The NSW Design and Building Practitioners Act 2020 (DBPA) requires registered practitioners to issue signed declarations confirming that their regulated designs and building work comply with the Building Code of Australia. For facade work, this means the days of loosely documented product selection and informal compliance arguments are over. Practitioners carrying personal liability need clear, product-specific evidence - and that changes what they expect from suppliers.
This article covers what the DBPA requires for facade-related work, how the declaration system works in practice, and what it means for the documentation flowing between suppliers, installers, and design practitioners.
What is the DBPA and why does it matter for facades?
The Design and Building Practitioners Act 2020 came into force progressively from 2020, with the full regulated design and compliance declaration framework operational from 1 July 2021. It applies to Class 2 buildings (apartment buildings) and buildings with a Class 2 part - effectively most multi-storey residential construction in NSW.
The Act was a direct response to the building quality and safety issues exposed by incidents like the Opal Tower and Mascot Towers. The central idea is straightforward: the people who design and build Class 2 buildings must be registered, must declare that their work complies with the BCA, and must carry professional indemnity insurance. There is no more hiding behind corporate structures or passing the compliance question down the chain.
For facades specifically, the DBPA matters because external wall cladding and waterproofing are regulated design categories. A registered design practitioner must prepare the design, and they must personally sign a design compliance declaration before a construction certificate or complying development certificate can be issued.
What are design compliance declarations?
A design compliance declaration (DCD) is a formal statement by a registered design practitioner confirming that the regulated designs they have prepared comply with the BCA. The declaration is lodged on the NSW Design and Building Practitioners portal.
For facade work, the DCD covers the external wall system - cladding materials, fixing systems, weatherproofing details, fire performance, and structural adequacy. The practitioner signing the DCD is stating, under their personal registration, that they have reviewed the relevant evidence and are satisfied the design meets the code.
This is not a rubber-stamp exercise. The practitioner’s registration is on the line. If the design does not comply and the DCD was signed anyway, the consequences include disciplinary action, fines, and potential deregistration under Part 4 of the Act. The DBPA also introduced a statutory duty of care (Section 37) that extends to current and future owners of the building - meaning liability follows the work, not just the contract.
What this means in practice is that design practitioners have become far more demanding about the evidence they receive from product suppliers. A generic data sheet is not enough. They need test reports that name the specific product, issued by a NATA-accredited laboratory, referencing the correct Australian Standards. They need to be able to trace a direct line from the product on the drawing to the evidence in their compliance pack.
What is the building enclosure registration category?
The DBPA introduced specific registration categories for design practitioners, and one of these is “building enclosure.” This category covers the design of external walls, roofing, and waterproofing - essentially the building envelope.
A practitioner registered in the building enclosure category is the person responsible for preparing and declaring the facade design on a Class 2 project. They are the ones who need to assess whether the specified cladding system complies with the relevant NCC provisions, whether the weatherproofing details are adequate, and whether the structural performance of the facade has been properly addressed.
Before the DBPA, there was no formal registration requirement for the person designing a building’s facade. An architect might handle it, a facade engineer might handle it, or in some cases, the installer’s shop drawings were the closest thing to a formal design. The DBPA closed that gap by requiring a registered practitioner with relevant qualifications to take personal responsibility.
This is a significant shift. It means the person signing off on the facade design is identifiable, accountable, and insured. And it means they are personally incentivised to be thorough about the products they specify and the evidence they rely on.
What are building compliance declarations?
Building compliance declarations (BCDs) sit on the construction side. A registered building practitioner must issue a BCD before an occupation certificate can be issued, confirming that the building work has been carried out in accordance with the regulated designs and complies with the BCA.
For facade installers, the BCD framework means the as-built work needs to match the declared design. If the installer substitutes a product, changes a fixing detail, or deviates from the approved facade design, that creates a compliance gap. The building practitioner issuing the BCD needs to either confirm the work matches the design or ensure any variations have been assessed and declared by the relevant design practitioner.
This has practical implications on site. Product substitution - which historically happened frequently in facade work, sometimes without formal approval - now carries clear regulatory risk. If the installed cladding does not match the declared design, the BCD cannot be issued, and the occupation certificate is held up.
How does the DBPA interact with the NCC on combustibility?
The DBPA does not replace the NCC. The NCC remains the technical standard that defines what “complies” means. What the DBPA does is create an accountability and enforcement framework around it.
Under the NCC’s Deemed-to-Satisfy provisions (C2D10), external wall cladding on Type A and B construction generally needs to be non-combustible, tested to AS 1530.1. That requirement has existed for years. What the DBPA adds is a registered practitioner who must personally declare that the specified product meets that requirement, based on proper evidence.
This is also where the PE core issue becomes relevant. Aluminium composite panels with a polyethylene core greater than 30% are banned for use as external cladding in NSW under the Environmental Planning and Assessment (Development Certification and Fire Safety) Regulation. The DBPA’s declaration framework reinforces this by requiring the design practitioner to confirm, on the record, that the specified cladding is compliant. Specifying a non-conforming product is not just a code breach - it is a personal compliance failure for the practitioner who signed the DCD.
For solid aluminium and extruded aluminium products, this is a non-issue. These materials are inherently non-combustible - there is no PE core, no combustible filler, no ambiguity. A CSIRO test report to AS 1530.1 confirming non-combustibility is the clean, direct evidence a design practitioner needs to support their declaration.
What documentation do practitioners actually need from suppliers?
Under the DBPA framework, the quality of supplier documentation has moved from “nice to have” to “essential.” A design practitioner preparing a DCD for a facade needs to assemble evidence that directly supports each compliance claim. Generic product brochures do not meet that standard.
What practitioners are looking for:
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AS 1530.1 non-combustibility test reports - NATA-accredited, naming the specific product. For Valmond & Gibson products: interloQ is covered by CSIRO report FNC12595, element13 by CSIRO report FNC12545.
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AS/NZS 4284 weather performance test reports - demonstrating the system has been tested for water penetration, air infiltration, and structural performance under relevant pressures. Both interloQ and element13 have been tested by Ian Bennie & Associates (NATA #2371).
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Structural test data - wind load capacity, fixing specifications, and span tables that allow the facade engineer to confirm the system works for the specific project.
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Compliance packs - pre-assembled documentation packages that map test evidence to NCC clauses, making it straightforward for the practitioner to build their compliance case.
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Product-specific technical manuals - not generic aluminium data, but documentation for the actual system being specified, including installation methodology, tolerances, and maintenance requirements.
The 165CW unitised curtain wall system, designed and extruded in Australia, comes with its own technical manual (188 pages) and conformance documentation covering AS/NZS 1170, AS/NZS 1866, AS/NZS 4284, and AS 3715.
The key principle is traceability. A practitioner must be able to draw a line from the product on the drawing, through the test report, to the NCC clause. If any link in that chain is missing or ambiguous, the declaration is at risk.
What does this mean for installers?
Installers working on Class 2 projects in NSW need to understand that the DBPA has changed the compliance environment around them, even if they are not the ones signing declarations.
First, product substitution without formal design amendment is now explicitly risky. If the installer sources from a different supplier or uses a different product than what was declared in the DCD, the building practitioner will not be able to issue the BCD until the discrepancy is resolved. That resolution requires the design practitioner to review and re-declare - adding time and cost to the project.
Second, installers should expect to provide evidence that the products they have actually installed match the declared design. This might include delivery dockets, batch numbers, or supplier confirmations. The paper trail matters more than it used to.
Third, choosing suppliers who provide proper compliance documentation is no longer just about professionalism - it is about keeping the project moving. If the supplier cannot provide NATA-accredited test reports, compliance packs, and product-specific technical data, the design practitioner may refuse to specify the product, or the building practitioner may flag a compliance issue during construction.
Is this just a NSW issue?
The DBPA is NSW legislation, and the design and building compliance declaration framework is specific to NSW. However, it would be a mistake to treat it as an isolated development.
Queensland has its own registration framework under the Building and Construction Legislation (Non-conforming Building Products) Amendment Act, and the Queensland Building and Construction Commission (QBCC) has been tightening its requirements for registered professional engineers involved in building work.
Victoria’s building regulatory reform is ongoing, with the Victorian Building Authority (VBA) progressively strengthening registration, documentation, and accountability requirements following the cladding audit program.
The general direction across Australian states is toward more personal accountability, more documentation, and more rigorous evidence of compliance. What NSW has done with the DBPA is the most structured version so far, but the underlying principles - registered practitioners, signed declarations, traceable evidence - are the direction the entire industry is heading.
Practitioners and suppliers who build their documentation and compliance systems to the NSW standard will be well positioned as other states follow.
The practical takeaway
The DBPA has made facade compliance documentation a personal liability issue for registered practitioners in NSW. This is not a bureaucratic inconvenience - it is the mechanism the state government chose to rebuild trust in the building industry after a series of high-profile failures.
For anyone specifying, supplying, or installing facade products on Class 2 buildings in NSW, the practical response is straightforward: use products with clear, traceable compliance evidence; work with suppliers who provide NATA-accredited test reports and pre-assembled compliance packs; and keep the documentation chain intact from specification through to installation.
The products that move easiest through the DBPA framework are the ones where the compliance case is simple and direct. Solid aluminium and extruded aluminium facade systems - non-combustible by nature, tested to the relevant Australian Standards, and supported by product-specific documentation - make the practitioner’s job easier. And in a regulatory environment where that practitioner is personally accountable, making their job easier is how projects keep moving.
Related Reading
- Combustible Cladding Bans by Australian State: 2026 Update
- Evidence of Suitability Under NCC 2022: What Certifiers Actually Need
- How to Build a Compliant Facade Documentation Pack
- Why Facade Substitution Claims Cause Project Delays
Last updated: 4 April 2026