Locally reviewed guidance. Reviewed by a London-based third-party homeowner advisor. Last reviewed May 24, 2026. Independent page, not affiliated with the City of London.
Quick Eligibility Screen
Property locationYour home should be within London, Ontario city limits.
Property typeThe program is aimed at eligible residential properties, commonly single-detached, semi-detached, and duplex homes.
TimingDo not start related construction before written City approval.
Project typeEligible work usually relates to backwater valves, sump systems, weeping tile disconnection, or battery backup paths.
What Usually Causes Problems
The common failure points are starting too early, using a quote that is not itemized, mixing eligible flood-prevention work with general renovation costs, or missing permit and inspection requirements.
How to Use This Page
Start with the eligibility form, then compare your likely project path against the grant calculator, the rules page, and the backwater valve cost guide.
Check your eligibility before work starts
Answer the short form and get the free guide plus next-step notes.
Check My Grant Eligibility