The Transition to NCC 2025 and State Variations: What It Means for Victoria
Building regulations influence decisions long before construction begins. From fire protection and drainage to energy efficiency and material selection, understanding the applicable requirements early helps project teams prepare coordinated designs and avoid costly revisions.
Victoria adopted the National Construction Code (NCC) 2025 on 1 May 2026.
For builders, architects, developers and property owners, the transition brings updated technical requirements and changes to Victoria’s state variations. Understanding which provisions apply to your project is an essential first step.
At Part 6 Building Surveyors, we help clients across Melbourne and Victoria understand building compliance requirements and make informed decisions throughout design and approval.
Why State Variations Matter
The NCC provides Australia’s technical framework for building, plumbing and drainage work. However, its legal application depends on each state or territory’s legislation and regulations. In Victoria, this includes the Building Act 1993, Building Regulations 2018 and Plumbing Regulations 2018.
State variations modify or supplement particular national provisions. This means a compliance approach prepared for an interstate project should be checked before it is used in Victoria.
With NCC 2025, Victoria reduced its variations and additional clauses from 115 to 60 across the three NCC volumes. This brings Victorian requirements closer to the national framework, although important local provisions remain. For project teams, the practical task is to identify what has changed, which Victorian provisions still apply and whether existing specifications need updating.
Does NCC 2025 Apply to Projects Already Under Design?
The adoption date does not automatically mean every project must be redesigned.
The Building and Plumbing Commission explains that section 10(2) of the Building Act 1993 allows the relevant building surveyor to permit construction under NCC 2022 where substantial progress was made on the design before 1 May 2026. In exercising that discretion, the surveyor must have regard to Minister’s Guideline MG-13. Supporting evidence may include design contracts or planning applications.
The ability to use an earlier NCC edition should be assessed and documented for the individual project.
Simply having discussed a development before the adoption date should not be treated as confirmation that an exemption applies. If your project spans the transition, speak with your building surveyor before finalising drawings, consultant reports or tender documentation. Establishing the applicable edition early gives the design team a clear basis for its work.
Key NCC 2025 Changes Affecting Victorian Projects
Water Management and Waterproofing
NCC 2025 strengthens water management provisions for commercial and Class 2 buildings, including apartment developments. The changes address sub-surface water management and build on requirements for exposed surfaces such as balconies.
Project teams should review how drainage, waterproofing and architectural details work together. Resolving these interfaces during design can help prevent conflicting documentation and difficult changes during construction.
Car Park Fire Safety
Updated provisions expand sprinkler requirements for a broader range of car parks and restrict some existing concessions. These changes respond to the changing composition of vehicles, including greater use of plastics and electronic systems. For developments incorporating car parking, fire protection requirements should be checked before layouts and services arrangements are locked in.
Commercial Energy Efficiency
NCC 2025 introduces strengthened commercial energy efficiency provisions, including changes to building envelopes, services and on-site solar photovoltaic systems. The scope depends on the building classification and applicable provisions, so requirements should be assessed specifically for each development. An early assessment helps coordinate glazing, insulation, mechanical services, lighting and roof space. It also gives the project team a clearer understanding of the design and budget implications.
Lead-Free Plumbing Products
Victoria retained 1 May 2026 as the commencement date for its lead-free plumbing requirements. Relevant copper alloy plumbing products that contact drinking water must be WaterMark certified and carry the Lead Free WaterMark logo. The requirements apply to relevant plumbing work commencing on or after that date.
The Victorian Government states that this requirement applies regardless of when the building permit was issued or the contract was signed. Product selection therefore needs a separate check, even where a project’s building design can proceed under an earlier NCC edition.
Performance Solutions and Victorian Limitations
Performance Solutions provide a pathway for demonstrating compliance where a design departs from the NCC’s prescriptive Deemed-to-Satisfy provisions.
Victoria retains specific limitations, including restrictions concerning certain combustible cladding requirements. New Victorian limitations relating to structural Performance Solutions under B1P1(2) and H1P1(2) take effect one year after adoption, on 1 May 2027.
Where a project relies on a Performance Solution, the assessment pathway, supporting evidence and applicable commencement dates should be established with the relevant consultants and building surveyor.
How to Keep Your Project Moving
A practical NCC transition review should answer five questions:
Which NCC edition applies? Confirm the project’s compliance basis and any proposed transitional exemption.
Which Victorian variations are relevant? Check the provisions against the building classification and proposed work.
What needs updating? Review drawings, specifications, consultant reports and product schedules.
Are the disciplines coordinated? Resolve interfaces between architecture, structure, fire protection, drainage and building services.
What evidence is required? Identify the documentation needed to support the building permit assessment.
This approach helps turn regulatory changes into clear design actions. It also allows compliance issues to be addressed while the project still has flexibility.
Navigate NCC 2025 with Part 6 Building Surveyors
Part 6 Building Surveyors provides NCC advisory, building compliance reporting and performance and compliance consulting across Melbourne and Victoria. We support clients working through complex requirements with practical guidance suited to their projects.
Whether you are planning a commercial development, education facility or residential project, early advice can help you understand how NCC 2025 and Victoria’s variations affect your next steps.
Build clarity into your project from the beginning. Contact Part 6 Building Surveyors to discuss your NCC compliance requirements.
