Perth Mitigation Plan Requirements - City & State Law

Environmental Protection Western Australia 4 Minutes Read · published February 11, 2026 Flag of Western Australia

Introduction

Perth, Western Australia requires proponents of major projects to prepare mitigation and environmental management plans that meet both City and state assessment conditions. This guide explains where mitigation plans are required, which authorities review them, typical contents, and practical steps to prepare, submit and comply with plans for major developments. It summarises official sources and how to find forms, complaint pathways and appeal routes so project teams and residents understand legal obligations in Perth.

Start mitigation planning at the feasibility stage to avoid approval delays.

When a mitigation plan is required

Mitigation plans are commonly required where a development triggers: state environmental assessment, mandated conditions in ministerial statements, local development conditions, or works approvals and licences. Local planning conditions and state assessment outcomes set the minimum scope and monitoring requirements; proponents should check both City of Perth planning guidance and state EPA/DWER conditions when preparing documents. See local planning information and contacts for City submission requirements City of Perth planning and building[1], EPA guidance and condition frameworks Environmental Protection Authority WA[2], and state compliance/licensing pathways Department of Water and Environmental Regulation - Compliance and enforcement[3].

Core elements of an effective mitigation plan

  • Clear description of the project, scope and affected values.
  • Risk assessment and identification of receptors to be protected.
  • Detailed mitigation measures with responsibilities and timing.
  • Monitoring, reporting schedules and trigger levels for remedial action.
  • Recordkeeping, audit plans and adaptive management procedures.

Penalties & Enforcement

Enforcement for failure to prepare, implement or comply with mitigation plans can be carried out by local government officers, state regulators (EPA, DWER) or authorised inspectors under the relevant Acts and instruments. Specific monetary penalties and escalation ranges depend on which instrument is breached (local bylaw, planning condition, ministerial statement, licence or works approval). If a penalty amount or fee is not shown on the controlling page, the source is cited as not specifying an exact figure.

  • Monetary fines: not specified on the cited City or EPA pages for mitigation plans; amounts depend on the controlling instrument and are set in the relevant Act or instrument.[1]
  • Escalation: first, repeat and continuing offences are handled under infringement notices and enforcement provisions of the specific instrument; ranges are not specified on the cited guidance pages.[2]
  • Non-monetary sanctions: enforcement may include compliance notices, stop-works orders, remediation directions, suspension or cancellation of approvals, seizure of equipment, and prosecution in court as set out by the enforcing authority.[3]
  • Enforcer and complaint pathway: City of Perth planning and regulatory services handle local breaches; state-level environmental offences are enforced by DWER and EPA processes. Use the official City or DWER contact pages to report concerns.
If a condition refers to a ministerial statement, follow the statement schedules exactly when preparing mitigation plans.

Applications & Forms

Required forms depend on the approval path:

  • City development application forms and checklists for major works; specific forms are published on the City of Perth planning pages or available from planning officers.[1]
  • For state-assessed projects, EPA ministerial statements or assessment conditions specify required environmental management plans and submission procedures; the EPA site provides condition lists and links to statements.[2]
  • Works approvals or licences from DWER require application forms and compliance reporting schedules; check DWER licensing pages for forms and guidance.[3]

Common violations and typical remedies

  • Failure to lodge an approved mitigation plan — remedy: compliance notice and requirement to submit plan.
  • Non-implementation of controls during construction — remedy: stop-work orders and remedial directions.
  • Failure to monitor or report — remedy: notices requiring retrospective monitoring, audits and possible penalties.

Action steps

  • Identify whether your project is locally or state assessed at earliest design stage.
  • Consult City planning officers and review any ministerial statement conditions before finalising the mitigation plan.
  • Include monitoring, responsibilities, reporting timetable and adaptive management triggers in the plan.
  • If served with a notice, respond within the time limit stated in the notice and seek internal review or legal advice if contested.

FAQ

When must a mitigation plan be submitted?
A mitigation plan is required when it is specified as a condition of a development approval, ministerial statement, works approval or licence; check the approving instrument for exact timing and submission requirements.
Who reviews and approves mitigation plans for major projects in Perth?
City of Perth planning assessors review local planning conditions; state projects or those with environmental assessment are reviewed through EPA and DWER processes as specified in the approving instrument.
Can I appeal a requirement to prepare or implement a mitigation plan?
Appeals depend on the decision type; planning decisions may be subject to internal review or the State Administrative Tribunal, while enforcement notices under environmental legislation have prescribed review or court challenge paths—check the notice or instrument for time limits.

How-To

  1. Confirm the approval pathway for your project and obtain all conditions from the City and any state assessment instruments.
  2. Prepare a mitigation plan that names accountable persons, mitigation measures, monitoring metrics, reporting schedules and adaptive responses.
  3. Submit the plan with the development application or as required by the instrument and retain evidence of submission and approval.
  4. Implement controls, maintain records, and deliver monitoring reports according to the approved schedule; update the plan if monitoring triggers corrective action.
  5. If you receive an enforcement notice, comply or request a review within the timeframes set out in the notice.

Key Takeaways

  • Mitigation plans must align with both City of Perth conditions and any state assessment or licence requirements.
  • Include monitoring, reporting and clear responsibilities to avoid enforcement action.

Help and Support / Resources

  1. [1] City of Perth - Planning & Building
  2. [2] Environmental Protection Authority Western Australia
  3. [3] Department of Water and Environmental Regulation - Compliance and enforcement

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