What you need to know
The Rainwater Management Bulletin PDF file (903 KB) provides rezoning, development, and building permit applicants with information on the process and submission requirements related to rainwater management at development sites throughout Vancouver.
On-site rainwater management is needed to mitigate the impacts of increasing rainfall intensity due to climate change and increasing runoff from added imperviousness from denser development.
This will be achieved through a combination of increased pervious surfaces that enable rainwater to infiltrate, landscaped systems which allow rainwater to irrigate and evaporate, and the capture and use of rainwater.
The use of water sensitive site design and green rainwater infrastructure practices or source controls keeps harmful rainwater pollutants from entering our receiving waters, adds resilience to the City’s drainage system, and reduces combined sewer overflows.