40,000 New Products: NZ Building Inspector's Guide

What Is NZ's Building Product Register?

For any building inspector in NZ, MBIE's Building Product Register is now a core reference point — and it just got substantially larger. The recent addition of approximately 40,000 products to the register marks one of the most significant shifts in NZ product compliance in recent years, with real implications for how inspectors document their findings and manage liability.

The register was established under the Building (Building Products and Methods, Modular Components, and Other Matters) Amendment Act 2021, a package of reforms to the Building Act 2004 that directly addressed accountability gaps exposed by the leaky-homes crisis. The amendments introduced formal product declaration requirements, placing an obligation on manufacturers and importers to publish technical information about how their products meet the Building Code.

The register functions as a publicly searchable disclosure tool, not a certification scheme. It is distinct from CodeMark certification — which involves independent third-party scheme auditing — and from BRANZ Appraisals, which provide independent technical assessment of product performance. What the register captures is what manufacturers have formally declared about their own compliance pathways.

Product categories now covered include exterior cladding, insulation, plumbing fittings, structural connectors, and fixings — components that appear in almost every residential and light commercial inspection.

Why 40,000 New Products Changes the Game for Every Building Inspector in NZ

A register of this scale creates a genuine knowledge-management challenge. No inspector can hold 40,000 product listings in memory. What matters is understanding which categories carry the most compliance risk and building a systematic verification habit around those categories on every inspection.

The register is also a living document. Products are added, updated, and occasionally removed. A product listed six months ago may have had its declaration revised since your last check. Expired certifications, superseded product versions, and unlisted products appearing under legitimate-looking brand packaging are all practical risks encountered in the field.

The professional liability implications are clear. When a consent authority, subsequent owner, or insurer identifies a non-compliant product in a property, the question directed at any inspector who assessed that property is the same: what did you check, and what did you record? Inspectors who can demonstrate they searched available compliance records and documented the outcome are in a far stronger position than those with no record of a check at all.

The product categories most likely to affect day-to-day residential inspections include:

• Exterior cladding systems — particularly monolithic and panel systems where CodeMark or BRANZ Appraisal status is material to weathertightness risk
• Plumbing fittings — especially fittings in contact with drinking water, which have specific verification requirements
• Structural connectors and fixings — particularly in subfloor and framing systems built to NZS 3604
• Insulation products — R-value declarations and fire-performance data
• Window and glazing systems — joinery CodeMark status and weather performance ratings

How to Search and Verify the Register During Inspections

Searching the register is straightforward in process. The discipline is doing it consistently, for every inspection, in the categories that matter.

Step 1: Identify the product on-site. Record the manufacturer name, product name, and any batch or lot code visible on the label or packaging. Photograph the label while you are at the location.

Step 2: Search the MBIE register. Go to building.govt.nz and use the building products search function. You can search by manufacturer, product name, or product category.

Step 3: Record the outcome — including not-found results. If the product is listed, note the declaration date and any stated limitations on use. If it is not found, document that a search was conducted at the time of inspection and returned no result. A "not found" outcome does not automatically mean non-compliance, but it does warrant further verification before the item can be cleared.

Step 4: Cross-reference parallel verification tools where relevant:

• CodeMark certificates — third-party scheme certification confirming a product meets specified Building Code provisions; certificates are searchable through MBIE
• BRANZ Appraisals — independent technical assessments confirming performance when a product is used as specified; searchable via the BRANZ Appraised Products Register at branz.co.nz
• Manufacturer statements of compliance — a formal self-declared pathway under the 2021 amendments, where the manufacturer takes direct responsibility for the compliance claim

When a product is genuinely unlisted, or when a CodeMark or Appraisal has clearly expired, record this in your report. Where the risk warrants it — particularly for weathertightness or structural products — refer the matter to the consent authority for investigation.

Practical Strategies for Building Inspectors in NZ to Stay Current with the Register

Keeping pace with a register of this size requires building a habit rather than relying on memory.

Subscribe to MBIE Building Performance updates. MBIE publishes sector newsletters and change notifications for the register. Subscribing directly means material updates reach you as they happen, rather than being discovered mid-inspection.

Build a firm-level product reference library. For the products your inspections encounter most frequently — the dominant cladding systems in your market, common subfloor connector brands, standard plumbing fittings on new builds — maintain a running reference document. Record the register entry, CodeMark or Appraisal number, and the last date you verified status. Review it quarterly.

Engage with professional bodies. The NZ Institute of Building Inspectors (NZIBI) provides a forum for sharing product intelligence across the inspector community. NZCB and ADNZ members encounter products from the builder and designer perspective — cross-sector information sharing surfaces issues faster than any single inspector could identify alone.

Allocate CPD time specifically to product register updates. This is an ongoing obligation, not a one-time exercise. As the register grows and product declarations are revised, treating register literacy as a recurring CPD priority is a reasonable professional expectation.

Inspectors who also work in Australia should note the parallel compliance framework on the other side of the Tasman. CodeMark Australia and WaterMark — both administered by the Australian Building Codes Board (ABCB) under the National Construction Code — serve similar functions to NZ's CodeMark and product declaration pathways. The documentation discipline is the same in both markets: record what you checked, what you found, and what you could not verify.

Liability, Reporting, and What the Law Expects of a Building Inspector

The Building Act 2004 assigns responsibility for Building Code compliance to consent authorities and licensed building practitioners. For inspectors conducting pre-purchase or progress inspections, the liability exposure is professional — turning on whether the inspection was competently conducted and documented to an appropriate standard.

The clearest protection available to any inspector is a well-structured report that:

• Documents what was checked — including product labels photographed and register searches conducted on-site
• Records what was found — noting CodeMark or BRANZ Appraisal references where applicable
• Notes what was not found or not verifiable — with the specific reason for each limitation
• Makes clear recommendations — referring unverified high-risk products to the consent authority or a qualified specialist where the risk warrants it

Scope-of-inspection language matters. Your inspection agreement and report should clearly state that product compliance verification is limited to a visual check of accessible products and a register search for those identified — not a comprehensive audit of all materials in the building. Specific limitation language provides professional protection; generic disclaimers buried in boilerplate do not.

Disputes arising from missed product compliance tend to follow a pattern: a cladding system installed outside its CodeMark use limitations; an unlisted structural connector identified during a subsequent local authority inspection; insulation with an expired appraisal at the time of consent. In each case, the inspector is asked one question — what did you check, and what did you record?

How Technology Can Support Product Compliance Documentation

Mobile inspection tools can embed product verification prompts directly into the sections where they are most relevant — cladding, subfloor structure, insulation, plumbing — surfacing the check at the right point in the inspection workflow rather than relying on end-of-inspection recall.

Photo capture plays a central role. Noting product labels, batch codes, and certification marks in commented photos on-site — with descriptions of what was found or could not be verified — creates a clear field-level documentation record that supports your written findings. This approach is considerably more defensible than a text reference written hours after leaving the property.

InspectPro is a mobile building inspection app designed for NZ and Australian inspectors, built around a structured, section-based workflow. Available on iPhone via the App Store, the app is designed to help building inspectors in NZ add comments and severity ratings to photos, organise findings by inspection section, and generate a professional PDF report — all without requiring an internet connection. All inspection data stays on your device.

Configurable sections can be set up around the product categories most relevant to your inspection type. A preset comment library may help you record consistent product-related observations quickly and accurately across multiple inspections. Reports are stored on-device and can be delivered to clients via a secure download link — no app required on the client's end.

Because the section structure is customisable, a firm can configure it once around the product categories most relevant to their work and use that same structure across inspections for consistent documentation.

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Frequently Asked Questions

What is the MBIE Building Product Register and must I use it as an inspector?

The MBIE Building Product Register is a publicly searchable database of building products and their declared compliance pathways, administered by MBIE's Building Performance team at building.govt.nz. It was established under the Building (Building Products and Methods, Modular Components, and Other Matters) Amendment Act 2021. There is no statutory obligation on a building inspector to search the register during every inspection. However, failing to check products in high-risk categories — and document the outcome — creates professional liability exposure if non-compliance is identified after your inspection.

How is CodeMark different from a product listing on the MBIE register?

CodeMark is a third-party certification scheme where an accredited certification body independently audits and certifies that a product meets specified Building Code provisions. A listing on the MBIE Building Product Register means the manufacturer has made a formal declaration about their product's compliance pathway — a self-declared mechanism rather than an independently audited one. BRANZ Appraisals represent a further, separate pathway providing independent technical assessment by BRANZ. In practice, inspectors may encounter products with any combination of these credentials, or none at all.

What should I record in my report if a product is not found on the register?

Document it specifically. Record the product name, manufacturer, and the fact that a register search at the time of inspection returned no result. Note any CodeMark or BRANZ Appraisal search outcomes. If the product is in a high-risk category — exterior cladding, structural connectors, or waterproofing — recommend that the client seek advice from the consent authority or a qualified specialist before proceeding. A clear, specific limitation note is far more defensible than a generic disclaimer.

Do Australian product compliance obligations apply if I also inspect in Australia?

Australia uses a parallel but distinct system. The National Construction Code (NCC) sets overarching performance requirements. CodeMark Australia and WaterMark are the primary third-party certification pathways, administered by the Australian Building Codes Board (ABCB). Additional state-specific requirements apply, particularly in Queensland, Victoria, and New South Wales. Inspectors working across both markets should maintain working familiarity with both compliance frameworks — the documentation discipline, however, is identical on both sides of the Tasman.

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