Wellington's old villa stock is full of original ceramic fuse boards. As homeowners add heat pumps, EV chargers, and solar, upgrading to modern circuit breakers with RCDs becomes necessary. Here's what switchboard upgrades cost in Wellington in 2026.
Wellington Switchboard Upgrade Costs 2026
| Service | Wellington typical cost |
|---|---|
| Standard switchboard upgrade (single-phase) | $2,300–$4,700 |
| Complex upgrade (three-phase or rewire involved) | $3,700–$6,800 |
| Add RCD / safety switch (to existing board) | $280–$580 |
| Add circuit breaker (individual circuit) | $180–$380 |
| Switchboard inspection / report | $180–$350 |
| Underground supply upgrade (lines company) | $1,500–$5,000+ |
All prices GST inclusive. Comparable to auckland. Price depends heavily on board location, number of circuits, and whether rewiring is required.
Wellington Switchboard Market
Wellington's old villa stock is full of original ceramic fuse boards. As homeowners add heat pumps, EV chargers, and solar, upgrading to modern circuit breakers with RCDs becomes necessary.
When Do You Need a Switchboard Upgrade?
You likely need an upgrade if your home has: - Original ceramic or glass fuse holders (not circuit breakers) - No RCDs (safety switches) — required by NZ Building Code for new work - Fuses blowing frequently - Less than 63A capacity for a modern home - Aluminium wiring (pre-1975 homes — special attention needed)
Triggered by adding: - EV charger (requires dedicated 32A circuit) - Solar system (requires AC disconnect and metering changes) - Electric vehicle charger - Induction cooktop or electric oven (high draw) - Heat pump (particularly multi-split or ducted systems)
What an Upgrade Includes
A full switchboard upgrade in Wellington typically includes:
- Replace fuse board with modern consumer unit (circuit breakers)
- Install RCDs (residual current devices) for personal protection
- Label and test all circuits
- Issue Electrical Certificate of Compliance (eCoC)
Your electrician will also identify any unsafe wiring and recommend remediation.
Safety Switches (RCDs) — Why They Matter
RCDs detect earth faults and trip in under 30ms — fast enough to prevent electrocution. NZ Building Code requires RCD protection on all new circuits and upgraded switchboards. If your switchboard has no RCDs, this is a safety issue — particularly important if you have young children.
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How much does a switchboard upgrade cost in Wellington? Standard single-phase upgrade: $2,300–$4,700. Complex/three-phase: $3,700–$6,800.
Do I need a switchboard upgrade for an EV charger? Often yes — older fuse boards don't have capacity for a dedicated 32A EV charging circuit. Your electrician will assess during the quote.
Is a switchboard upgrade restricted electrical work? Yes — must be done by a registered electrician who will issue an Electrical Certificate of Compliance. Never attempt DIY on a switchboard.
Related: Electricians Wellington | EV Charger Installation Wellington | Solar Installers Wellington