Most Asked Questions

Let us know upfront when you require the assessment to be completed.

Turnaround depends on the size and complexity of the dwelling and ranges from around a week for individual houses and one to two weeks for multi-unit properties.

Of course, we can provide faster turnaround to meet tighter timeframes, just let us know.

We’ll need the final full set of the plans to be submitted to council in PDF format including:

  • Site plan (showing north point)
  • Floor plan
  • Elevations
  • Window schedule
  • Lighting plan (preferred)
  • Materials used in construction


A BASIX certificate is valid for three months prior to submission to the council or accredited certifier.

Once lodged, it is valid for the maximum life of the development application.

It’s a good idea to have the BASIX completed once the design is finalised and ready for lodgement.

If your design does not pass BASIX, we’ll discuss your options and our recommendations to ensure it passes.

Simply select those most suitable for you, include them in the design plans and we’ll prepare a new assessment and the certificate.

The NSW Department of Planning charges fees for issuing BASIX Certificates. These vary depending on the type of development:

  • Single Dwelling: $50
  • Multi-dwelling: $80 for the first two and $35 for each additional dwelling
  • Alterations and additions: $25 for each dwelling
  • Residential flats and units: Varies, depending on the number of units.


There is no additional cost as long as it relates to the same property within the project recorded on the original certificate. It must also be lodged or be valid to be lodged with a consent authority.