London Stormwater Discharge Permit Bylaw for Builders
Builders working in London, Ontario must manage construction-related stormwater to protect downstream infrastructure and the environment. This guide explains how the City of London addresses stormwater discharge from building sites, who enforces the rules, and the practical steps builders should follow to stay compliant with local bylaws and engineering requirements. It summarizes inspection and complaint pathways, common violations, and where to find official application or reporting pages. Use this as an operational checklist alongside official City of London guidance and development conditions.
Overview of Requirements
The City requires measures to control sediment, manage runoff rates and protect municipal drains during construction and site alteration. Site-specific conditions often arise from development approvals, engineering drawings and permits required by Development and Compliance Services and Environmental and Engineering Services. Refer to the City guidance for detailed expectations and stormwater practices City of London - Stormwater and drainage[1].
Permits, Plans and Controls
Builders typically must provide erosion and sediment control plans, temporary stabilization measures, and construction-phase stormwater management consistent with city standards and any development agreement. Conditions may be attached to site plan approvals or building permits.
- Provide an erosion and sediment control plan with permit applications.
- Install and maintain silt fences, sediment traps, and stabilized entrances during works.
- Keep records of inspections and maintenance for the duration of construction.
Penalties & Enforcement
Enforcement is handled by City of London enforcement teams within Development and Compliance Services and Environmental and Engineering Services. To report discharges or request an inspection use the city reporting page Report a concern[2]. Specific monetary fines or schedules tied to stormwater discharge are not provided on the cited City pages; where a fine schedule applies it will appear in the controlling bylaw or enforcement notice on the City site or in the development agreement.
Details required by the City for enforcement and appeals are not specified on the cited guidance pages; builders should obtain enforcement and appeal details from the controlling bylaw or the Development and Compliance Services office during pre-application review City of London - Stormwater and drainage[1].
Applications & Forms
The City guidance page lists stormwater topics but does not publish a single named "stormwater discharge permit" application form on that page; specific forms or checklists are typically provided with site plan, grading, or building permit applications or as part of a development submission package not specified on the cited page[1].
Common Violations and Typical Outcomes
- Uncontrolled sediment leaving the site — enforcement action and remediation orders likely; specific fine amounts not specified on the cited page.
- Failure to install/maintain erosion controls — corrective orders and stop-work directives possible; amounts not specified on the cited page.
- Unauthorized connection to storm sewers or drains — remediation and potential prosecution; details not specified on the cited page.
FAQ
- Do builders need a separate stormwater discharge permit?
- The City guidance page does not list a single, stand-alone stormwater discharge permit; requirements are usually managed through site plan, building permit conditions, or development agreements. See the city guidance for details City of London - Stormwater and drainage[1].
- Who inspects and enforces stormwater controls?
- Development and Compliance Services and Environmental and Engineering Services carry out inspections; to request an inspection report a concern via the City reporting page Report a concern[2].
- What if sediment has reached a municipal drain?
- Report the incident immediately and follow any City remediation orders; the cited pages do not specify exact fines or timelines.
How-To
- Review City of London stormwater guidance and any site-specific development conditions to confirm required controls and documents.
- Prepare erosion and sediment control and stormwater management plans for submission with your permit or development application.
- Consult Development and Compliance Services or Development Engineering during pre-application to confirm expectations and any required forms.
- Install controls before starting earthworks and document inspections and maintenance actions throughout construction.
- If ordered to remediate, follow the City direction promptly and retain records of corrective work and costs.
Key Takeaways
- Address stormwater controls in the earliest design and permitting stages to avoid delays.
- Maintain inspection records and be prepared to remediate if ordered by the City.
- Use the City reporting page to request inspections or report discharges.
Help and Support / Resources
- City of London - Stormwater and drainage
- City of London - Bylaws
- City of London - Building and development
- City of London - Report a concern
