London Wetland Protection Bylaws & Permit Process

Land Use and Zoning Ontario 3 Minutes Read · published February 12, 2026 Flag of Ontario

London, Ontario protects wetlands through a combination of municipal planning policies and conservation authority regulation. This guide explains the standards commonly applied to wetlands in London, who enforces those rules, the permit process, common violations and practical steps for property owners and developers to comply.

Standards and Where They Come From

Wetland protection in London is implemented through the City of London planning policy framework and screening of development adjacent to natural heritage features. Local mapping and natural heritage policies set setbacks and restrictions; technical review and permitting for works in or near wetlands are managed by the local conservation authority.[1]

When a Permit Is Needed

  • Filling, grading or changing drainage that affects a wetland.
  • Construction of structures, footings, or access roads in or adjacent to a wetland.
  • Any interference with wetland vegetation or water flow.
Always check both the City mapping and conservation authority regulation before starting work.

Who Enforces Wetland Protections

The Upper Thames River Conservation Authority (UTRCA) administers the provincial conservation authority regulations for development, interference with wetlands and alterations to shorelines and watercourses in the London watershed; the City of London enforces municipal planning controls and land-use approvals. For permit applications and regulation inquiries, contact the conservation authority for regulated-area permissions and the City for planning approvals.[2]

Penalties & Enforcement

Enforcement actions and penalties can be taken by municipal by-law officers and conservation authority staff when unauthorized works affect wetlands.

  • Monetary fines: not specified on the cited page.
  • Continuing offence penalties or daily fines: not specified on the cited page.
  • Court action or prosecution under applicable municipal bylaws or provincial conservation authority regulations.
  • Restoration orders requiring remediation of altered wetlands.
  • Seizure of equipment in extreme cases: not specified on the cited page.
If a conservation authority or the City issues an order, act quickly to understand appeal timelines.

Applications & Forms

Permits for work in regulated areas are issued by the conservation authority; planning approvals or minor variances are processed by the City. Specific application forms, fees and submission instructions are provided by each agency. If a particular form or fee is not listed on the referenced page, it is not specified on the cited page.

Common Violations

  • Unauthorized filling or grading within a wetland buffer.
  • Construction without conservation authority permit or City site plan approval.
  • Removal of vegetation that destabilizes wetland function.

Action Steps

  • Check City natural heritage mapping and planning policies early in project design.
  • Contact the conservation authority to request a regulated-area review before construction.
  • Obtain required permits and pay applicable fees prior to work.
  • Report suspected unauthorized wetland interference to By-law Enforcement or the conservation authority.

FAQ

Do I need a permit to fill a wetland on my property?
Possibly: filling or altering a wetland usually requires conservation authority permission and may need City planning approval depending on location and scale.
Who do I contact to determine if my property is in a regulated area?
Contact the Upper Thames River Conservation Authority for regulated-area determinations and the City of London planning staff for natural heritage mapping.
What happens if I work without a permit?
Enforcement may include fines, orders to restore the site, and prosecution; specific fine amounts are not specified on the cited pages.

How-To

  1. Confirm wetland boundaries using City maps and property-specific inquiry with planning staff.
  2. Contact the conservation authority for a regulation screening and guidance on whether a permit is required.
  3. Submit required permit and planning applications with site plans, drawings and any environmental reports.
  4. Wait for written approvals and comply with any permit conditions during construction.
  5. If issued an order, follow remediation directions or file an appeal within the stated time limit.

Key Takeaways

  • Start wetlands review early to avoid delays and enforcement risk.
  • Permits may be required from both the conservation authority and the City.

Help and Support / Resources


  1. [1] City of London - Environment & Natural Heritage
  2. [2] Upper Thames River Conservation Authority - Permits & Regulation