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BCA Consulting Services Explained: From Due Diligence to Completion
The 2025 Strata Defects Research Report says 36% of buildings with serious defects were reported to the regulator. In 2021, it was only 21%.
If you find a Building Code of Australia (BCA) compliance problem before buying a property, you can either renegotiate or find a good solution. But if you find the same problem after construction begins, it can slow down the whole project and be very expensive.
The point at which you engage a BCA consultant therefore changes the question they need to answer. Can this property support what we want to do? Does this design meet the NCC requirements? What compliance issues already exist in this building? How can a proposed design demonstrate compliance when the standard pathway does not fit?
These are different questions, so they require different types of BCA consulting services. In the sections that follow, we will discover how each BCA consulting service supports your project at the right stage and helps you make informed decisions.
The Right BCA Assessment Depends on Where Your Project Is
Match the BCA consulting service to the decision you are actually making at that point in the project. Not every project needs every service. The building, its proposed use, the design, the approval pathway, and the existing conditions decide what is appropriate.
| Project Stage | BCA Service | What You Need to Establish |
|---|---|---|
| Property acquisition or feasibility | BCA Due Diligence | Potential compliance risks and development constraints |
| Design development | BCA Design Review | Whether the proposed design addresses applicable NCC requirements |
| Existing building assessment | BCA Audit | Current compliance gaps, risks, and possible upgrade requirements |
| Complex or unconventional design | BCA Performance Solution | An appropriate pathway for demonstrating NCC compliance |
| Construction | BCA Inspection | Whether relevant building elements reflect the documented compliance approach |
| Completion | Completion Statement | Supporting documentation for the relevant certification process |
Check What the Building Can Support Before Investing
A property can seem suitable for development at first, based on its location, size, and current use. However, once you consider the building’s compliance requirements, a different set of factors comes into play.
A change of use can shift the building’s classification. Existing fire safety provisions may need to be upgraded, or new accessibility requirements could constrain the proposed layout. Previous alterations might also leave unresolved questions about the building’s approval history.
This is where a BCA due diligence assessment becomes essential. It examines compliance issues before any major property or development decision is made. Such an assessment considers the existing building, available approvals, proposed use, and potential compliance constraints together.
It highlights what warrants a closer look before you commit to a purchase, lease, or development strategy.
As the Design Develops, Check What the NCC Requires
Once the project moves from feasibility into design, the focus shifts to the specific NCC requirements that apply to the proposed building. At this stage, a BCA design review assesses the architectural documentation against the requirements that apply to the proposed building.
The review begins by establishing the building characteristics that determine which NCC provisions apply, including building classification, rise in storeys, effective height, and type of construction. Depending on the project, this can include:
- Fire separation and fire-resistant construction
- Exits and travel distances
- Accessible paths of travel
- Sanitary facilities
- Emergency egress
- Smoke hazard management
- Building services and relevant fire safety provisions
The purpose is to identify compliance issues while there is still an opportunity to address them through the design. A BCA design review can also identify areas where the Deemed-to-Satisfy provisions do not suit the proposed design. The project team can then consider whether to modify the design or develop a Performance Solution to demonstrate compliance with the relevant NCC Performance Requirements.
Find BCA Issues Before They Reach Approval
An independent BCA design review can identify compliance concerns and required changes while you are still developing your design.
Review Your Design →For Existing Buildings, Identify Compliance Gaps First
A BCA audit assesses an existing or completed building in its current condition, identifying compliance gaps, potential upgrade requirements, and other building regulation risks. It is particularly worthwhile when:
- An owner is planning refurbishment or redevelopment
- A property is being considered for acquisition or leasing
- Previous alterations are not fully documented
- Existing compliance concerns have been raised
- An asset manager needs to understand potential upgrade obligations
Throughout the audit, the assessment considers the building’s existing condition alongside available approvals, drawings, and compliance documentation. For an alteration project, this approach allows the audit to establish the existing position before assessing the proposed work. This sequence helps the architect and development team better understand how the new design will interact with the existing building.
When the Standard NCC Pathway Does Not Fit
Most projects will use the NCC’s Deemed-to-Satisfy provisions for at least some aspects of the design. However, some designs require a different approach. The NCC recognises Deemed-to-Satisfy Solutions, Performance Solutions, or a combination of both as compliance pathways. Regardless of the pathway, all solutions must satisfy the applicable Performance Requirements.
A BCA Performance Solution may be appropriate when the proposed design does not follow a particular Deemed-to-Satisfy provision. This situation can arise in complex buildings, unusual existing conditions, or designs where the standard provisions do not suit the intended outcome. To address these situations, the process can include:
- Identifying the relevant Performance Requirements
- Preparing a Performance-Based Design Brief
- Selecting appropriate assessment methods
- Obtaining the required evidence or analysis
- Documenting how the proposed solution demonstrates compliance
The Australian Building Codes Board identifies evidence of suitability, Verification Methods, expert judgement, and comparison with Deemed-to-Satisfy provisions among the methods that can be used to assess a Performance Solution. Recognising a potential Performance Solution during design gives the architect and other consultants time to coordinate the required work.
Before Completion, Check the Building Against the Design
The project team still needs to ensure that the completed building reflects the compliance position established through design documentation. Construction-stage BCA inspections can review relevant building elements as the project progresses and identify matters requiring clarification or rectification, particularly where compliance depends on details that cannot be confirmed from drawings alone.
AI Consultancy also provides BCA Inspections & Completion Statements to support the project team through construction and completion.
Practical Takeaways
The right BCA consulting service depends on where the project is. BCA due diligence helps before acquisition or commitment. A BCA design review is most useful while the design is still flexible. A BCA audit provides clarity for existing buildings. A Performance Solution addresses situations where the standard NCC pathway does not suit the design. And BCA inspections and completion statements help ensure the completed building reflects the documented compliance position.
Not every project needs all of these services. Engaging the right assessment at the right stage helps the project team identify issues early, avoid delays, and make informed decisions about how to proceed.
Get the Right BCA Advice at the Right Stage
Understand which BCA assessment fits your project before a compliance issue affects your design, approvals, or construction.
Find Your BCA Service →
FAQs
Frequently Asked Questions
What are BCA consulting services?
BCA consulting services provide advice on how the Building Code of Australia (BCA) and National Construction Code (NCC) requirements apply to a building project. Depending on the project stage, this can include due diligence, design reviews, BCA audits, Performance Solutions, inspections, and completion support.
When should I get a BCA consultant involved in a project?
It depends on what you are trying to establish. BCA due diligence can be useful before buying or developing a property, while a BCA design review is relevant once the architectural design is taking shape. Existing buildings may require a BCA audit, and construction-stage inspections can help verify relevant compliance requirements before completion.
What is the difference between a BCA audit and a BCA design review?
A BCA design review assesses proposed architectural documentation against the applicable NCC requirements. A BCA audit examines an existing or completed building to identify compliance gaps, potential upgrade requirements, and other risks. The first looks primarily at the proposed design; the second establishes the compliance position of the building itself.
Does every project need all BCA consulting services?
No. The services required depend on the building, its proposed use, project stage, existing conditions, and approval pathway. A developer acquiring an existing property may start with BCA due diligence, while a new development may primarily require design review. A complex design or existing building may require additional assessment, such as a Performance Solution or BCA audit.
