Decision Guide • Property • Sydney
Electrical Check Before Buying a Sydney Home: What to Look For
Building inspections check the structure. Pest inspections check for termites. But very few buyers get a dedicated electrical inspection before exchanging contracts — and electrical faults are one of the most expensive surprises in Sydney’s older housing stock. Here’s what a licensed electrician checks, what common faults cost to fix, and how to use the findings in your negotiation.
Primary sources: NSW Fair Trading electrical trade licensing · SafeWork NSW electrical hazards.
Why Building Inspections Often Miss Electrical Faults
A standard pre-purchase building inspection covers structure, drainage, roofing, and visible defects. The inspector may note that the switchboard "appears old" or that "wiring was not tested" — but they don't open the switchboard, don't test circuits, and don't measure insulation resistance. That's because they're not licensed electricians. An electrical inspection is a separate, specialised assessment — and it catches the things that cost $2,000–$10,000 to fix after settlement.
What a Licensed Electrician Checks Before You Buy
- Switchboard age and condition — ceramic fuses, missing RCDs, burn marks, asbestos enclosure, capacity for future loads (solar, EV charger, aircon)
- Wiring type and condition — rubber-insulated cable (pre-1970), aluminium wiring, fabric-sheathed cable — all degradation-prone and expensive to replace
- RCD/safety switch presence and function — tested with a calibrated RCD tester, not just the button
- Earth system integrity — measured for continuity and resistance. A failed earth path means RCDs can't protect occupants
- Circuit loading — whether circuits are overloaded, undersized, or improperly shared
- Smoke alarm compliance — type (photoelectric required), age (10-year rule), placement, interconnection
- Visible hazards — exposed wiring, DIY modifications, non-compliant fittings, junction boxes without covers
- External supply condition — overhead service line, meter box, point of attachment — any visible damage or deterioration
Common Electrical Faults Found in Sydney's Older Properties
| Fault | Risk level | Typical fix cost |
|---|---|---|
| Ceramic fuse switchboard (no RCDs) | High — no shock protection | $1,800 – $3,500 (full board replacement) |
| Asbestos switchboard surround | Medium — stable unless disturbed | $1,000 – $3,000 (licensed removal) |
| Rubber-insulated wiring (pre-1965) | High — brittle, cracking insulation | $5,000 – $15,000 (partial or full rewire) |
| Aluminium wiring (1960s–70s) | Medium-High — oxidation, loose joints | $3,000 – $10,000 (remediation or rewire) |
| No earth connection or failed earth | Critical — RCDs cannot protect | $500 – $2,000 (earth stake + connection) |
| Non-compliant smoke alarms | Low-Medium — fix is straightforward | $300 – $800 (replacement + hardwiring) |
| DIY electrical modifications | Variable — depends on scope | $500 – $5,000 (rectification to code) |
What Does a Pre-Purchase Electrical Inspection Cost?
A dedicated pre-purchase electrical inspection by a licensed electrician costs approximately $250–$450 in Sydney, depending on the property size and age. This covers a full switchboard inspection, circuit testing, RCD testing, earth system measurement, and a written report with findings and estimated remediation costs. The inspection takes 1–2 hours on site.
Compare that to the average cost of undiscovered electrical faults: $3,000–$10,000. The inspection is one of the highest-ROI investments in the buying process.
What to Negotiate With the Vendor If Faults Are Found
Armed with a licensed electrician's report, you have three negotiation options:
- Request a price reduction equal to the estimated remediation cost. The vendor keeps the problem; you get a lower price and fix it post-settlement on your terms.
- Request the vendor fix the faults before settlement using their own licensed electrician. Less common and harder to enforce quality.
- Walk away if the remediation cost exceeds your budget or appetite. A $15,000 rewire on a $900,000 purchase may not matter. On a $500,000 first home, it's a dealbreaker worth knowing about before contracts exchange.
The inspection report is your leverage. Without it, you discover these costs after settlement when you have no negotiating position.
Frequently Asked Questions
How much does a pre-purchase electrical inspection cost in Sydney?
Approximately $250–$450 for a standard residential property, depending on size and age. This covers switchboard inspection, circuit testing, RCD testing, earth system measurement, and a written report with findings and estimated remediation costs.
Is a pre-purchase electrical inspection required in NSW?
Not legally required — but strongly recommended, especially for homes built before 1990. Building inspections typically don't cover electrical systems in depth. A dedicated electrical inspection catches faults that cost $2,000–$10,000 to fix after settlement.
What's the most expensive electrical fault found in older Sydney homes?
A full rewire for rubber-insulated or aluminium wiring can cost $5,000–$15,000 depending on the size of the home and how much of the wiring needs replacing. This is most common in pre-1970 Sydney homes that have never been updated.
Can I negotiate the price down based on electrical faults?
Yes — a licensed electrician's report with itemised remediation costs gives you concrete leverage. You can request a price reduction, ask the vendor to fix before settlement, or walk away if the cost exceeds your tolerance.
How long does a pre-purchase electrical inspection take?
1–2 hours on site for a standard residential property. The written report is typically delivered within 1–3 business days.
Should I get an electrical inspection for a new apartment?
For apartments built after 2010, electrical faults are uncommon. For older apartments (especially pre-1990 strata buildings), an inspection is worthwhile — older strata wiring, shared circuits, and aged switchboards are common findings.
Buying a Sydney home? Get an electrical inspection first.
A $300 inspection now can save you $10,000 after settlement. Our licensed team provides a written report with fault severity ratings and estimated costs — ready for your conveyancer.