Assessing Compliance in Existing Buildings
Legal Principles for Applying Evolving Codes
A recurring issue in construction defect disputes, regulatory enforcement, and expert evidence is the question of which building codes and standards apply when assessing compliance. It is a fundamental principle that the applicable regulatory framework is that which was in force at the time of building approval and construction, not the current version of the code.
However, this principle is often misunderstood or oversimplified. In practice, buildings exist within a layered regulatory environment, where historical compliance, evolving standards, and trigger-based upgrade requirements intersect.
The Governing Principle: Compliance at Time of Approval
In Australia, building work is generally assessed against the National Construction Code (NCC) (and referenced standards) as in force at the time the building approval (or construction certificate) was issued. Accordingly:
- A building may be compliant, even if it does not meet current NCC requirements.
- Allegations of “non-compliance” must be carefully framed against the correct historical code.
- Retrospective application of current standards is not automatic and is often legally incorrect.
This distinction is critical in expert witness reports, defect claims, regulatory enforcement and insurance disputes. A failure to identify the correct code version can undermine the validity of an entire compliance assessment.
The Evolution of Codes vs Non-Compliance
At first the Building Code was updated every 6 months, then every year, and now it is updated every 3 years to reduce the change impact on the industry. This evolution reflects advances in fire safety engineering, lessons from incidents and changes in construction methods and materials.
As a result, many existing buildings do not meet current NCC requirements, but remain compliant with the code at the time of construction
This creates a key legal distinction:
- Non-compliant: Does not meet the code applicable at the time of approval.
- Not up to current code: Does not meet today’s standards but may still be compliant.
Confusing these concepts is a common error in both technical and legal arguments.
When Are Upgrades to Current Codes Required?
Despite the general rule, there are several circumstances where upgrading to current standards is required.
1. Building Work Triggers Upgrades
New work on an existing building can trigger partial or full upgrades. This may occur where:
- There is a change of building classification
- There are additions or alterations
- There is a change of use affecting fire risk or occupant profile
In these cases, approval authorities may require the new work to comply with the current NCC; and/or affected existing parts to be upgraded. The extent of upgrade is typically determined by the scope of works, the impact on life safety systems and performance-based assessments
2. Fire Safety Upgrade Orders
Regulators may issue fire safety or building upgrade orders, requiring existing buildings to be brought closer to current standards. These may arise from audits, complaints, inspections, findings following incidents or policy changes targeting specific building types, for example residential care or high-risk buildings. Such orders can mandate upgrades including installing fire suppression systems, upgrading fire detections and warning systems, enhancing egress and fire compartmentation upgrades
Importantly, these requirements are not retrospective code application, but rather statutory interventions.
3. Maintenance and Essential Safety Measures
Separate from upgrade triggers, building owners have ongoing obligations to maintain essential safety measures and they remain operable and effective. A system that was compliant when installed may become non-compliant due to deterioration, or defective due to poor maintenance. This is distinct from code evolution and can independently give rise to liability.
This maintenance brings in the requirement for baseline data. Equipment must be tested to ensure it operates according to its original “as-installed” designed performance during routine servicing. Many older buildings do not have baseline data but that does not make them automatically non-compliant. AS1851-2012 states that where baseline data is not available, it should be re-established at the commencement of routine service in order to determine the performance benchmarks required.
Mixed Compliance Within a Single Building
It is increasingly common for buildings to contain multiple compliance benchmarks simultaneously. For example:
- Original building: Compliant with an older NCC version
- Extension: Compliant with a later NCC version
- Upgraded fire system: Installed to current standards following an order
This results in a hybrid compliance environment, where some elements must meet current requirements; others are assessed against historical codes; or interfaces between old and new fire systems become critical.
From an expert perspective, this requires careful segmentation of building elements, clear identification of applicable regulatory triggers and avoiding blanket compliance statements.
Implications for Legal and Expert Practice
Understanding this framework is essential when preparing expert reports and framing legal arguments.
When preparing reports, experts must:
- Identify the relevant approval date
- Reference the correct code version
- Distinguish between:
- Non-compliance
- Upgrade requirements
- Best practice or current expectations
When framing legal arguments, lawyers should avoid alleging non-compliance based solely on current standards and investigate as to whether an upgrade trigger exists. This framework is also an essential element of regulatory decision-making, as authorities must balance public safety, practicality, proportionality and legislative powers.
Conclusion
The regulatory framework governing building compliance is not static. While compliance is anchored to the time of approval, buildings are subject to ongoing obligations, evolving expectations, and targeted upgrade mechanisms.
A proper assessment of compliance therefore requires:
- Identifying the correct historical code
- Understanding when and why upgrades are triggered
- Recognising that buildings may legitimately operate under multiple compliance regimes simultaneously
Failure to apply this nuanced approach can lead to incorrect conclusions, flawed expert evidence, and ultimately, unjust outcomes.