How do I choose between Deemed‑to‑Satisfy and JV3 performance methods for Section J compliance?

Short answer

Choose Deemed‑to‐Satisfy (DtS) if your design can meet NCC’s prescriptive minimums. Use JV3 (performance method) if you need flexibility in design or the prescriptive path makes compliance difficult or costly.

Full answer

The NCC provides two main pathways for achieving Section J compliance: Deemed‑to‑Satisfy (DtS) and JV3 (Performance‑based). The DtS method follows a prescriptive approach where specific benchmarks must be met for elements such as building fabric, glazing, lighting, sealing and HVAC systems. If your design satisfies or exceeds all these requirements, it is considered compliant. In contrast, the JV3 pathway compares your building’s predicted energy use to that of a reference building, allowing trade‑offs between different elements—such as offsetting less efficient glazing with enhanced insulation or high‑performance HVAC. While JV3 offers greater design flexibility, it involves more detailed energy modelling and may come with higher initial costs. The best pathway depends on your project’s complexity, the level of design flexibility required, budget considerations and your tolerance for compliance risk.

Why this matters

Submitting plans without a required Section J Report can lead to approval delays or outright rejection. Identifying the need for compliance early helps you plan and budget for any necessary design adjustments and reporting costs. It also allows Section J requirements to be integrated into the project from the start, promoting better energy efficiency and avoiding costly design changes or retrofits later in the process.

How Certified Energy can help

We assess your design early in the process to determine whether the Deemed‑to‑Satisfy (DtS) or JV3 performance pathway is better suited to your project’s needs. Our team can carry out detailed energy modelling for JV3 or validate your design against the DtS provisions to ensure compliance. We deliver accurate, council‑ready documentation regardless of the method chosen, and we work closely with you to strike the right balance between design aesthetics, functionality and regulatory compliance.

Related regulations

• NCC Section J performance requirements vs Deemed‑to‑Satisfy provisions.

• State / territory specific variations or amendments affecting use of DtS and JV3.

Helpful resources 

• What is a Section J Report and why is it required?

• When is a Section J Report Required?

• Common Mistakes in Section J Reports

• Cost and Timeline for Section J Reports