Most homeowners only learn what their electrical system looks like the day something trips, smokes, or dies. The two big jobs — a switchboard upgrade and a full house rewire — are often confused and their prices differ by an order of magnitude. Here's how to tell which one you actually need.
Switchboard Upgrade Cost
| Scope | Typical Cost | Timeline |
|---|---|---|
| Fuse box → circuit breakers | $1,500–$2,500 | 4–6 hours |
| Add RCD / safety switches | $300–$500 | 1–2 hours |
| Full new switchboard (meter + breakers) | $2,000–$3,500 | 6–8 hours |
| Solar-ready switchboard upgrade | $2,500–$4,000 | 1 day |
| Single → three-phase supply | $2,500–$6,000+ | 1–2 days |
Full Rewire Cost (by home size)
| Home | Typical Cost | Timeline |
|---|---|---|
| 2-bedroom unit / apartment | $6,000–$12,000 | 3–5 days |
| 3-bedroom single-storey | $8,000–$15,000 | 5–7 days |
| 4-bedroom single-storey | $12,000–$18,000 | 7–10 days |
| 2-storey home | $14,000–$22,000 | 10–14 days |
| Heritage / double-brick / plaster ceilings | $18,000–$30,000+ | 14+ days |
When Each Job Is Needed
| Warning Sign | Switchboard Upgrade | Full Rewire |
|---|---|---|
| Ceramic fuse box (pre-1985) | ✓ | — only if cables also old |
| Adding solar / EV charger / pool heater | ✓ | — |
| No RCD safety switches on circuits | ✓ | — |
| Frequent circuit breaker trips | — first try | ✓ if wiring old |
| Black rubber-coated cables (VIR) | — | ✓ mandatory |
| Burn / plastic smells from outlets | — | ✓ urgent |
| Major renovation (>$50K) | ✓ minimum | ✓ recommended |
| Flickering lights across circuits | — investigate | ✓ usually |
Pros and Cons: Side by Side
Switchboard Upgrade
- Far cheaper — typically one-tenth the cost of a full rewire
- Fast — most jobs complete in a single day
- Brings home to current Australian safety standards (RCD / AS3000)
- Essential for adding solar, EV charging, induction cooking, ducted AC
- Power is only off for 4–8 hours
- Does not fix old or damaged cabling running through the walls
- Will not stop circuit trips caused by faulty wiring
- If cables are damaged, the new switchboard will keep tripping
- Not a substitute for a rewire in pre-1975 homes with original cabling
Full House Rewire
- Once-in-a-lifetime fix — new wiring lasts 40+ years
- Removes all legacy fire risks (VIR cables, porcelain fittings)
- Supports any future load — solar, EVs, heat pumps, all-electric home
- Adds real resale value to pre-1975 homes ($20,000–$50,000 typically)
- Opportunity to relocate outlets and improve lighting design
- Expensive — $8,000–$30,000 depending on home size and access
- Disruptive — walls and ceilings opened, some rooms without power
- Plaster patching and painting usually required afterwards
- Takes 5–14 days depending on home size
- Requires full compliance inspection and certificate of electrical safety
Which Should You Choose?
A switchboard upgrade alone is enough if:
- Your home was built after 1985 with modern TPS cable (white/grey plastic)
- You have an old fuse box but no other electrical issues
- You're adding solar, a new ducted AC, or an EV charger
- You want to add RCD safety switches (now mandatory on all circuits)
- Your home passes an electrical safety inspection apart from the board
A full rewire is necessary if:
- Your home was built before 1975 and still has original wiring
- Cables are black rubber-coated (TPS-VIR) and crumble when touched
- You have frequent circuit trips even after breakers are checked
- There are burn marks or smells near outlets or switches
- You're doing a major renovation that opens up walls anyway
- An electrician has given a written "not safe to use" notice
A middle path: partial rewires are possible — replacing only the old, damaged circuits while leaving modern ones in place. This costs 40–60% of a full rewire and works well in homes where extensions have already brought sections up to standard.
Frequently Asked Questions
How do I know if my house needs a full rewire?
Key signs: a ceramic fuse box with porcelain fuses, black rubber-coated cables in the ceiling, recurring circuit trips that persist after breakers are reset, burn smells from outlets, flickering lights across multiple circuits, or no RCD safety switches. If your home is pre-1975 and has any of these, book an electrical inspection ($200–$400).
Can I just upgrade the switchboard without rewiring the whole house?
Yes — if the cabling is modern TPS (white or grey plastic insulation) and in good condition, a switchboard upgrade alone is sufficient. This meets AS 3000 safety standards and supports solar, EV charging, and modern appliances. Most homes built after 1985 fall into this category.
How long does a full house rewire take in Australia?
For a 3-bedroom single-storey home, expect 5–7 working days. Two-storey homes take 10–14 days. Heritage homes with plaster ceilings and double-brick walls can extend to 14+ days. Power is progressively disconnected room-by-room during the work.
Does a switchboard upgrade require disconnecting power to the house?
Yes — typically 4–8 hours of no power while the electrician swaps the main switchboard and reconnects circuits. Some electricians can stage the work to keep essential circuits (fridge, hot water) running during part of the job.
Do I need council approval for an electrical rewire in Australia?
No council approval is required, but all work must be performed by a licensed electrician and result in a Certificate of Electrical Safety (CES in VIC / equivalent elsewhere). Without this certificate, home insurance may be invalidated.
Does a rewire add value to the home?
Yes — especially for pre-1975 homes. Buyers actively avoid old wiring risks, so a recent rewire (<5 years old) is a strong selling point and typically adds $20,000–$50,000 to perceived value in heritage or older suburbs. Get the Certificate of Electrical Safety filed with the sale contract.
What is three-phase power and do I need it?
Three-phase power provides 400V across three separate circuits instead of standard single-phase 240V. Most homes don't need it. You might need a three-phase upgrade if you have a ducted AC over 14kW, a workshop with heavy tools, EV chargers over 11kW, or plan for whole-home electrification. Upgrade cost is $2,500–$6,000+.
Get quotes from local licensed electricians — pricing varies widely by home age and access.
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