Environmental Impact Statement (EIS)

An Environmental Impact Statement (EIS) is the full impact study required for designated development and major projects under Australian planning legislation. It is prepared by qualified consultants and addresses the environmental, social, and economic impacts of the proposal in substantive depth. The EIS is mandatory for NSW designated development under EP&A Act 1979 s.4.18 and for certain Commonwealth projects under the EPBC Act 1999 (Cth). It is significantly larger in scope than a Statement of Environmental Effects (SoEE), which accompanies routine DAs. Verified per EP&A Act 1979 (NSW) and EPBC Act 1999 (Cth) (2026-05-23).

What’s in an EIS

The standard EIS for NSW designated development typically includes:

Section	Content
Executive summary	Project overview and key impacts in plain language
Project description	Detailed description of the proposal, alternatives considered
Statutory framework	Applicable Acts, regulations, planning instruments
Site description	Existing environment, ecology, geology, hydrology
Community consultation	Pre-EIS engagement results, stakeholder identification
Impact assessment by topic	Each environmental factor (water, air, soil, fauna, flora, noise, traffic, social, economic, heritage)
Cumulative impact	Combined impact with existing/proposed developments
Mitigation measures	Proposed measures to avoid/reduce/manage each impact
Monitoring and management	Ongoing monitoring plans, contingencies
Conclusion and recommendation	Whether the project should proceed
Technical appendices	Specialist reports, modelling, surveys

A typical NSW residential EIS runs 300-1,500 pages including appendices.

When an EIS is required

Trigger	Authority
NSW designated development under EP&A Act s.4.18 + EP&A Reg 2021 Sch 3	NSW Government
State-significant development (SSD) under EP&A Act s.5.1	NSW Government
Commonwealth listed project (matters of national environmental significance)	EPBC Act 1999 (Cth), Department of Climate Change, Energy, Environment and Water
State-significant projects in other states (with EIS-equivalent)	State environment authority

Most standard residential does not require an EIS. The trigger is:

Mines, quarries (designated NSW).
Major industrial uses.
Energy infrastructure (power stations, large solar/wind).
Waste management infrastructure.
Major roads and transport infrastructure.
Aviation facilities.
Some larger subdivisions (over council thresholds).

For typical residential builders, EIS is not part of the project unless working on a large subdivision (typically 25+ lots) or a project listed in Schedule 3.

EIS vs SoEE

Document	When required	Length	Cost (NSW residential)
SoEE (Statement of Environmental Effects)	Standard residential DA	10-50 pages	$1,000-$5,000
EIS (Environmental Impact Statement)	Designated development, SSD	300-1,500 pages	$50,000-$500,000+

The SoEE is a simplified impact assessment. The EIS is a comprehensive impact study with multiple specialist reports and modelling.

EIS preparation process

Scoping: identify the specific issues the EIS must address (council scoping or Director-General’s requirements).
Consultant team: appoint a lead environmental consultant; specialists for ecology, traffic, acoustic, heritage, water, etc.
Baseline studies: existing environment assessment over months.
Impact modelling: noise, traffic, water quality, air quality, etc.
Mitigation design: design measures to address each impact.
Community consultation: stakeholder meetings, public information sessions.
Draft EIS: prepared by the consultant team.
Public exhibition: typically 28 days minimum; longer for complex projects.
Submissions analysis: review and respond to public submissions.
Final EIS: incorporating submission responses.
Decision: by the consent authority (council or Minister for SSD).

A complex EIS process takes 12-36 months from start to decision.

Cost structure (typical NSW residential subdivision)

Component	Indicative cost (ex-GST)
EIS coordination	$50,000-$150,000
Ecology study	$20,000-$80,000
Traffic assessment	$15,000-$60,000
Acoustic assessment	$10,000-$40,000
Water quality / stormwater	$20,000-$80,000
Heritage and Aboriginal cultural heritage	$15,000-$60,000
Soil and contamination	$10,000-$40,000
Other specialists (visual, social, economic)	$30,000-$100,000
Total EIS package	$170,000-$610,000+

For a Commonwealth-listed project (EPBC Act), additional Federal review fees apply.

EPBC Act 1999 (Cth) parallel pathway

The Commonwealth EPBC Act 1999 requires environmental assessment for projects affecting matters of national environmental significance (MNES), including:

World Heritage properties.
Listed threatened species and ecological communities.
Listed migratory species.
Commonwealth marine areas.
Great Barrier Reef Marine Park.
Nuclear actions.
A water resource (in mining or large coal/gas).

A residential project rarely triggers MNES unless it’s on or adjoining a sensitive area.

For NSW projects, the EIS lodged at state level may also satisfy Federal requirements through a bilateral assessment under the EPBC Act.

Decision-maker

Decision authority	Triggered for
Council	Routine designated development
Joint Regional Planning Panel (JRPP)	Regional NSW designated development
Minister for Planning	State-significant development (SSD)
Independent Planning Commission (IPC)	Some SSDs
Land and Environment Court (LEC)	On appeal from any council/panel decision
Commonwealth Environment Minister	EPBC Act-listed projects

Public participation rights

EIS-driven projects have extended public participation:

Public exhibition: 28+ days minimum.
Public information sessions: typically 2-4 sessions for complex projects.
Submitter rights: anyone can lodge; standing recognised broadly.
Third-party appeal rights: yes for NSW designated development.
Court appeal: extended court process with extensive expert evidence.

Common defects in EIS process

Defect	Consequence
Inadequate scoping	EIS misses key issues; council requires revision
Insufficient ecology study	Surveys missing seasonal data; revise required
Mitigation measures vague	Council can’t condition consent meaningfully
Cumulative impact not assessed	Refusal grounds
Community consultation perfunctory	Submission criticism; appeal grounds
Specialist reports inconsistent	Internal contradictions weaken the EIS
Modelling assumptions challenged	Expert evidence required in appeal

Builder takeaway

For standard residential, EIS is not relevant. Use the SoEE pathway.
For larger subdivisions (>25 lots), heritage-significant sites, environmentally-sensitive sites, or projects listed in Schedule 3, plan for EIS at the project economics stage.
Budget $170k-$610k+ for the EIS package and 12-36 months in the timeline.
Engage specialist consultants early; the EIS is built from their reports.
For Commonwealth-listed projects, the EPBC Act parallel pathway adds Federal review.

Cross-state equivalents

State	Equivalent comprehensive impact study
NSW	Environmental Impact Statement (EIS) (this)
VIC	Environmental Effects Statement (EES) under Environment Effects Act 1978
QLD	Environmental Impact Statement under Environmental Protection Act 1994
WA	EPA-level assessment under EP Act 1986
SA	Restricted Development assessment under PDI Act 2016
TAS	Environmental Impact Statement (Major Project Notices)
NT	EIS under Environment Protection Act
ACT	EIS under Planning Act 2023

Also known as: EIS; environmental impact study; impact assessment statement; impact study.

Category: Approvals & DA.