Managing stormwater in Calgary requires infrastructure both on private sites and on public land.  When redevelopment happens where there isn’t an existing stormwater main, an extension to the nearest stormwater main must be built. While these costs are the developer’s responsibility, they can be costly for a builder, which means they can impact the price of the homes or reduce the viability of the project.

A pilot is in place to explore better ways to collect these funds and build the required stormwater main extensions, making it easier for more homes to be built. The current phase of the pilot covers required storm extensions for residential applications submitted since October 2023, and provides up to $2,100 for each meter of pipe and up to $1 million per eligible project. Projects which don’t need extra pipes but benefit nearby properties will be considered.

For more information or to submit a pre-approval or reimbursement application, please email Stormwater@Calgary.ca with the subject line “extension pilot:”