The short answer
For most electrical work in New Zealand, yes — you should hire a licensed electrician. New electrical installations, alterations, repairs and testing are tightly regulated because electrical mistakes can cause shock, fire and expensive damage. Some very limited low-risk tasks may be done by a homeowner, but the line between “DIY-legal” and regulated work is narrower than many people realise.
If the job involves wiring, switchboards, mains, fixed appliances, outdoor power, hot water cylinders, underfloor heating, spa pools, EV chargers or anything that needs a compliance certificate, use a licensed electrical worker. If you are unsure, treat it as regulated work and get advice before touching it.
How electrical work is regulated in New Zealand
Electrical work in New Zealand is regulated under the Electricity Act and monitored by the Electrical Workers Registration Board (EWRB). The core idea is simple: work that could affect safety, the supply network or the compliance of a property should be done by a properly registered and licensed person, or in some cases under direct supervision where the law allows it.
A few terms matter:
- **Registered electrical worker**: a person registered with the EWRB. - **Licenced electrician**: a registered electrical worker who holds the appropriate practising licence. - **Certifying electrician**: a higher-authority electrician who can certify prescribed electrical work. - **Prescribed electrical work (PEW)**: regulated work that must be done by an authorised person and, where required, certified.
For homeowners, the key point is that “I know how to do it” is not the same as “I’m allowed to do it”.
What work legally needs a licensed electrician?
In general, anything that involves installing, altering or repairing fixed wiring in a property should be treated as licensed work. That includes most work behind the wall, in the ceiling, under the floor, at the switchboard, or connected to the permanent electrical system.
Typical jobs that should be done by a licensed electrician include:
- installing or relocating power points, light switches and light fittings - changing or upgrading switchboards - adding new circuits - hardwiring ovens, cooktops, hot water cylinders and heat pumps - installing EV chargers - wiring bathroom or laundry renovations - outdoor power and lighting - spa pool and pool electrics - fault-finding and repairs in fixed wiring - mains and supply-side work
Some of these jobs may also require certification, testing, or notification through the correct compliance process. If an electrician tells you a job can be done “easily”, ask whether it is legally prescribed electrical work and whether a certificate will be issued.
What can a homeowner do themselves?
There is a small amount of electrical work that can be legal for a homeowner to do, but it must be genuinely low risk and within the law. The exact line can be technical, so if a task seems more than a simple like-for-like replacement, stop and ask a licensed electrician.
Common examples of DIY-legal tasks can include:
- replacing a light bulb or tube - operating plug-in appliances normally - replacing a fuse in a plug top if done correctly and safely - changing a plug on a flexible cord in some circumstances, if you are competent and follow the rules - replacing a switch or socket front cover where no wiring is disturbed may still be risky, so check first rather than assume
Important: even if a task feels small, it may still be illegal if it involves accessing fixed wiring, altering terminals, or disturbing insulated conductors. Many “simple” jobs become regulated as soon as a screwdriver goes near the wrong part of the installation.
DIY electrical work: where people get into trouble
Homeowners often assume electrical DIY is allowed because the job looks minor. In practice, the biggest mistakes happen in bathrooms, kitchens, garages and outdoor areas, or when someone is renovating and wants to save a call-out fee.
Common problem areas include:
- **adding extra outlets** because “there’s already power there” - **swapping light fittings** where the wiring arrangement is not straightforward - **hardwiring appliances** such as ovens or fans - **work in wet areas**, where location and protection requirements matter - **older homes** with old wiring colours, mixed-age wiring, or undersized circuits - **switchboard changes** after a renovation or heat pump install
A job may appear to work after DIY installation and still be unsafe, non-compliant or uninsurable. Electrical faults can be hidden for months before they become a fire, a tripping issue or an expensive emergency repair.
How to tell if your job needs a pro
A useful rule for homeowners is: if the work is permanent, wired, concealed, high-load or near water, assume you need a licensed electrician.
Use this quick guide:
| Job type | DIY-legal? | Licensed electrician needed? | |---|---:|---:| | Replacing a light bulb | Yes | No | | Plugging in an appliance | Yes | No | | Replacing a hardwired oven | No | Yes | | Installing a new power point | No | Yes | | Changing a switchboard | No | Yes | | Installing an EV charger | No | Yes | | Repairing a fault in wiring | No | Yes | | Fitting a plug top to a flexible cord | Sometimes, if competent and legal | Often, if uncertain | | Replacing a broken light fitting on existing wiring | Usually no | Yes, if wiring is disturbed |
If you are still unsure, ask the electrician before you start. A quick phone call is far cheaper than redoing work later.
Why hiring a licensed electrician matters beyond the law
The legal side is only one reason to use a registered, licensed electrician. In real life, the bigger issue is the cost of getting it wrong.
Safety
Electrical faults can lead to:
- electric shock or electrocution - fire inside wall cavities or ceilings - damage to appliances and electronics - nuisance tripping or power loss - unsafe bathrooms, kitchens or outdoor areas
New Zealand homes often have a mix of older and newer fittings. That creates risk when someone assumes everything is wired to modern standards.
Insurance
If unlicensed or non-compliant electrical work contributes to a loss, your insurer may ask who did the work and whether it was lawful. Even if the policy still responds, you could face delays, investigation, reduced cover, or a dispute over whether the workmanship was the cause.
Keeping invoices, compliance documents and electrician details is a smart move for any renovation or repairs.
Resale and LIM/building file issues
When you sell, buyers and their advisers may ask about recent electrical work, especially after renovations, kitchen upgrades, new heating, or additions. If the work should have been done by a licensed electrician, but wasn’t, it can become a bargaining issue or a deal complication.
The problem may show up in:
- pre-purchase due diligence - LIM or council file review where applicable - builder’s reports - requests for evidence of compliance or invoices
If you can’t prove the work was done properly, you may be asked to discount the price or fix it before settlement.
Compliance and future renovations
Electrical work often links to other trades. A kitchen or bathroom project may also need plumbing, cabinetry, tiling and building work. Even if the electrical part is small, it still needs to be done correctly so the whole job can progress without rework.
If you are doing major renovations, it is sensible to coordinate trades and ask the electrician what documents you’ll need at the end of the job.
What to ask before you hire an electrician
Not all electricians offer the same level of service, and not every job needs the same qualification level. Before you accept a quote, ask:
- Are you registered and do you hold the correct practising licence? - Will this work require a certificate or other compliance documentation? - Have you done similar work in NZ homes of this age? - What is included in the quote — labour, materials, testing, travel and call-out? - Will you handle any required coordination with the builder, plumber or sparkie on site? - What warranty do you provide on labour and materials?
It is also worth asking whether the electrician is comfortable working in older homes, villas, bungalows or post-earthquake repairs, as these can present different wiring conditions.
How to compare quotes properly
For homeowners, the cheapest quote is not always the best value. Electrical work is one area where a bargain can disappear fast if the job is under-scoped or has to be redone.
When comparing quotes:
- get at least **two or three written quotes** for non-urgent work - make sure each quote covers the same scope - check whether materials are included or charged separately - ask whether after-hours, urgent call-out or travel charges apply - confirm GST status - look for clear wording about testing, certification and cleanup
A good quote should describe the work in plain English. If it is vague, ask for clarification before you agree.
Signs you should stop a DIY job and call an electrician
If you have already started a project, stop and call a pro if you find:
- brittle or crumbling insulation - old rubber, cloth or mixed-colour wiring - scorch marks, melted plastic or burning smells - repeated tripping of breakers or RCDs - water ingress near wiring or fittings - more than one cable type or age in the same area - no clear understanding of what circuit you are working on
In older New Zealand homes, the real danger is often not the visible fitting but the hidden condition of the wiring behind it.
The bottom line
In New Zealand, most electrical work should be done by a licensed electrician, and many jobs also require certification or formal compliance steps. DIY is only appropriate for a narrow range of simple, low-risk tasks. If the work involves fixed wiring, wet areas, switchboards, hardwired appliances or anything hidden in the structure of the home, bring in a professional.
That’s not just about staying within the law. It’s about keeping your family safe, protecting your insurance, and avoiding nasty surprises when you sell or renovate later.
If in doubt, get the job assessed and ask for a written quote from a licensed electrician before you touch the wiring.