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Lake Simcoe Region Conservation Authority

Lake Simcoe Region Conservation Authority > Planning & Permits > Stormwater Management > Retrofitting Existing Development

​​Retrofitting Existing Development

Low Impact Development (LID) practices can be applied to new development, redevelopment, or as retrofits to existing development. LID has been adapted to a range of land uses from high density ultra-urban settings to low density development.

Ideal sites for LID retrofit projects include:

  • Road Right-of-Ways
  • Industrial and Commercial Lands
  • Residential Lands
  • Public Lands (municipal facilities, parks, schools, places of worship)

Implementing sustainable LID practices on existing development helps to enhance how stormwater is managed in older areas built before modern stormwater controls. LID can support sustainability targets, address flood mitigation, improve communities and show commitment to the local environment.

Learn more about stormwater retrofits by viewing one of the following case studies:


The neighbourhoods around Newmarket’s Western Creek are aging with roads in need of repair, while extensive development is increasing risk of flooding downstream during intense storm events. Find out what LID practices were selected as part of this retrofit project.


Industry and Commercial

LSRCA added LID features such as bioswales, curbcuts, and permeable pavement to its aging parking lot. These features will help extend the life of the parking and walking surfaces and increase the number of parking spots. Learn more about LSRCA's new parking lot features and project outcomes.