BASIX & NatHERS FAQ

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A BASIX certificate is mandatory for all new residential developments in NSW. It proves your design meets sustainability targets for energy, water, and thermal comfort. Without it, you cannot lodge your DA or CC. Check our article in our knowledge hub for more information. 

With Assessify, most BASIX certificates are delivered within 24–48 hours, depending on project complexity.

Costs vary by project type (house, granny flat, duplex). Assessify provides transparent pricing with no hidden fees. Check out our services page to organise a complimentary quote for your project.

Yes. BASIX applies to new homes, granny flats, and major renovations over $50,000 

NatHERS measures the thermal performance of your home design on a scale from 0 to 10 stars. A higher rating means lower energy bills and greater comfort. Check out our article in our knowledge hub titled NatHERS assessments at design stage. 

Smart design choices—like glazing, insulation, shading, and orientation—help boost your rating. Assessify’s guides and checklists make this simple. 

We would recommend to engage us early in the design to ensure this does not happen. 

Assessify provides clear recommendations to adjust your design (e.g., insulation upgrades, window changes) so you pass without costly redesigns.

Yes. Early compliance checks save time, reduce costs, and avoid delays. 

Assessify specializes in design‑stage compliance.

Homes above 7 stars are more comfortable, cheaper to run & are future‑proofed against stricter regulations.