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Rules Mate

Do construction (residential and commercial) businesses need to comply with NSW Design and Building Practitioners Act 2020?

A computed answer from the Rules Mate applicability engine, with the exact condition, the outcome for every structure and size, and the primary source.

Short answer: Only if

Only if you design or build Class 2 (apartment) buildings. Being in this industry makes the obligation worth checking (Industry: Construction (residential & commercial)), but the trigger is a fact the industry alone does not settle.

The obligation in brief

Comply with NSW Design and Building Practitioners Act 2020. The Design and Building Practitioners Act 2020 (NSW) requires design practitioners, building practitioners and professional engineers to be registered to work on regulated buildings, and makes them declare that designs and completed work comply with the Building Code of Australia. It first applied to class 2 buildings (multi-unit apartments and mixed-use buildings with a class 2 part) and, from 3 July 2023, to certain new class 3 and 9c buildings (class 3 shared residential buildings and class 9c residential care buildings such as aged care); alteration and renovation work on existing class 3 and 9c buildings comes under it from 1 July 2028.

Trigger: Preparing regulated designs for, or carrying out or contracting to carry out building work on, a class 2, 3 or 9c building (or a building with such a part) in New South Wales.

Why construction (residential & commercial) get a different answer

Rules Mate runs its applicability engine across 9 business structures and 6 size bands for each of the 35 industries it maps. For 34 of those industries the answer for "Comply with NSW Design and Building Practitioners Act 2020" is no. Construction (residential & commercial) is one of the 1 where the answer is different: only if.

The deciding fact for construction (residential and commercial) businesses: Industry: Construction (residential & commercial); applies only if you design or build Class 2 (apartment) buildings.

About the industry: Builders, contractors, and subcontractors covered by the Building & Construction General On-site Award and high-risk WHS.

Compare a professional services (general) business with 6–19 employees structured as a Pty Ltd company: the obligation does not apply (Requires a trigger outside this questionnaire).

Answer by business structure and size

Each cell is the engine's outcome for a business in construction (residential & commercial) with that structure and size, assuming it sells to consumers and small businesses and holds customer contact details. "Check" means the obligation turns on a fact the industry does not settle.

"Comply with NSW Design and Building Practitioners Act 2020": outcome for construction (residential and commercial) businesses by structure and size
StructureNo employees1–5 employees6–19 employees20–99 employees100–499 employees500+ employees
Sole traderCheckCheckCheckCheckCheckCheck
PartnershipCheckCheckCheckCheckCheckCheck
TrustCheckCheckCheckCheckCheckCheck
Pty Ltd companyCheckCheckCheckCheckCheckCheck
Public companyCheckCheckCheckCheckCheckCheck
Not-for-profit (unregistered)CheckCheckCheckCheckCheckCheck
Registered charityCheckCheckCheckCheckCheckCheck
Super fundCheckCheckCheckCheckCheckCheck
Foreign companyCheckCheckCheckCheckCheckCheck

What the obligation requires

When due
Registration in the correct class before doing the work; regulated designs and design compliance declarations lodged on the NSW Planning Portal before the relevant building work starts (certifiers cannot issue a construction certificate without them); building compliance declaration and as-built designs lodged before applying for an occupation certificate; developers notify the expected date of the occupation certificate application and pay any building work levy.
Evidence to keep
Registration certificates for each design practitioner, building practitioner and professional engineer class used; regulated designs and design compliance declarations; Planning Portal lodgement records; building compliance declaration and as-built designs; contractor licence or supervisor certificate under the Home Building Act 1989 underpinning registration; builders' annual CPD records.
Maximum penalty
Building Commission NSW can issue building work rectification orders, stop work orders and (before an occupation certificate) prohibition orders that block occupation, accept enforceable undertakings, issue penalty infringement notices and audit buildings for up to 10 years after the occupation certificate. Offence penalty amounts were not verified for this entry; check the Act on legislation.nsw.gov.au
Regulator
Building Commission NSW
Jurisdiction
NSW only

Other obligations where construction (residential & commercial) differ from the norm

Questions

Do construction (residential and commercial) businesses need to comply with NSW Design and Building Practitioners Act 2020?
Only if you design or build Class 2 (apartment) buildings. Being in this industry makes the obligation worth checking (Industry: Construction (residential & commercial)), but the trigger is a fact the industry alone does not settle.
Is the answer the same for every industry?
No. For 34 of the 35 industries Rules Mate maps, the answer is no. Construction (residential & commercial) is one of 1 industries with a different answer.

Related

Sources

Computed by the Rules Mate applicability engine from the published obligation corpus; facts last checked 3 October 2026. Rules Mate is not a law firm and this is general information, not legal advice. Confirm your position with the regulator source or a qualified adviser before acting.