What registration or licence does a tiling business need in New Zealand?

Does a tiler need a licence to work in New Zealand?

No single licence is required to trade as a tiler in New Zealand. According to the government's own Occupation Outlook page, there is no licensing for tilers, and the LBP Handbook lists tilers among the trades not currently licensed through the Licensed Building Practitioners scheme or any other registration scheme.

That does not mean training is pointless. A tiler can still work through the BCITO toward a National Certificate in Floor and Wall Tiling, Level Four, which the Occupation Outlook page notes usually takes less than three years. Builders, renovators and homeowners often ask for that qualification as proof of skill, even though the law does not require it to pick up a trowel.

What about waterproofing and wet areas, does a tiler need something more?

Yes, this is where the real exposure sits. Even though there is no personal licence for tilers, the waterproofing under tiles in a bathroom or shower recess is treated as building work in its own right, and that work can trigger consent requirements the tiler has to work within.

A recent Ministry determination on two tiled showers found that building work on the internal linings and finishes of a wall, ceiling or floor in an existing dwelling, which is how retiling and relining a bathroom is usually described, falls within the schedule of the Building Act that normally allows an exemption from consent. The Ministry's own guidance, referenced in that determination, treats installing a waterproof membrane under tiled walls in a shower as work that needs consent rather than being left to trade judgement alone.

The building consent exemptions quick guide spells this out plainly: wet area showers sit outside the general exemption for internal linings and finishes. So a tiler working on a shower recess, falls or a wet area floor is not just choosing a membrane and getting drainage right, they are working inside a part of the Building Act that a builder or the council can ask about later.

What registration does a tiler's business actually need?

Running a tiling business in New Zealand mostly comes down to tax and cover, not a trade licence. Business.govt.nz confirms a sole trader does not need to register the business with a government agency, only to let Inland Revenue know work has started, and to register for GST once turnover requires it.

Cover matters too. The same page points a self-employed tiler to set up a MyACC business account to pay the levies that fund cover if they are injured, whether that happens on site laying screed, or driving between a bathroom renovation and the next quote.

A tiler is also a PCBU, a person conducting a business or undertaking, under the Health and Safety at Work Act 2015. That Act puts the responsibility on the tiler, whether sole trader or employer, to look after their own health and safety and that of anyone their work affects, including the other trades waiting to get back on site once the wet area is sealed.

This is general information, not legal, tax or employment advice. Check your own situation with the body named here or a qualified adviser.

What happens when a tiler isn't properly set up for restricted work like waterproofing?

The cost rarely shows up as a fine. It shows up months later as a warranty callback that was never priced into the original quote, and that is where a job that looked profitable on the day it was signed off can quietly turn into a loss.

A bathroom retile or new shower recess is usually quoted on a square metre rate or a day rate that assumes the floor preparation, falls and membrane go to plan first time. If the waterproofing under the tiles is wrong, whether that is the wrong membrane for a wet area, poor falls to the drain, or work that should have gone through consent but didn't, the fault often stays hidden behind the tiles until the builder has long since handed the job to the homeowner.

When the leak finally shows, the tiler is the one pulling tiles back out, relaying screed, redoing the membrane and retiling, all without another invoice going out. Picture a tiler quoting a run of bathroom renovations off memory and a rough day rate. With so many small items on each job, from levelling clips for large format tile to trims and the right membrane for the wet area, it is easy for one or two to be left off the quote, and then the crew is short on site halfway through, or the waterproofing step gets rushed to make up time. Either way, the real cost of the job was never fully in the quote in the first place.

How can a tiler's own job data catch this before it becomes a warranty claim?

You catch it by looking at gross profit on each job after it's finished, not just the square metre rate or day rate you quoted at the start. That number, tracked job by job against what the materials, breakage, tile supply and actual hours really cost, tells you which jobs are genuinely profitable and which ones are only profitable until something goes wrong.

Data first thinking means starting from that record rather than from memory of how the last few bathrooms went. A quote written from memory tends to repeat the same gaps: the same membrane left off a wet area line, the same allowance missing for a shower recess that needed extra falls work, the same assumption that a renovation will go smoothly because the last one did.

This is where AI agents earn their keep. An AI agent is software that does a job the way you would do it yourself, using your own prices, your own wording and your own rules, rather than a generic template built for every trade. One AI agent can hold a checklist for every job type, down to the small items like levelling clips and trims, so nothing is missing from the quote before it goes out. Another agent can flag any job that includes wet area waterproofing, so it gets the documentation and sign-off that restricted work needs, instead of relying on someone remembering to do it under pressure on site.

None of that removes the need to get the waterproofing right. It does mean the quote reflects what the job actually costs to do properly, so the cost of doing it right is in the price the builder or homeowner pays, not quietly absorbed later as a warranty callback.

Where can you check the current rules?

• Occupation Outlook, Roofers and Tilers: confirms there is no licensing for tilers and outlines the optional BCITO qualification pathway.
• LBP Handbook: lists the trades, including tilers, that sit outside the Licensed Building Practitioners scheme.
• Ministry determination on tiled showers: a ruling that explains how internal linings and wet area waterproofing sit within the Building Act.
• Building consent exemptions quick guide: sets out why wet area showers generally fall outside the usual exemption for internal linings.
• Becoming a sole trader: covers what a sole trader must and must not register, including Inland Revenue and ACC.
• Health and Safety at Work Act 2015: sets out a PCBU's duties, which apply to a self-employed tiler or a tiling business with crew.

How does Data First Coaching approach this?

Greg Allan's Data First Coaching does not start by asking a tiler what their quotes look like or how their waterproofing process runs, it starts from the business's own job and finance data through the Trade Business Intelligence. From there it looks at which jobs carried a warranty callback, which quotes included the full cost of restricted work like wet area waterproofing, and where a day rate or square metre rate was quietly short of what the job really took.

That is often where the real root sits, further back than the licence question itself. The how, including the way that data gets turned into a working quoting and compliance process, is worked through inside the Academy, with members. The Academy is built for tiling business owners who are open minded, innovative and willing to share, because the Trade Business Intelligence is powered by every member.