No. Multi‑unit residential projects (Class 2) must demonstrate that each dwelling meets BASIX requirements. A single BASIX Certificate for a detached dwelling cannot be used to cover multiple apartments or townhouses. BASIX is a mandatory requirement for residential developments in NSW.

How BASIX works for multi‑unit projects

Depending on your design and approval pathway, you may:

• Prepare individual BASIX Certificates for each dwelling; or
• Prepare a grouped approach where dwellings with identical specifications share a template that still accounts for orientation and other variables.

Evergreen Energy Consultants will recommend the most efficient pathway based on your plans, minimising duplication while ensuring every unit complies.

Practical considerations

• Orientation differences within the same building can affect thermal comfort and energy targets.
• Glazing variations between units may change performance.
• Common services (e.g., central hot water) require coordinated inputs.
• Documentation control is important so builders and certifiers can match each dwelling to the right commitments.

Why this matters

Using an incorrect certificate can cause DA rejection or require re‑issuance late in the process, delaying construction. Our coordinated approach keeps documentation tidy and compliant from the outset.

Typical workflow with Evergreen EC

1. Share architectural drawings and a unit schedule.
2. We advise the best certification structure (individual or grouped).
3. We complete the modelling and issue BASIX Certificates and any NatHERS ratings needed.
4. We provide a clean matrix so the builder and certifier can align each dwelling with the correct commitments.

Working across NSW

From boutique developments in Byron Bay to larger Newcastle and Central Coast projects, Evergreen EC brings experience with local councils and certifiers to keep your approvals moving.

Get the right certification structure

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Written by Evergreen Energy Consultants — accredited BASIX and NatHERS assessors providing residential energy assessments across NSW.