Installing a bathroom mirror with integrated lighting can be a straightforward upgrade — but whether you can do it yourself depends heavily on how the mirror connects to your home's electrical system. In New Zealand, bathroom electrical work is tightly regulated, and getting it wrong can be dangerous and illegal. Here's what you need to know before you pick up a screwdriver.
Understanding Restricted Electrical Work in NZ
Under the Electricity Act 1992 and its regulations, most electrical wiring work in New Zealand is restricted electrical work (REW) — meaning it must be carried out by, or under the supervision of, a licensed electrician. This is enforced by the Electrical Workers Registration Board (EWRB).
Bathrooms are classified as special locations under NZ wiring rules (AS/NZS 3000, commonly called the Wiring Rules). Special locations have stricter requirements because of the increased risk of electric shock in wet environments. This means any new wiring, new circuits, or modifications to existing circuits in a bathroom must be done by a licensed electrician — full stop.
What a Homeowner CAN Legally Do
There are a small number of tasks homeowners can legally carry out themselves without being a licensed electrician:
- Replacing a like-for-like fitting: If your existing bathroom mirror already has an integrated light and a suitable connection point (such as a plug or a pre-wired connector), you may be able to swap it for a new mirror of the same type without touching any fixed wiring.
- Plug-in mirrors: If the integrated light mirror simply plugs into an existing, properly positioned GPO (general purpose outlet/power point), no electrical wiring work is involved and you can install it yourself.
- Mounting the mirror: The physical task of hanging or mounting the mirror to the wall is something most competent homeowners can do, provided you follow the manufacturer's instructions and locate studs or use appropriate fixings for your wall type (e.g. plasterboard anchors for GIB walls).
Important: Even replacing a like-for-like fitting can become restricted work depending on the specifics. If you are unsure, always check with a licensed electrician before proceeding.
What MUST Be Done by a Licensed Electrician
The following tasks are restricted electrical work and must be carried out by a licensed electrician:
- Running new wiring or cables to the mirror location
- Installing a new circuit or adding to an existing circuit
- Installing or relocating a switch for the mirror light
- Connecting the mirror to a hardwired junction box or fused spur
- Any work involving the switchboard or consumer unit
- Installing shaver sockets or demister pad connections
Once the work is complete, your electrician must issue you a Certificate of Compliance (CoC) — keep this document safe, as you'll need it if you ever sell your home or make an insurance claim.
Bathroom Zones and IP Ratings
NZ wiring rules divide bathrooms into zones (based on proximity to water sources like the shower or bath). Light fittings and electrical accessories must have an appropriate IP (Ingress Protection) rating for the zone they're installed in. Your integrated mirror light must be rated for bathroom use — check the product specifications carefully and confirm with your electrician that it meets the requirements for its intended location.
WorkSafe NZ has general guidance on electrical safety, and the EWRB can help you verify whether a person is licensed to carry out electrical work.
Do You Need a Building Consent?
For most like-for-like mirror replacements, a building consent is unlikely to be required. However, if the installation involves structural changes to walls or significant new electrical infrastructure, it's worth checking with your local council. Schedule 1 of the Building Act 2004 lists exemptions from building consent — but always confirm with your council rather than assuming your project qualifies.
For more guidance on building consents and exemptions, visit MBIE Building Performance.
Choosing the Right Mirror
When selecting your integrated lighting mirror, look for:
- NZ/Australian electrical approval marking (the RCM mark or equivalent)
- An appropriate IP rating for bathroom use (commonly IP44 or higher)
- Clear installation instructions specifying the connection type (plug-in vs hardwired)
- Warranty and after-sales support from a reputable supplier
You'll find a range of options at stores like Bunnings and Mitre 10, as well as specialist bathroom retailers.
Safety Note
Never attempt to work on fixed wiring yourself, even if it looks simple. Water and electricity are a deadly combination, and DIY electrical work that doesn't comply with NZ regulations can void your home insurance, create serious safety hazards, and result in significant fines. If in doubt, always call a professional.
When to Call a Professional
You should engage a licensed electrician any time the installation involves hardwired connections, new wiring, or anything beyond a straightforward plug-in or like-for-like swap. A qualified electrician will ensure the work complies with AS/NZS 3000 Wiring Rules, NZ regulations, and the specific requirements for bathroom special locations — and will provide the Certificate of Compliance you need.
You can find licensed, local electricians on tradedirectory.co.nz to get quotes and book the job with confidence.
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