By Greg Allan, tradesman and creator of Data First Coaching
What registration does a glazing business need to start trading in New Zealand?
A glazing business trading in New Zealand needs to be registered as a legal structure before it can invoice a customer, order glass or sign a lease on a workshop. If the business trades as a company, Business.govt.nz says the owner must register, or incorporate, with the Companies Office, and that registration automatically issues a New Zealand Business Number, the NZBN, which becomes the identifier used across invoices, insurance work and supplier accounts. Starting a company
If the glazier trades as a sole trader rather than a company, the same NZBN can still be obtained. WorkSafe's guidance on supplier registration notes that an owner trading as a sole trader can register through the Companies Office to get an NZBN. Registering as a supplier
Either way, this is the starting point, not the finish. A glazier fitting shower screens, splashbacks, mirrors and reglazing jobs out of a van may need nothing more than that registration to open the doors. A glazier bidding on commercial shopfront fit outs, double glazing replacement on multi storey buildings, or balustrades tied into a building's frame sits in a different part of the rulebook, covered below.
Does a glazier need a building licence to install windows, shopfronts or balustrades?
Not for every job, but some glazing work falls under restricted building work, which by law must be carried out or supervised by a Licensed Building Practitioner. The Building Act 2004 says restricted building work must be carried out or supervised by licensed building practitioners who are licensed for that type of work. Restricted building work provisions
MBIE's own guidance describes restricted building work as work that is critical to making a home structurally sound and weathertight, covering design, carpentry, roofing, external plastering, bricklaying or blocklaying, foundations and site work. Carrying out restricted building work
The LBP Handbook describes restricted building work as work that affects a home's primary structure, weathertightness or certain fire safety design. LBP Handbook
Where a window frame, a fixed glazed panel or a balustrade is tied into a home's structure or its weathertightness, that part of the job can sit inside restricted building work, and either the glazier holds the right licence class or the work must be carried out under the supervision of someone who does. A glazier fitting a shower screen, splashback or mirror in an existing bathroom is usually working on fit out, not structure, which is a different question again, and one that depends on the job. Every building job, restricted or not, still has to meet the Building Code, according to Building.govt.nz. Restricted building work overview
Because this depends on what the job touches, not on the trade name on the van, a glazier quoting a job that could be restricted building work should check with Building.govt.nz or the Licensed Building Practitioners scheme directly before pricing it.
What rules apply to safety glass and toughened glass a glazier installs?
A glazier installing safety glass needs to be able to show the glass is genuine safety glazing material, because this is checked against the product itself, not against the glazier's licence. Building.govt.nz's guidance on safety glass says checking involves looking for the name, registered trademark or code of the manufacturer or supplier, the type of safety glazing material, the standard the material was tested to, such as AS/NZS 2208, and its classification for impact test behaviour. Making sure you have safety glass
NZS 4223.3: 1999 is the standard named for safety glazing materials, and a voluntary glass register run by the Window Association of New Zealand, WANZ, is one of the places Building.govt.nz points to for checking a product, while noting that register does not cover every manufacturer of safety glass. Making sure you have safety glass
For a glazier, this means the paperwork a glass supplier provides on toughened glass, laminated glass or double glazing units is not filing to be done once and forgotten. It is evidence the glazier may need to produce again, on a different job, for a different customer, long after the install and the invoice are done.
What happens when a glazier takes on crew?
Once a glazing business hires staff, whether that is a second installer, an apprentice or someone to run measures and quotes, Business.govt.nz says the owner must register as an employer with Inland Revenue. Starting a company
That single registration opens a line of ongoing obligations: pay, KiwiSaver, leave and the records Inland Revenue expects to see, running alongside the records a glazier already keeps for every measure, quote, glass order and reglaze. Most of this paperwork is non-billable. It does not fit a shower screen or board up a broken shopfront, and it still has to be right every time, because the safety glass evidence, the LBP sign off on a job and the employer records all get asked for at different moments, often with a glass supplier's lead time or an insurance claim running at the same time.
This is where AI agents change the shape of the work rather than the rule itself. An AI agent is software that does a job the glazier's way, using their prices, their wording and their rules, so a measure, a safety glass check or a new starter's paperwork is handled the same way every time without the owner doing it from memory at the end of a busy week. Built on the glazier's own job and pay data, a data first view of the business shows which of these obligations are actually being met on time, rather than assumed to be. AI agents can be set to flag a missing safety glass certificate or an unregistered start date before the job moves on, rather than after the invoice has already gone out.
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?
- Starting a company: company and sole trader registration, NZBN and registering as an employer with Inland Revenue.
- Registering as a supplier: how a sole trader obtains an NZBN through the Companies Office.
- Restricted building work provisions, Building Act 2004: the legal requirement for licensed building practitioners on restricted work.
- Carrying out restricted building work: which trades and work types are covered.
- Restricted building work overview: the Building Code standard that applies to all building work.
- LBP Handbook: how restricted building work is defined.
- Making sure you have safety glass: checking and standards for safety glazing material.
How does Data First Coaching approach this?
Data First Coaching, built by Greg Allan, starts with the glazier's own job and pay data rather than a list of registrations to tick off. It looks at where measures, safety glass checks, LBP sign offs and employer records are actually sitting against the jobs on the board, through the Trade Business Intelligence, and finds where the real gap is, whether that is a licence question on a structural job or a record that is never filled in on time. The how of fixing that, including which agents to build and how they are set up, is worked through inside the Academy, with members, because the Trade Business Intelligence is powered by every member who brings their own data, open minded and willing to share what they learn with the rest.
