Perth Stormwater Bylaws and Connection Rules

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

Perth, Western Australia manages stormwater connections and runoff through local council controls and state technical standards; property owners must avoid unauthorised discharges to public drains and follow design and approval processes described by the City of Perth and state guidance.[1] This guide summarises responsibilities, typical compliance steps, enforcement paths and where to find official forms and technical requirements, including reference to the Stormwater Management Manual for Western Australia for design standards and water quality treatment expectations.[2]

Overview of Controls and Connections

Local controls typically cover where private stormwater may connect to the public system, required drainage plans for development, and prevention of pollutants reaching drains. The state manual provides technical standards for treatment, detention and design for new works. See the City of Perth for local connection rules and the DWER manual for engineering and water-quality benchmarks.

Always check the City of Perth requirements before altering drainage on your property.

Penalties & Enforcement

Enforcement is carried out by the City of Perth and relevant local government officers; state agencies may enforce pollution controls for water quality under state environmental law. Specific monetary fines and scales are not specified on the cited City or state guidance pages and therefore are listed below as "not specified on the cited page" where the official page does not publish amounts.

  • Fines: not specified on the cited page for general stormwater connection breaches; consult the City of Perth for published penalty schedules and infringement notices.
  • Escalation: whether first, repeat or continuing offences attract higher penalties is not specified on the cited page.
  • Non-monetary sanctions: remedial orders, requirement to disconnect or modify works, abatement notices, and referral to court processes are used by the council and state regulators where appropriate.
  • Enforcer & complaints: primary contact is the City of Perth By-law/Infrastructure/Drainage team; report drainage or illegal discharges via the City of Perth report/requests page.[1]
  • Appeal/review: internal review or formal appeal procedures are handled under local government decision frameworks and, where applicable, through external review avenues; exact time limits and appeal routes are not specified on the cited City page.
If you observe pollution or unauthorised discharge, report it promptly to the council or state environment hotline.

Applications & Forms

The City of Perth publishes guidance on stormwater connections and how to request or report drainage works, but a single standard connection form is not specified on the cited City pages; where development approval is required, drainage plans are lodged as part of development applications and technical exhibits. For design and treatment specifications refer to the Stormwater Management Manual for Western Australia for required documentation.[2]

  • Application forms: specific stormwater connection forms are not published on the cited City pages; use the City of Perth request or development-application channels to start the process.
  • Fees: fees for approvals or inspections are not specified on the cited City pages and must be confirmed with the City when applying.
  • Deadlines: statutory timeframes for processing are not specified on the cited pages; allow time for assessments and possible requests for additional information.

Common Violations

  • Unauthorised connection of roof or yard drains to stormwater mains—penalty: not specified on the cited page.
  • Discharge of pollutants (silt, oil, washwater) to public drains—penalty: not specified on the cited page.
  • Failure to maintain private drainage leading to public nuisance—penalty: not specified on the cited page.
Proper design and pre-treatment reduce long-term compliance risk and maintenance costs.

Action Steps

  • Confirm whether your work needs a development application or a drainage connection approval with the City of Perth.
  • Engage a qualified engineer to prepare drainage plans that follow the Stormwater Management Manual for Western Australia.
  • Submit plans and any application via the City of Perth development or service request process and include pollution-prevention measures.
  • Pay any applicable fees as advised by the City and comply with any inspection or remedial directions.

FAQ

Can I connect my private downpipe to the public stormwater drain?
Often permitted with approval from the City of Perth and subject to technical requirements; check the City of Perth connection guidance and submit plans if required.[1]
How do I report illegal discharge or blocked public drains?
Report through the City of Perth report/request channels for drainage issues; for water-quality pollution consult the state environment contacts and submit evidence to the council.[1]
Where are the design and water-quality standards published?
Design and treatment standards are published in the Stormwater Management Manual for Western Australia maintained by the Department of Water and Environmental Regulation.[2]

How-To

  1. Identify whether your proposal is routine maintenance, minor works or development requiring approval; contact the City of Perth for classification.
  2. Engage a qualified civil engineer to prepare drainage plans and treatment details that reference the Stormwater Management Manual for Western Australia.
  3. Submit the plans and any connection request via the City of Perth development application or service request process and provide required documentation.
  4. Arrange inspections if required, complete any remedial actions requested by the City, and keep records of approvals and works.

Key Takeaways

  • Always check City of Perth approval requirements before altering stormwater connections.
  • Follow the Stormwater Management Manual for Western Australia for design and treatment standards.

Help and Support / Resources


  1. [1] City of Perth - Streets and Drainage
  2. [2] Department of Water and Environmental Regulation - Stormwater Management Manual