BASIX Certificate is one of several documents required to be submitted to a local government area council in NSW with every development application for an acceptable submission. An online web application tool is used to issue the BASIX certificate and the sustainability commitments and specifications addressed on the certificate must be reflected on the building plans and be deployed during construction. The nominated provisions in the BASIX Certificate are then being verified by the project's PCA before an occupation certificate is issued.
You need to supply with a current BASIX certificate for all new residential development and certain type alterations and additions in NSW when you lodge your development application. To get a BASIX certificate you need to introduce energy efficiency and sustainability measures of your development design to the online assessment tool and get a pass score. A certificate is then generated by the online tool and can be used for a DA submission. The issued and submitted BASIX certificate is then becomes a binding development documents that must be referenced and referred to during all steps of construction and commissioning and be fully deployed during the construction in order for a building to be able to achieve its final Occupation Certificate.
BASIX Certificate Structure
BASIX certificate has a certain structure which is repeated in all certificates although the format of the certificate is different for new single dwellings, new multi unit developments and alterations and additions.
There are 4 sections in each certificate as follow;
- General Description of the Project
- Schedule of BASIX commitments for water efficiency
- Schedule of BASIX commitments for thermal comfort
- Schedule of BASIX commitments for energy efficiency
For multi unit developments the last 3 sections are divided into two sections each. The first section describes commitments for each dwelling while the second section elaborates on the common area measures.
Validity Period of a BASIX Certificate
There is no set timeframe during which a BASIX certificate is valid but there are several factors that could influence the validity period of a certificate. One of them is the development application submission guidelines and checklists of each local government area council which requires that a certificate no to be older than a certain amount of time (Typically 3 months). The other element that might render a BASIX certificate invalid is frequent BCA requirements and the NSW department of planning regulation changes and the resulting updates to process and calculation criteria of the online tool.
If for any reason you are required to issue a revised or new BASIX certificate there is a chance that the same design that satisfied the BASIX requirements before do not get a pass score in the current version of the online tool. Due to these considerations it is always a good practice to submit the project to the council with as soon as a BASIX certificate is issued for the project.
How to Revise a BASIX Certificate
If you submit a BASIX certificate to the council as part of your development application the certificate can only be revised while maintaining its original certificate number and with a revision number increment. It is not possible to revoke the certificate as it becomes part of the body of legal documents forming a development application when lodged to the Council. If you want to revise an already submitted BASIX certificate you would need to provide the online assessment tool with the DA number and lodgment date of the development application as stated on the DA Notice of Determination. The revised BASIX certificate will then add a revision number increment to the original certificate number and reflects the DA number and the submission date.