By Greg Allan, tradesman and creator of Data First Coaching
Does a plasterer need an LBP licence to work in New Zealand?
Not for every job. According to Building.govt.nz, a Licensed Building Practitioner (LBP) must carry out or supervise restricted building work, and there is a separate licence class just for external plastering. This is where plasterers often misjudge what applies to them.
LBP scheme overview explains that restricted building work is work that affects a building's primary structure or its weathertightness, the outside envelope that keeps moisture out. Most interior plastering, sheeting new plasterboard, stopping, sanding, fixing cornice, square set ceilings or a bulkhead, sits outside that definition because it doesn't touch the structure or the weather envelope.
External solid plastering, render over masonry, and proprietary plaster cladding systems are a different story. The External plastering licence class page confirms this licence class covers exactly that work on any category of building. Carrying out restricted building work is clear that doing restricted building work without the right licence is an offence, so a plasterer taking on exterior render or a cladding system needs to check whether that job falls inside the restricted category before quoting it.
What does registering a plastering business actually add to the cost base?
For a plasterer moving off subcontracting and into running their own registered business, the licence isn't the real cost. It's everything that follows registration, accident cover, insurance, GST obligations, and if a crew is hired, payday obligations, that sits outside the job cost sheet unless someone deliberately puts it there.
Most plasterers keep quoting the same square metre rate they used as a subbie to a builder, because that rate has always covered materials, labour and a bit of margin on top. Once the business is formally registered, that same rate is also meant to carry the cost of being a registered, insured, compliant operator. If nobody folds that cost in, every sheeting and stopping job can look profitable on the quote and still bleed margin once drying time delays, call backs and water damage rework eat into the job.
How do you register a plastering business, sole trader or company?
You have two paths, and they land the cost of being compliant differently rather than removing it. According to Becoming a sole trader, a sole trader doesn't register with a government agency at all, you only need to inform Inland Revenue that you've started working for yourself.
Registering a company is a different process. Starting a company explains that you sign in with RealMe, check and reserve a company name, and register through the Companies Office, which automatically issues a New Zealand Business Number (NZBN). Owner drawings and the personal tax that follows are real cash leaving the business either way, whatever structure you choose. The structure changes when and how that tax bill lands, not whether it exists.
What duties do you pick up once you're subcontracting to builders as a registered business?
Once you're a registered business taking work from builders, you carry your own health and safety duties alongside theirs, not instead of them. The Health and Safety at Work Act 2015 is New Zealand's main work health and safety law, and WorkSafe's guidance on PCBUs working together sets out what that means for a plastering crew moving between sites.
WorkSafe says each business in the chain must ensure, so far as is reasonably practicable, that its own crew and other people on site aren't put at risk by its work. For a plasterer subcontracting to a builder, that duty runs alongside the builder's duty to the whole site, each party is responsible for managing the risks in the scope they control.
Why does registration change what your square metre rate actually needs to cover?
Getting registered is where markup and margin stop being the same thing, and a plasterer who only adds a flat markup to materials and labour can still end up with a much thinner real margin than the quote suggested. Markup is calculated on cost, margin is calculated on price, and the gap between the two is exactly where registration costs disappear if they're not deliberately priced in.
This is where AI agents, software that does a job the way you'd do it yourself, with your prices, wording and rules, change what's possible for a plasterer's office work. An AI agent can track what each job actually cost against what it quoted, including the drying time between coats, the renovation patching that ran long, or the water damage job that needed extra sanding, and feed that straight back into the rate. That's data first: starting from your own job and invoice numbers rather than the square metre rate you've always used, because the rate that worked as a subbie doesn't automatically cover a registered, insured business.
This is general information, not legal, tax or employment advice. Check your own situation with the body named here or a qualified adviser.
Where can you check the current rules?
- Use licensed people for restricted building work - when an LBP is required and how to check someone's licence on the register.
- LBP scheme overview - what restricted building work covers and why the LBP scheme exists.
- External plastering licence class competencies - exactly what the external plastering licence class covers.
- Carrying out restricted building work - the process and records an LBP must provide.
- Starting a company - how to register a company and get an NZBN.
- Becoming a sole trader - what a sole trader needs to tell Inland Revenue.
- PCBUs working together: advice when contracting - health and safety duties when subcontracting to a builder.
- Australian licence holders - how Australian-registered practitioners apply for an LBP licence under the Trans-Tasman Mutual Recognition Arrangement.
How does Data First Coaching approach this?
Data First Coaching, built by Greg Allan, starts from the plasterer's own job and finance data through the Trade Business Intelligence rather than from a licence checklist. It looks at what each job actually cost once registration, cover and compliance are counted, and compares that against what the square metre rate assumed, so the real gap between markup and margin shows up in the numbers rather than being guessed at. That's often where the problem is found to start, not in the licence itself but in a rate that never moved on. The how, working out where that rate needs to change, is worked through inside the Academy, with members, because the Trade Business Intelligence is powered by every member for every member.
Looking for a business coach who starts from your numbers? Plasterer Business Coach or every answer for plasterers.
