafiest streets on the Upper North Shore — Lindfield, Killara, Roseville Chase — still run overhead consumer mains through established tree canopy. Two problems come with that: the line goes down in a storm, and ageing or damaged overhead mains attract Ausgrid defect notices that then have to be actioned on a deadline.

Undergrounding your own service line — the cable from the point of attachment to your meter, not a whole-street council scheme — is Level 2 ASP (Accredited Service Provider) work. Indicative cost for the cable itself runs $80–$180 per metre, and a full private job — trenching, conduit, the new underground service and reinstating the overhead connection point — typically lands at $3,000–$12,000+ depending on distance and access. It's a common heritage-conservation-area choice too: no more overhead line crossing a period streetscape.

Three phase isn't just an acreage thing. A large North Shore home with a pool, ducted air conditioning, an EV charger and a battery can push past what a single phase supply comfortably carries — and it's a genuinely common combination on the bigger blocks around Ku-ring-gai and Hornsby Shire. Installed cost for bringing three phase to a property that doesn't have it, plus the board to suit, typically runs $6,500–$12,000+, depending on whether three phase mains already exist in the street.

St Ives, North Turramurra and anything backing onto Ku-ring-gai Chase or Lane Cove National Park sit in a bushfire-prone area, which means external electrical fittings — meter boxes, outdoor power points, switchgear, security lighting — need to be BAL-rated to suit the property's Bushfire Attack Level. It's a straightforward spec once it's identified; the risk is a standard-grade fitting going up because nobody checked the BAL rating first.

If your property sits well back from the street — common on the bigger blocks up here — the pole carrying power in from the road may be a private pole, meaning it's your responsibility to maintain and replace, not Ausgrid's. Ausgrid's own published indicative figures: a steel pole runs $3,000–$5,000, a large timber pole $7,500–$14,500, and up to $16,000 where the meter box needs replacing at the same time. This is Level 2 ASP work. See our full private power pole replacement cost guide for the detail.

The Upper North Shore was among the worst-hit areas in Sydney's November 2019 "mini-tornado" storms, with Gordon and Killara the worst affected of the roughly 25,000 homes that lost power that day. It wasn't a one-off — falling branches account for roughly two-thirds of storm-related faults on Ausgrid's network, and heavy tree canopy over an overhead service line is exactly the setup a lot of these suburbs have. See our guide on why North Shore homes lose power in storms for what that means for backup and vegetation clearance.