What Are the Electrical Rules for a Bathroom Renovation in Sydney?

What are the electrical rules for a bathroom renovation in Sydney? AS/NZS 3000 splits every bathroom into zones based on how close they are to water, from Zone 0 inside the bath or shower itself out to Zone 3 further from any splash risk, and each zone has its own strict rules on what electrical equipment is allowed and what waterproof rating it needs. Getting this wrong is one of the most common reasons a bathroom renovation fails its final electrical inspection, so it pays to plan lighting, power points, exhaust fans and heated towel rails around these zones before the tiler even starts.

⚡ Quick Answers: Bathroom Renovation Electrical Rules

• Can I have a power point near the vanity or basin? Only outside the classified wet zones, and never within 0.3 metres of the floor in a bathroom or laundry, unless it is a shaver socket in a specific enclosed location.
• Can downlights go directly above a shower or bath? Only if they are extra low voltage, properly waterproof rated for that zone, and supplied in a way that keeps live parts separated from anyone standing in the wet area.
• Do heated towel rails need to be hardwired? In most bathroom renovations, yes, because a heated towel rail inside a classified zone cannot simply be plugged into an ordinary power point.
• Can the switchboard be located inside the bathroom? No. AS/NZS 3000 does not allow a switchboard inside a classified bathroom wet zone under any circumstances.
• What happens if my renovation does not meet these rules? It will not pass a Certificate of Compliance for Electrical Work inspection, which can hold up your final building approval and create real rework costs later.

1. The four zones AS/NZS 3000 defines in every bathroom

AS/NZS 3000 classifies bathrooms into up to four zones based on distance from a bath, shower or other fixed water container. Zone 0 is the interior of the bath or shower base itself. Zone 1 extends up from Zone 0 to a height of 2.5 metres, and for a wall mounted shower head reaches out 1.2 metres from the fixed plumbing connection, or 0.6 metres for a ceiling mounted connection. Zone 2 extends a further 0.6 metres beyond Zone 1, and also wraps around a basin or vanity depending on its size. Zone 3 is everything else inside the room. These distances are set out in detail with diagrams in AS/NZS 3000 Clause 6.2.2, and they are measured from the actual fittings, not from where you assume the shower recess ends.

2. IP ratings required in each zone

Every zone carries a minimum ingress protection, or IP, rating for any electrical equipment installed there. Zone 0 requires IPX7 rated equipment, meaning it can be fully submerged. Zones 1 and 2 both require at least IPX4, meaning splashproof from any direction. Communal wet areas, like a shared bathroom in a gym or a strata building's common facilities, step up to IPX5. None of this is optional, and it applies to light fittings, exhaust fans, heated towel rails and anything else fixed inside the room, not just power points.

3. Where power points can and cannot go

Socket outlets are banned outright from Zone 0 and Zone 1, and cannot sit within 0.3 metres of the floor in any bathroom or laundry, since a wet floor is treated as its own risk regardless of which zone it falls in. In Zone 2, the only outlets allowed are a purpose built shaver supply unit, or an outlet protected by a 30 milliamp safety switch and enclosed in a cupboard that keeps it covered while something is plugged in. Zone 3, generally the area furthest from water, still needs a 30 milliamp safety switch, a separated supply, or extra low voltage protection on any outlet.

This is the same logic behind how we treat power points and switches around pools, and if your renovation also touches a pool area our guide to pool bonding and RCD protection covers the equivalent rules for that space.

4. Lighting, switches and heated towel rails in wet zones

Any light fitting directly above a bath or shower recess has to be extra low voltage, properly waterproof rated, and purpose built for a wet area, not a standard downlight with a waterproof cover added after the fact. Ordinary switches, dimmers and fan controllers are banned from Zone 0 entirely and need the correct IP rating in Zones 1 and 2, and like power points they cannot sit within 0.3 metres of a wet floor. Heated towel rails, exhaust fans and similar fixed appliances follow the same zone based IP requirements, and anything inside Zone 0 specifically has to run at extra low voltage and be supplied from outside the zone. In practice this is why most heated towel rails in a renovated bathroom are hardwired rather than plugged in, since a compliant outlet inside the relevant zone is either banned or heavily restricted.

5. Concealed LED strip lighting to vanities and shower niches

Concealed LED strip lighting built into a vanity, a shaving cabinet or a shower niche has become one of the most requested features in a Sydney bathroom renovation, and it can be done compliantly, but the driver and any exposed cabling still has to respect the zone it sits in. A niche inside the shower recess is very likely still inside Zone 1 or 2 depending on its position, which means the strip and its driver need the matching IP rating, or the driver needs to sit outside the classified zone entirely with only extra low voltage cabling running into it. This is exactly the kind of detail that gets missed when a lighting plan is drawn up without an electrician checking it against the actual zone boundaries first, which is why we always ask for the electrical drawings before quoting a full bathroom strip out and rebuild. If you are also refreshing the rest of the home's lighting at the same time, our guide to LED downlight upgrades and our downlight installation cost guide cover the wider planning questions worth asking beyond the bathroom itself.

6. Why the switchboard can never be inside the bathroom

AS/NZS 3000 is unambiguous that a switchboard cannot be located inside a classified bathroom wet zone under any circumstances. This comes up more often than people expect in older Sydney terraces and units, where a previous renovation squeezed a small distribution board into a bathroom cupboard because it was the only convenient space, a pattern we also see in the wider electrical upgrades needed across older Sydney homes. If your renovation uncovers this, relocating the board is not optional, it has to move before the rest of the electrical work can be signed off.

7. What a real bathroom renovation scope looks like

A typical full strip out and rebuild of a bathroom and ensuite that comes across our desk includes concealed LED strip lighting to shaving cabinets, vanities and shower niches, a handful of double general power outlets outside the wet zones, one or two hardwired heated towel rails, and disconnecting and safely terminating the existing wiring before demolition starts. Exhaust fans are often reused rather than replaced, which means checking the existing switch wiring is still compliant once it is reconnected at fit off, and our exhaust fan installation guide covers what to check if yours needs replacing instead. None of this is unusual work, but it only goes smoothly when the electrical scope is planned against the actual zone drawings from the start, rather than worked out on site after the tiling is already finished.

How High Demand Electrical helps

High Demand Electrical is a licensed local team, not a call centre, and bathroom renovation wiring is everyday work for us across Sydney's apartments, terraces and family homes. We review your renovation or architectural drawings before quoting, so vanity lighting, shower niche strips, heated towel rails and general power outlets are all planned against the correct AS/NZS 3000 zones from day one, not fixed after the fact once tiling has already gone in. If you are looking for the best electrician near you for a bathroom or ensuite renovation in Sydney, our team handles everything from the disconnection and termination of existing wiring through to final testing and certification.

Bathroom Renovation Electrical FAQs (Sydney)

Can I install my own power point during a bathroom renovation?

No. Any new circuit, socket outlet or fixed wiring in a bathroom needs to be installed by a licensed electrician and tested before use, given how strict the zone rules are and how much is at stake if they are not followed correctly.

Does a bathroom renovation always need a full electrical inspection?

Any new or altered wiring needs to be tested and certified before it is used, and a broader electrical safety inspection is worth considering if the rest of the property's wiring has not been checked recently.

What if my existing switchboard cannot handle the new bathroom load?

Heated towel rails, underfloor heating and additional circuits can add meaningful load to an older board. See our switchboard upgrade page if a renovation reveals the existing board needs more capacity or modernising.

Can I move my bathroom's location during a renovation?

Yes, but relocating a bathroom often means relocating existing circuits and sometimes the switchboard itself if it was previously located too close to the new wet area, which needs to be planned early rather than discovered mid renovation.

Who can I ask to check my renovation plans before starting?

A licensed electrician can review your bathroom drawings against AS/NZS 3000's zone requirements before work starts. See our residential electrical services for the kind of renovation planning support this falls under.

Get Your Bathroom Renovation Wiring Right the First Time

Planning a bathroom or ensuite renovation in Sydney? Get a residential electrical quote and have your lighting, power and heated towel rail layout checked against AS/NZS 3000 before the tiler starts. Call 0402 559 777 to talk to the team. Every job needs a site assessment, or a review of your drawings, before scope and pricing can be confirmed.