Residential Electrical Rewiring Sydney: The Complete Guide

Does your home actually need a full rewire, or will repairs do? If your property was built before 1980 and has never been rewired, or you're seeing tripping breakers, warm power points or a lingering burning smell, the safe assumption is that the wiring is approaching the end of its service life. A licensed electrician's inspection is the only reliable way to know for certain, and it's the first step before any quote.

⚡ Quick Answers: Residential Rewiring

• What are the warning signs? Breakers or safety switches tripping without an obvious cause, warm or discoloured power points, a burning smell, crackling from the switchboard, or a home that still has a ceramic fuse box.
• Do I need a full rewire or just repairs? It depends on the age, condition and type of the existing wiring. An inspection is the only reliable way to tell.
• Does a rewire include a switchboard upgrade? In most cases yes, since new circuits need modern breakers and safety switches to meet AS/NZS 3000.
• How long does it take? A small unit is often one to two days; a larger four or five bedroom home typically runs three to five days.
• Do I need to move out? Usually not. Key areas like the kitchen and bathroom are kept powered overnight wherever possible.

👉 Book a wiring assessment if any of these signs sound familiar.

1. Signs your home needs rewiring

A handful of warning signs come up again and again in older Sydney homes: breakers or safety switches that keep tripping without an obvious cause, flickering or dimming lights when other appliances run, discoloured or warm power points, a burning smell near the switchboard, crackling or buzzing from a wall or outlet, and a home still fitted with a ceramic fuse box rather than modern circuit breakers. Any one of these on its own is worth an inspection; more than one, especially in a pre 1980s property, points strongly towards a full rewire rather than a patch repair.

2. Why old wiring is a genuine safety issue, not just an inconvenience

Most homes built before the 1980s were wired with rubber insulated cable that is now well past its expected service life. That insulation becomes brittle with age, cracks and crumbles, and the risk of arcing, shorts and fire rises accordingly. Beyond the fire risk, older cabling was never designed for the loads a modern household places on it: EV chargers, ducted air conditioning, induction cooktops and a full suite of appliances running at once. That mismatch shows up as tripping breakers, warm outlets and general unreliability long before anything fails outright.

3. What a compliant rewire actually involves

AS/NZS 3000:2018 (Clause 2.6.3.2.2) requires a safety switch, rated at no more than 30mA, protecting every final subcircuit in a domestic installation. A full rewire is the point at which every circuit in the home is brought up to that standard, with cable sized correctly for the load it carries, compliant earthing throughout, and a switchboard capable of carrying it all safely. This is standard licensed electrical work, distinct from the network side Level 2 ASPs handle, unless the job also touches your consumer mains or metering.

4. The process, step by step

A properly run rewire follows a predictable sequence: an initial inspection of the existing wiring, switchboard and earthing, followed by a written quote; any necessary council or paperwork lodged before work starts; the rewire itself carried out room by room to limit how much of the home is without power at any one time; a switchboard upgrade in most cases to carry the new circuits with modern protection; and finally, testing of every circuit before a Certificate of Compliance is issued. That certificate is the document you'll need for insurance, sale or council records, so keep it on file.

5. How long it takes and what it typically costs

Timing depends on the size of the home and the complexity of the existing wiring: a one to two bedroom unit is often a one to two day job, a three bedroom house typically runs two to four days, and a larger four or five bedroom home can take three to five days, with heritage or hardwall construction adding time on top. Cost varies just as much, from a partial rewire of a single zone or circuit group through to a full rewire of a larger home, and a switchboard upgrade is often bundled into the same price. These are indicative ranges only; the only way to get an accurate figure is a site assessment, and we provide fixed price quotes wherever possible.

How High Demand Electrical helps

We're a licensed local team, not a call centre, and we rewire homes across Sydney from Federation era terraces to modern builds. Every job starts with an honest assessment, a clear written quote, and work carried out room by room to keep disruption to a minimum. If you're not sure whether your home needs a full rewire or just a repair, our fault finding guide covers what a diagnostic visit looks like, and if you're buying a property, our pre-purchase inspection service will tell you exactly what you're taking on.

Residential Rewiring FAQs (Sydney)

Do I need to move out while my home is being rewired?

In most cases, no. We plan the job so that key areas like the kitchen and main bathroom are never left without power overnight, and we'll talk you through the schedule before work begins.

Is a switchboard upgrade included in a rewire?

Usually yes. A full rewire typically needs a switchboard upgrade to carry the new circuits and install modern safety switches and circuit breakers as AS/NZS 3000 requires. See our switchboard upgrade guide for what that involves on its own.

Can I rewire just part of my house?

Yes. A partial rewire of a single zone, a kitchen renovation for example, is a common and cost-effective option, provided the new work meets current standards even if the rest of the house is left unchanged.

How do I know if I need a full rewire or just repairs?

It depends on the age, condition and type of your existing wiring. If your home was built before 1980 and has never been rewired, book an inspection. Our electricians will give you an honest assessment and recommend the most cost-effective path.

Not sure whether your wiring needs a full rewire or a repair? Book a wiring assessment with High Demand Electrical, or call 0402 559 777. Every job starts with a site visit so scope and pricing are confirmed before work begins.