Understanding the Design and Building Practitioners Act 2020 (NSW)
The Design and Building Practitioners Act 2020 (NSW) (“DBP Act”) was introduced by the NSW Government to improve the quality, accountability, and compliance of the building industry following a number of high-profile building defect issues across New South Wales. The legislation aims to restore confidence in the construction sector by imposing stricter obligations on architects, engineers, builders, designers, and other practitioners involved in the design and construction process.
Why Was the DBP Act Introduced?
The Act was created in response to growing concerns regarding defective building work, non-compliant construction practices, and inadequate documentation within the NSW construction industry. The legislation focuses heavily on ensuring that building work complies with the National Construction Code (NCC) and that accountability exists throughout all stages of design and construction.
Who Does the Act Apply To?
The DBP Act applies to a broad range of construction industry professionals involved in regulated building work, including:
Architects
Building designers
Builders and building practitioners
Professional engineers
Waterproofing designers
Structural and façade consultants
Principal Design Practitioners (PDPs)
Developers and project managers with substantive control over works
The Act introduced mandatory registration requirements for many practitioners carrying out regulated design and building work in NSW.
Key Requirements Under the DBP Act
Registered Practitioners
Certain practitioners must now be formally registered under the NSW DBP scheme before carrying out regulated work or issuing compliance declarations.
Regulated Designs
Before construction commences, regulated designs relating to critical building elements must be prepared and declared compliant by registered design practitioners. These designs are then lodged through the NSW Planning Portal.
Examples of regulated designs may include:
Waterproofing systems
Structural systems
Fire safety systems
Building enclosure systems
Mechanical, hydraulic, and electrical services
Performance solutions under the NCC
Design Compliance Declarations
Registered design practitioners must provide declarations confirming that their designs comply with the Building Code of Australia and relevant standards.
Building Compliance Declarations
Before an Occupation Certificate can be issued, the building practitioner must declare that the building work has been completed in accordance with the declared regulated designs.
Statutory Duty of Care
One of the most significant aspects of the DBP Act is the introduction of a statutory duty of care. Under the legislation, anyone carrying out construction work has a legal obligation to exercise reasonable care to avoid economic loss caused by defects. This duty extends to current and future property owners.
Importantly, this duty of care may apply retrospectively to certain building work completed prior to the legislation commencing.
NSW Planning Portal & Declared Designs
The DBP process is closely linked with the NSW Planning Portal. Practitioners are required to upload:
Regulated designs
Design compliance declarations
Variations to regulated designs
Principal compliance declarations
Building compliance declarations
This creates a transparent digital record of compliance documentation throughout the project lifecycle.
Why the DBP Act Matters
The DBP Act has fundamentally changed the way building projects are documented and delivered in NSW. The legislation places greater emphasis on:
Detailed and coordinated documentation
Professional accountability
NCC compliance
Risk management
Quality assurance during construction
For developers, builders, consultants, and strata owners, compliance with the DBP framework is now a critical component of project delivery in New South Wales.
How Professional Consultants Assist
Many projects now require experienced Design Practitioners and Principal Design Practitioners to coordinate declared designs, compliance documentation, and Planning Portal submissions. Professional consultants can assist with:
DBP compliance advice
Declared design preparation
Coordination of consultant declarations
NSW Planning Portal lodgements
Waterproofing and façade compliance reviews
Remedial building compliance documentation
Construction Certificate and Occupation Certificate support
As the legislation continues to evolve, engaging experienced DBP consultants early in the design and construction process is becoming increasingly important to minimise project risk and ensure compliance.