This study investigated basement flood perceptions and mitigative behaviours of residents in the Sherwood Forest neighbourhood of London, Ontario. Though the Sherwood Forest area is relatively new and serviced by a separated sewer system, considerable sewer backup flood risk exists largely due to foundation drain connections to the sanitary sewer system. On May 28, 2009, a rainfall event consisting of 83 mm of precipitation over a five hour period flooded dozens of homes in the neighbourhood. This study investigated several aspects of homeowner knowledge and behaviour related to urban flood reduction and revealed many opportunities for both the City of London and insurers to increase homeowner knowledge and home-level action for urban flood reduction.