The short answer is no — in New Zealand, installing a bathroom heat lamp is restricted electrical work that must be carried out by a licensed electrician. Attempting to do it yourself is illegal, potentially dangerous, and could void your home insurance. Here's everything you need to know before you get started.
Why Bathroom Electrical Work Is Restricted in NZ
Under the Electricity Act 1992 and the Electricity (Safety) Regulations 2010, most fixed electrical wiring work in New Zealand is classified as restricted electrical work. This means only a registered and licensed electrician can legally perform it. Bathrooms are treated with extra caution because water and electricity are a life-threatening combination.
The Electrical Workers Registration Board (EWRB) oversees licensing in NZ. Once work is complete, your electrician must issue you an Electrical Certificate of Compliance (CoC) — a legal document proving the installation meets the required standard. Without a CoC, you may have trouble selling your home or making an insurance claim.
What Counts as Restricted Electrical Work?
Any work that involves:
- Connecting a heat lamp fitting to your home's fixed wiring
- Installing a new circuit or modifying an existing one
- Fitting a new switch, isolator, or timer
- Running cable through walls or ceiling cavities
…is restricted electrical work and must be done by a licensed professional. You cannot legally do any of these tasks yourself, regardless of your DIY skill level.
What a Homeowner Can Do
There are a small number of minor electrical tasks a homeowner may legally perform on their own property, such as replacing a like-for-like light bulb or resetting a tripped circuit breaker. However, installing or replacing a heat lamp fitting — even swapping one fitting for another — goes beyond these allowances because it involves working with fixed wiring in a wet zone. When in doubt, always check with the EWRB or a licensed electrician.
NZ Building Code and Bathroom Zone Requirements
Bathrooms in New Zealand must comply with the NZ Building Code, particularly Clause G9 (Electricity) — confirm the applicable clause with MBIE or your electrician, as Building Code clause references should be verified for your specific situation and Clause G12 (Water Supplies). Heat lamps installed in bathrooms must also meet AS/NZS 3000 (the Wiring Rules) and be rated appropriately for use in wet areas.
Bathrooms are divided into zones (Zone 0, 1, 2, and outside zones) that dictate what electrical equipment can be installed where. A heat lamp is typically mounted in the ceiling, which may fall within Zone 1 or Zone 2 depending on its position relative to the shower or bath. Your electrician will know exactly which zone applies and which IP-rated (Ingress Protection) fitting is required.
For guidance on the Building Code, visit MBIE Building Performance.
Does a Heat Lamp Installation Need a Building Consent?
In most cases, installing a heat lamp as a like-for-like replacement or a straightforward new fitting does not require a building consent under Schedule 1 of the Building Act 2004 — but the electrical work still requires a licensed electrician and a CoC. However, if you're doing broader bathroom renovations that affect the structure or weathertightness, consent may be required. Always check with your local council to confirm what applies to your specific situation.
You can find general guidance at MBIE Building Performance.
Choosing the Right Heat Lamp
Your electrician will help you select a fitting suitable for your bathroom, but it's useful to understand your options:
| Type | Description | Typical Use |
|---|---|---|
| Single infrared bulb | Basic, affordable, focused heat | Small bathrooms |
| Multi-bulb combination unit | Heat + light + exhaust fan | Most NZ bathrooms |
| LED heat panel | Energy-efficient, modern look | New builds/renovations |
Combination units (heat, light, and fan in one) are popular in NZ homes and must be correctly rated for bathroom use. Products must comply with relevant Australian/NZ standards — look for units with appropriate certification markings.
You can browse heat lamp options at Bunnings or Mitre 10 to get an idea of styles and features before talking to your electrician.
What Will It Cost?
As a rough guide only, expect to pay for both the fitting itself and the electrician's labour. Electrician call-out and installation costs vary by region and complexity — it's always worth getting two or three quotes. A straightforward heat lamp installation is generally a relatively quick job for a licensed sparky.
Safety Note
⚠️ Never attempt to wire a heat lamp yourself. Faulty bathroom electrical work can cause electrocution, fire, or both. Even if the power appears to be off, circuits can be live in unexpected ways. Always have a licensed electrician carry out and certify the work. For workplace safety standards, refer to WorkSafe NZ.
When to Call a Professional
You should contact a licensed electrician for any of the following:
- Installing a new heat lamp (whether replacing an old one or fitting one for the first time)
- Upgrading from a single bulb to a combination heat/light/fan unit
- Adding a new switch or timer for the heat lamp
- Any other fixed wiring work in your bathroom
A licensed electrician will ensure the work is safe, compliant with the NZ Building Code and wiring rules, and properly certified. You can find qualified local electricians on tradedirectory.co.nz.
Sources & Further Reading
- Electrical Workers Registration Board (EWRB) — licensing, restricted work, and finding a registered electrician
- MBIE Building Performance — NZ Building Code, consents, and Schedule 1 exemptions
- WorkSafe NZ — electrical safety standards and hazard information
- BRANZ — building research and best practice guidance for NZ homes
- Standards NZ — AS/NZS 3000 Wiring Rules and related standards
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