How major projects are assessed

Major projects that are declared by the Minister for Planning and Local Government (the Minister) must go through a rigorous, state-run assessment process.

Major projects are set out by the new Planning, Development and Infrastructure Act 2016. These proposals are called impact assessed developments.

Assessment process steps


  1. The application is considered by the Minister as to whether the highest level of assessment is required given the environmental, social and economic impacts of the proposal.

    The Minister declares the application as a major development or project under the Planning, Development and Infrastructure Act 2016 (Section 111)

    A formal development application package is received from the applicant as per Practice Direction 4.

  2. Once a formal development application has been received for a major development or project, it is referred to the State Planning Commission (the Commission) to issue the applicant with assessment requirements.

    The Commission identifies social, environmental and economic issues relevant to the proposed development and the assessment requirements.

    During this process, the Commission may consult with:

    • commonwealth agencies (i.e. EPBC Act requirements)
    • relevant state government agencies
    • an independent specialist, selected from a list appointed by the Minister, who has particular expertise relating to the proposed development.

    The assessment requirements summarise all potential issues that need to be addressed by the development. They also highlight any further information that is required to enable a proper assessment of the development. The guidelines are publicly released for information on the PlanSA portal.

    As the application is preliminary and conceptual in nature at this stage it is not publicly released.

    Assessment Level

    Proposals that are declared by the Minister are considered to be the highest level of environmental, social and economic assessment, also referred to as:

    • Environmental Impact Statement (EIS, also known as impact assessed development).

    This is the level of assessment required for the most complex proposals, where there is a wide range of issues to be investigated in depth. If the project proponent is directed to prepare an EIS it must do so and then release it for public comment for at least 30 days unless a longer period is determined  by the Minister, and hold a public meeting in an area close to the site of the proposed development.

    This concludes the Commission's role in this part of the major development assessment process.

  3. The proponent prepares an EIS that responds to the assessment requirements.

    The length of time it takes for the proponent to prepare the EIS is not set and varies depending on complexity of the proposal.

    Once complete, the Minister releases the EIS for public and agency comment for at least 30 business days unless a longer period is determined by the Minister.

    The document provided by the applicant is subject to change as a result of feedback received during public consultation.

    Approval does not occur at this stage. This is a stage to enable the public to express their views on a proposal. All comments received during this period are considered in the assessment process.

  4. Following the public comment period, the proponent prepares a document that responds to all the submissions during the public consultation period.

    The document may include:

    • amendments to the EIS
    • changes to the original proposal in response to issues that have been raised
    • answers and/or clarification of issues raised.

    The completed document and associated public comments are made publicly available for information on the PlanSA portal.

  5. The Minister assesses the whole proposal and considers all the documentation produced – i.e. the assessment document, public and agency submissions and the response document – and prepares an Assessment Report.

    The Assessment Report is made publically available for information.

    The Assessment Report contains recommendations regarding the proposal, however, the proposal is still not approved at this stage.

  6. The Assessment Report along with the whole proposal (including the assessment document, public and agency submissions and response document) is provided to the relevant authority for consideration (the Governor of South Australia or the Minister).

    The proposal may be refused, approved or approved with conditions.

  7. From time-to-time proponents may seek variations to the development approval.

  8. The applicant may request extensions of time which are considered by the Minister or their delegate on their merits on a case by case basis.