Basix Certificates

Guide to managing large project files

Calculating large project files with multiple dwellings may take several minutes. Depending on the reliability of your internet connection, there is a risk data may be lost.

To minimise the risk of lost data or corrupted project files, it is recommended that users:

  • Do not unnecessarily hit the ‘Calculate’ button at the bottom right of each page. Calculating the BASIX score for large projects can be time consuming and is of little value until all data is entered for a project.When calculating or saving be patient. Don’t navigate forward  or back, enter new data or open another project file
  • Do save the project regularly, particularly after entering a large block of project details.
  • Be patient - Do not attempt to navigate forward or back, enter new data or open another project file whilst the project is in the process of being saved or calculated.
  • Minimise other computer functions or background programs whilst a project is being saved or calculated.
  • Where appropriate, divide a large project into separable parts in accordance with the helpnote When is more than one BASIX certificate required?.
  • The default limit on the number of dwellings that can be entered is 200 for single and multi-dwelling houses and 600 units in a residential flat building. If you need to add more dwellings, please This email address is being protected from spambots. You need JavaScript enabled to view it. for assistance. Include your BASIX user account details, the project name and number of additional dwellings required.

What classes of buildings need a BASIX certificate?

Section J, Volume 1 and Part 3.12, Volume 2 of the National Construction Code (NCC) contain building regulations applicable to building energy efficiency. For NSW, parts of these building regulations pertaining to the energy efficiency of residential buildings are varied and BASIX applies.

For full explanatory notes on the application of building code energy efficiency requirements in NSW, the relevant NSW variations and appendices to the NCC should be consulted. In brief, residential buildings classified by the NCC as class 1, class 2 and parts of class 4 buildings are subject to BASIX, noting that certain technical provisions of the BCA are preserved and, in conjunction with the commitments on a BASIX Certificate, must be complied with.

Information on classification of buildings is available in the relevant part of Volume 1 of the NCC.

When is more than one BASIX certificate required?

The EP&A Regulation states that an application need only be accompanied by one BASIX certificate except "if the proposed development involves the alteration, enlargement or extension of a BASIX affected building that contains more than one dwelling, a separate BASIX certificate is required for each dwelling concerned."

This is because each component of any BASIX affected work being undertaken to an existing dwelling must pass a minimum requirement for water and energy efficiency and these requirements cannot be combine into a common 'score' covering the entire development.

Where the application is for new dwellings, the application need only be accompanied by one BASIX certificate, however, a number of certificates maybe required, or maybe desirable, in some circumstances.

Subdivision into single 'Torrens title' lots.

Where the development includes land subdivision into separate lots as well as construction of detached single dwellings (class 1 buildings) on those lots and does not involve any common property or shared services, the application may be accompanied by either one BASIX certificate covering all dwellings, or by individual BASIX certificates for each dwelling.

A single BASIX certificate covering all dwellings can be produced using the BASIX Multi-dwelling tool. For large subdivisions, this reduces the number of certificate pages by grouping the BASIX commitments for each dwelling in tables. However, this may create procedural complications for the applicant and approval authority later in the development cycle when revisions are made to parts of the application, particularly where land parcels are on-sold, or constructed by different sub-contracting builders.

In these cases, an individual BASIX certificate, or grouped certificates, may offer more long term flexibility for the applicant and approval authority, allowing revisions to the original Basix Certificate(s) to each individual dwelling.
The most suitable approach for a particular development is best determined in consultation with the consent authority (local council).

Development involving strata title.

Development for residential flat buildings, villa units, multi-dwelling houses, dual occupancy or mixed use development on land that includes common property, shared services or shared facilities should be accompanied by one certificate covering the entire development. This allows for proper apportionment of water and energy demands attributable to common property or shared central services and allows for clearer administration, with one certificate applying to the entire strata plan.

An exception to this is some larger developments and projects requiring staged or phased construction.

Staged development.

In some cases, the nature of the development requires division into separable parts for the purpose of part consent, staged construction or for easier management of each part or class of the development.

In such circumstances, you should first consult with the BASIX help desk to establish whether the project is suitable for division into separable parts and how common areas and shared services should be apportioned between those parts.

Large multi-building residential flats

Development involving a number of separate residential 'towers' or blocks with more than 600 units overall, may require more than one BASIX certificate to enable faster calculation of the BASIX score and allow easier management of future revision for each tower or block. In such circumstances, you should first consult with the BASIX help desk to establish whether the project is suitable for division into separable parts and how common areas and shared services should be apportioned between those parts.

To assist the help desk with providing a response, your enquiry should be accompanied by plans and description of the proposed development, and a proposal for how common property and shared services might be apportioned.

 Note: Certificates generated prior to 1 July 2017 are limited to 200 units.  To add more dwellings to these projects, please contact the BASIX help desk.

Revising a BASIX certificate

Development Application details

When revising a certificate that has been already lodged with the consent authority, the BASIX dialog box requests development application details, including type of application, lodgement date and application number. Adherence to correct entry of this data is important to ensure validity of revised certificates and provide a record of revision history. To revise a certificate generated in an earlier version of BASIX the certificate must have been lodged with the consent authority and the lodgement date must be entered into the BASIX dialog box.

Changes to local government boundaries

Changes to local government boundaries that came into force in 2016 may require reselection of the local government area when revising certificates. Read the help note Project Address for more information.

What is the application type?

The required information relates to the type of development consent being sought under Section 4.2(2) of the Act - either Development Application or Complying Development Certificate. 

What is the lodgement date?

For a Development Application (DA) under Part 4 of the Act (other than State Significant Development):

  • The date the application is made to the Consent authority (Council) in accordance with Section 4.12 of the Act; or
  • The date an amended certificate is lodged with the Consent Authority (Council) in accordance with Section 55A of the Regulation; or
  • The date that an application is made to the Consent Authority (Council) to modify a consent under Section 4.55 of the Act.

For a Complying Development Certificate (CDC) under Part 4 of the Act:

  • the date that an application is made to the Consent Principle Certifying Authority (Council or accredited certifier) in accordance with Section 4.28 of the Act; or
  • The date that an application is made to the Consent Principle Certifying Authority (Council or accredited certifier) to modify the CDC in accordance with Section 4.30 of the Act.

What is the application number?

This is the number provided by the consent authority or accredited certifier at time the application for consent is made. Correct input of this data is important to ensure validity of the revised certificate.

What if I make an error entering this data?

Users are advised to check the accuracy of the application details carefully. The data cannot be altered once 'continue' is selected. If an error is made, contact us. You will need to provide details of the certificate to be corrected, user name, logon and evidence of the correct application type, date and number (facsimile or scan of documentation from the consent authority).

Notes:

  1. The 'Act' means the Environmental Planning and Assessment Act 1979. 'Regulations' means the Environmental Planning and Assessment Regulation 2000.
  2. The Regulations specifies that for BASIX affected development, applications must be accompanied by a BASIX certificate issued no earlier than 3 months before the date on which the application is made. If this condition is not satisfied, the application may be considered as not properly made.
  3. This date only applies to certain certificates generated prior to 30 March 2009 where the certificate lodged with the construction certificate application is already a revision of the certificate lodged with the consent authority (DA or CDC application).

 

 

Certificate validity

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