Social impacts are the effects people experience when a new project brings change to their lives, communities, or environment.
Guideline to assess the social impacts of major projects
The Social Impact Assessment Guideline helps deliver a clear and consistent approach to assessing the social impacts of state significant projects.
The guideline provides a framework for suitably qualified experts to identify, predict, and evaluate social impacts of major projects and develop appropriate responses. This provides clarity and certainty for both project proponents and the community.
Social Impact Assessment Guideline
Read the Social Impact Assessment Guideline.
All State significant projects need to prepare a Social Impact Assessment (SIA) in accordance with the Secretary's Environmental Assessment Requirements (SEARs). The guideline is supported by the Technical Supplement that provides a ‘how to’ guide for meeting the requirements of the Social Impact Assessment Guideline. The optional 2025 Scoping Worksheet is a useful tool to assist at the scoping stage.
Refined Guideline
The Department made minor changes to the Social Impact Assessment Guideline in March 2026. These changes describe who we think are suitably qualified to undertake SIAs for state significant projects, and the public declarations we would like them to make. See Appendix B of the guideline for details.
These changes build on the 2025 refinements that focuses on clearer messaging and more practical and proportional guidance. Projects with SEARs before March 2026 can continue to refer to the previous version of the guideline.
We will continue to work with professional bodies to improve the Department’s ability to rely on experts preparing SIA reports for state significant projects.
The guideline and supporting materials have been operational for over 3 years. Feedback from key stakeholders and practical implementation have highlighted areas that were unclear. The refinements aim to improve clarity, structure, and proportionality without changing the requirements or policy. These updates also align with the recent changes to social impact assessment requirements for state significant housing projects.
Watch the recordings to learn more about the key refinements and enhancements.
Webinars
On Thursday 21 May 2026, we hosted a webinar, in partnership with the Environment Institute of Australia and New Zealand, hosted to outline the changes to Appendix B of the SIA guideline. It also sets out how these relate to expectations for experts working on state significant projects.
On Thursday 7 August 2025, we hosted a webinar to walk through the changes to the Social Impact Assessment Guideline.
Key refinements
To streamline the delivery of major housing developments, the Secretary's Environmental Assessment Requirements (SEARs) for state significant housing projects require social impacts to be considered in the Environmental Impact Statement (EIS). A Social Impact Assessment in accordance with the Social Impact Assessment Guideline is only required where those impacts are assessed as significant.
This case study demonstrates how social impacts may be considered within an Environmental Impact Statement: Case study – consideration of social impacts for housing projects.
The refined guideline reflects that all state significant projects must undertake a social impact assessment in accordance with their Secretary's Environmental Assessment Requirements (SEARs). This refinement aligns with the 2024 changes to State significant housing project SEARs, which provide an alternate approach to social impact assessment.
The refined guideline clarifies the purpose of the post-approval stage of social impact assessment to be about the implementation of social impact mitigation and management measures. As part of this refinement, it is expected that management of social impacts should be addressed in the social impact assessment.
The refined guideline clarifies that mitigation measures should be tangible, relevant, deliverable, and enduring. Key social mitigations should be included in the Environmental Impact Statement mitigations table.
The refined guideline provides clearer advice for when a Social Impact Management Plan is needed and clarified what the social impact assessment should include.
The guideline's refinements emphasise the importance and purpose of using primary data, including relevant engagement, to support well-informed and reliable assessments. They clarify the distinction between the general purpose of engagement for Environmental Impact Statement (EIS) and social impact assessment, helping to define the role of each in project development. Guidance on engaging interested and impacted people has also been refined, with a stronger focus on those who are directly impacted.
The technical supplement has been updated to improve both proportionality and clarity.
For scoping the level of assessment, the definition of a 'standard assessment' has been refined to apply to projects with 'moderate impacts' rather than 'unlikely significance'. A new 'negligible' rating has been introduced into the significance matrix for unlikely or minimal impacts, and 2 medium ratings have been reclassified to low significance.
To achieve better proportionality, the Scoping Worksheet has also been updated to:
- consider whether planned environmental management measures would modify social impacts
- limit the highest level of assessment for positive impacts to 'standard'
- include new inputs, such as identifying who is impacted.
Additionally, layout and functionality improvements have also been made to deliver a more practical tool.
Culture is one of the categories of social impact in the Social Impact Assessment Guideline. Engaging with Aboriginal communities is a specialised area, which requires a culturally sensitive approach. This practice note provides guidance on understanding the value of this engagement and the principles and protocols to consider when planning for and engaging with Aboriginal communities for social impact assessment.
Social impact assessments aim to improve social outcomes from projects. This Project Refinements practice note highlights how this should be pursued through early and iterative changes or refinements to projects. It provides examples of how to achieve better social outcomes and showcases how they should be documented in a clear and transparent way.
The Social Impact Management toolbox complements the Social Impact Assessment Guideline by providing guidance on managing social impacts and implementing Social Impact Management Plans (SIMPs).
It is designed for proponents and their contractors. It includes a range of approaches you can choose for the adaptive and proactive management of social impacts. These can help you move from managing complaints and issues to engaging positively with affected communities.
The Social Impact Assessment Guideline requires a project social locality to be defined. The extent of the social locality should be established on a case-by-case basis and define the areas where people will experience impacts.
The term 'social locality' is similar to, but more specific than, the 'area of social influence', commonly used in social impact assessment practice.
The definition of 'social locality' has been clarified as the area where people experience impacts. We have described the existing social locality examples to provide clearer guidance on how to develop a social locality and consider gradients of social impacts.
Identifying the social locality begins with understanding the nature of the project and the characteristics of affected communities. It also involves identifying where positive and negative impacts may be experienced by different people, including how those impacts vary across the geographical area.
These animations illustrate some of the considerations on defining a social locality of differing complexities.
Resources
- Undertaking Engagement Guidelines
- Cumulative Impact Assessment Guidelines
- Crime Prevention and the Assessment of Development Applications Guideline
- Voluntary Land Acquisition and Mitigation Policy (PDF, 3.5 MB)
- Renewable energy planning framework (including Private Agreement Guideline)
- 2025 Social Impact Assessment Guideline
Stay informed about social impact assessment
More information
For more information and any queries, email the Major Projects Advisory team at [email protected]