Get a fixed quote: NZ rewire costs in 2026, $8,000–$30,000 and consent
Most Kiwi homeowners pay somewhere between $8,000 and $30,000+ to rewire a house, depending on size, age and access, with Auckland jobs usually landing above the national average. That range is too wide to budget from, though, so the first real step is booking an on-site assessment with a licensed electrician and asking for a fixed, written quote and a Certificate of Compliance before any work starts.
TL;DR:
Rewiring a home can cost between $8,000 and $30,000 or more, with Auckland projects often above the national average due to access and local rates.
Major signs like flickering lights, warm switches, or burning smells indicate urgent rewiring needs, especially in homes over 30 years old.
Costs increase significantly if asbestos, limited access, or the need for a switchboard upgrade are present, and detailed, fixed-price quotes are essential for comparison.
Rewiring scope typically involves new cabling, earthing updates, socket replacements, switchboard upgrades, and thorough testing with a Certificate of Compliance.
Coordinating rewiring with renovations can reduce costs and disruptions, and a comprehensive quote should itemize all work to ensure value and compliance.
Table of Contents
When should a home be rewired? Warning signs and priority cases
Wiring installed more than 30 to 40 years ago is generally worth having inspected, even if nothing seems wrong. Older insulation degrades, and some homes still run on materials no licensed electrician would install today.
Watch for these signs that usually mean rewiring can’t wait:
Lights that flicker or dim when appliances switch on
Circuit breakers or fuses that trip regularly
Power points or switches that feel warm to the touch
A burning smell near outlets or the switchboard
Visible aluminium wiring or old knob and tube wiring in the roof or subfloor
Beyond safety symptoms, certain projects almost always trigger a rewire regardless of the wiring’s age. A major renovation that opens up walls, a switch away from gas appliances, or the addition of a heat pump, induction cooktop or EV charger all place new demands on a switchboard built for a different era. Discovering asbestos once you start opening up ceilings or walls often forces the same decision, since the area needs to be dealt with properly before anyone runs new cable through it. Many 1950s houses fall into this category by default.
What a rewire actually involves: scope, testing and paperwork
A rewire quote should spell out more than “new wiring.” The work generally follows a set sequence, and knowing it helps you compare quotes properly:
Cable and circuit work — running new cabling throughout the home and splitting it into appropriately sized circuits for lighting, power and heavy appliances.
Earthing — bringing the home’s earthing system up to current requirements, particularly in older houses that predate modern earthing rules.
Sockets and switches — replacing or adding power points, light switches and outlets to match how the home is actually used now.
Switchboard replacement — swapping the old fuse box or consumer unit for a modern board with circuit breakers, if the existing one can’t safely carry the new load. A switchboard upgrade is sometimes quoted separately from the rewire itself, so check which is which.
Testing and certification — insulation resistance and continuity tests, followed by a final test. The electrician then issues a Certificate of Compliance for the fixed wiring work, which you should keep for insurance and any future sale.
Ancillary work — patching plaster and paint where cables were run, accessing floors or ceilings, handling any asbestos found along the way, and re-siting communications, TV or powerpoint outlets.
What does it actually cost? NZ price bands by job size
A single room or partial rewire, such as updating one area during a kitchen or bathroom renovation, typically sits at the lower end of the scale and can often be handled within a few thousand dollars depending on access. A small house full rewire moves that budget up considerably, while a standard three or four bedroom home is where most published New Zealand estimates cluster.
Full-house rewires in New Zealand commonly range from around $8,000 to $30,000 or more, and Auckland projects often sit above the national average once access, consents and local trade rates are factored in.
In numbers: Published New Zealand cost guides place a typical full-house rewire in the $8,000 to $30,000+ bracket, with large or character homes, restricted access, or asbestos remediation pushing well past the top of that range.
Large villas, bungalows and other character homes usually land at the top end or beyond it. Restricted subfloor access, plaster ceilings that need careful removal and reinstatement, and the discovery of asbestos in older housing stock all add real cost and time.
A few things to check before you compare numbers between quotes:
Whether GST is included in the figure quoted
Whether plaster, paint or floor repairs are part of the price or billed separately
Whether asbestos testing or removal is included if the home is older
Whether switchboard replacement is already factored in or treated as an extra
Whether the quote reflects an Auckland-specific rate or a generic national average
What changes the price, and how to judge a quote on value
Access is usually the biggest swing factor. A home with an open subfloor and no ceiling cavities is far cheaper to rewire than one with lath and plaster ceilings, tiled floors, or a cramped crawl space an electrician has to work through lying flat.
Wiring type matters just as much. Homes with aluminium wiring or old knob and tube wiring generally need more extensive replacement than homes with ageing copper, since those materials carry known safety issues.
Other variables to check for in every quote:
Whether the switchboard needs full replacement or just new circuits added
The number of new circuits and outlets specified
Smoke alarm upgrades, which are often bundled into rewiring jobs
Hidden cost risks: asbestos, council requirements, or unexpected damage found once walls open up
Pro Tip: Ask each electrician to itemise the switchboard, testing and finish repairs as separate line items rather than one lump sum. It makes real apples-to-apples comparison possible, and it flags upfront whether asbestos handling is included or excluded.
A fixed price beats an estimate every time, and a quote that clearly promises a Certificate of Compliance on completion is worth more than one that’s silent on it.
How long does it take, and what about consent?
Timelines vary enormously with scope:
Single room or partial rewire — typically a few days of on-site work.
Standard house rewire — usually one to two weeks for a typical three or four bedroom home.
Complex or character home rewire — weeks to months once plaster repairs, asbestos handling and access challenges are factored in.
Building consent usually isn’t required for straightforward repairs or like-for-like replacements, but structural penetrations, additions, or work tied to a broader renovation project can trigger it.
On the regulatory side, the Electricity (Safety) Amendment Regulations 2025 came into force on 13 November 2025, with a transition period running until 12 November 2026. Only the parts of an installation that are altered or added need to meet the updated standard, so existing safe wiring doesn’t automatically need upgrading just because the rules changed. Keep every CoC issued for your rewire; it matters for insurance claims and for selling the home later.
How to get quotes you can actually compare
Consumer NZ recommends getting written quotes and understanding exactly what’s included before you sign anything, and it’s sound advice for a job this size. Aim for at least three written quotes from licensed electricians, and push for a fixed price with an itemised scope rather than a rough estimate.
Before accepting any quote:
Confirm the electrician is licensed and will issue a Certificate of Compliance
Check whether switchboard replacement, testing and finish repairs are included or extra
Ask how they’d handle an unexpected finding, like asbestos, if one turns up mid-job
Review your renovation insurance to confirm the work is covered while it’s underway
WorkSafe is clear that fixed wiring work needs to go through a licensed electrician, both for safety and to keep your insurance valid.
Practical ways to cut cost without cutting corners
The cheapest rewire is one that piggybacks on work you’re doing anyway:
Time the rewire to coincide with a kitchen, bathroom or full renovation while walls are already open, since access costs drop sharply
Supply your own light fittings or accept a prime cost sum for fixtures instead of letting the electrician mark them up
Stage the work: fix safety issues and non-compliant wiring first, and leave cosmetic outlet relocations for later
Pro Tip: If you’re planning a renovation in stages, tell your electrician the full future plan upfront. Running extra circuits now, while a wall is open, is far cheaper than opening it again in two years.
How Sorted Home Solutions manages rewiring inside a renovation
Rewiring rarely happens in isolation. It sits inside kitchen upgrades, bathroom renovations, or full home projects where plaster, paint and consent all need coordinating alongside the electrician. Sorted Home Solutions manages that coordination directly, arranging licensed electricians, testing and Certificates of Compliance while handling the finish repairs around them. Homeowners weighing up a rewire alongside a bigger project can see how that looks in practice in real renovation results.
Why the standard rewiring advice misses half the picture
Most guides to rewiring costs treat the job as a standalone electrical task: quote it, book it, done. That misses how often a rewire actually surfaces, which is halfway through a kitchen renovation when someone opens a wall and finds aluminium wiring, or during an electrification project when a switchboard turns out to be decades past its safe capacity. Treating the electrical work as separate from the renovation it sits inside is where budgets blow out, not the wiring itself.
The regulatory transition running through to November 2026 gets more attention than it deserves in isolation. It matters, but the practical takeaway is simple: existing safe wiring stays compliant unless you alter it, so it shouldn’t be the reason you rush a decision. What should drive the timing is the warning signs, the age of the wiring, and whether you’re about to renovate anyway.
If there’s one thing worth prioritising over everything else in a quote, it’s the Certificate of Compliance. A cheaper price with no CoC promised isn’t a cheaper job. It’s an uninsured one.
— Rudi
Get a fixed-price quote that covers the whole job
Sorted Home Solutions is the alternative to juggling separate trades for a rewire buried inside a bigger renovation. Instead of chasing an electrician, a plasterer and a painter separately and hoping their timelines line up, you get one fixed-price quote, one point of contact, and a team that coordinates the licensed electrician, arranges the Certificate of Compliance, and handles the finish repairs around the new wiring.
That matters most when a rewire is tangled up with a kitchen or bathroom renovation, or a full home project where walls, ceilings and switchboards all need attention at once. Sorted Home Solutions manages that whole scope under one contract, whether it’s a full home renovation or smaller finish work that needs to happen alongside the electrical upgrade. If you’re planning a rewire as part of a bigger project, check current pricing and packages and request a no-obligation site assessment to get a fixed number instead of a guess.
Sources
FAQ
At what age should a house be rewired?
Homes with wiring older than 30 to 40 years are generally worth inspecting, even without obvious problems, since insulation degrades over time. Homes with aluminium wiring or knob and tube wiring, common in older housing stock, usually need rewiring regardless of exact age.
What is the average cost of rewiring a three-bedroom house?
Standard three or four bedroom rewires in New Zealand typically fall within the broader $8,000 to $30,000+ national range, with the final figure depending heavily on access and whether the switchboard also needs replacing. Auckland homes tend to sit toward the higher end of that band.
Is it worth rewiring an old house?
Yes, in most cases: modern wiring reduces fire risk, supports higher-demand appliances like heat pumps and EV chargers, and can influence resale value since buyers and insurers both look favourably on a documented rewire. A Certificate of Compliance from the job also gives future buyers confidence the work was done properly.
How much does it cost to fully rewire a house?
A full rewire in New Zealand commonly falls between roughly $8,000 and $30,000 or more, depending on size, access and whether asbestos or a switchboard upgrade is involved. Character homes and larger properties usually sit at the top of that range or beyond it. Getting a fixed, itemised quote from a licensed electrician is the only reliable way to know your actual number.
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