Rewiring is one of those jobs nobody wants but plenty of older homes eventually need. If your house still has its original wiring, you're probably wondering what you're in for. Here's an honest look at what rewiring costs in Sydney, what makes the price go up or down, and how to tell whether you actually need it.
The short answer on price
A full rewire of an average Sydney home commonly lands somewhere in the range of roughly $8,000 to $20,000 or more, and partial rewires obviously cost less. That's a wide range because 'rewiring a house' covers everything from updating a few problem circuits to replacing every cable, the switchboard and all the fittings in a large two-storey home.
The only way to get a real number is to have an electrician inspect the property, because so much depends on access and what's behind the walls. Treat any figure online — including this one — as a ballpark to set expectations, not a quote.
What drives the cost up or down
Size and layout matter most: more rooms, more circuits, more points, more cable. A single-storey home with accessible roof and subfloor space is far easier to rewire than a two-storey home with no access, where getting cables through walls is slow, careful work.
Whether the walls are open is the other big one. Rewiring during a renovation, when walls are already stripped back, is dramatically cheaper than rewiring a finished, lived-in home where every cable run means lifting floors or cutting and patching plaster.
The switchboard, the number of new powerpoints and lights you want, and any extras like data cabling or additional circuits all add to the total. Older homes sometimes reveal surprises once opened up, which is why a good electrician inspects before quoting.
Signs your home may need rewiring
Tell-tale signs include a switchboard with ceramic fuses or no safety switches, cloth or rubber-insulated cabling (common in homes wired mid-last-century), powerpoints that are scorched, warm or sparking, lights that flicker across the house, and frequent tripping that isn't down to one faulty appliance.
A persistent burning smell, or two-pin un-earthed outlets, are stronger signs. If your home is several decades old and has never been rewired, an electrical safety inspection is the sensible first step — it tells you whether you need a full rewire, a partial one, or just a switchboard upgrade.
How to keep the cost down
Time it with a renovation if you can — having walls open is the single biggest saving. Do it in stages if a full rewire isn't urgent: a switchboard upgrade and the worst circuits first, the rest later. And get a detailed, itemised quote so you can see what's essential versus optional.
Above all, don't be tempted to delay indefinitely or let anyone unlicensed touch it. Faulty old wiring is a genuine fire and shock risk, and unlicensed electrical work is illegal in NSW and will void your insurance.
Wondering whether your home needs rewiring? Blackwire can inspect it and give you a clear, itemised quote anywhere in Western Sydney.
This article is general information only. Pricing figures are indicative and vary by job. All electrical work in NSW must be carried out by a licensed electrician.
