London grant work starts with quotes and City review, not construction.
London's program is built around approved remedial measures, licensed plumbers or drainage contractors, written approval, permits, and inspection before payment.
City rebate summary
London lists grant funding for eligible flood protection measures such as backwater valves, sump pits and pumps, weeping tile disconnection, storm laterals, and related measures.
Before starting work
Contact licensed plumbers or drainage contractors to assess remedial measures and provide itemized estimates.
Main eligibility risk
Starting construction before the grant application is approved.
What Work May Be Covered
Backwater valve
90% of total cost up to $1,800.
Sewage ejector and holding tank
90% up to $6,000, instead of backwater valve.
Sump pit and pump with existing weeping tile disconnection
90% up to $4,000.
Additional weeping tile disconnection
90% up to $2,400.
Storm private drain connection
90% up to $7,000.
Storm building sewer
90% up to $3,000.
Sump pump battery backup with new sump pump
90% up to $1,400.
What To Do Before Starting Work
- 1Contact licensed plumbers or drainage contractors to assess remedial measures and provide itemized estimates.
- 2Contact London's Sewer Engineering Division to review the proposed measures.
- 3Submit the application with required quotes and wait for written approval.
- 4Hire the licensed contractor after approval and obtain required permits.
- 5Book Building Division inspection and submit paid invoices after work is complete.
Mistakes That Can Kill Eligibility
Starting construction before the grant application is approved.
Assuming waterproofing, crack repair, or new weeping tile installation is covered.
Missing the quote-count requirements in the by-law for higher project costs.
Installing a backwater valve without addressing weeping tile rules where applicable.
Using vague quotes that do not separate labour and materials by eligible work category.
Backwater Valve vs Sump Pump vs Foundation Drain Work
| Measure | Best for | Rebate watchout |
|---|---|---|
| Sanitary backwater valve | Reducing risk of sewage backup through the sanitary lateral. | Often requires a permit and inspection. Shared laterals, basement apartments, or the wrong lateral can affect eligibility. |
| Storm backwater valve | Reducing risk of storm sewer backup where the home has a storm lateral connection. | Do not assume a sanitary valve and storm valve qualify under the same program. |
| Sump pump and pit | Collecting foundation drain water and pumping it away from the home. | Discharge location, downspout disconnection, and new vs replacement equipment rules matter. |
| Foundation drain or weeping tile work | Redirecting water away from the sanitary/storm system or correcting drainage at the foundation. | Some programs cover disconnection/capping but not new waterproofing, crack repair, or interior finishes. |
Permit / Inspection / Licensed Contractor Notes
- London instructs approved homeowners to hire a licensed plumber or drainage contractor and obtain appropriate permits.
- The Building Division must inspect and sign off on installation as permit requirements apply.
- The program is administered at the discretion of the City Engineer.
Estimated Cost Range
Planning range before London grant
Backwater valve
$2,500-$5,500+ depending on access and restoration.
Sump pit and pump with weeping tile disconnection
$4,000-$10,000+ depending on drainage path and discharge.
Storm lateral / building sewer work
$7,000-$18,000+ depending on excavation and connection complexity.
London's grants depend on approved scope, eligible categories, and the City Engineer's review.
Contractor Checklist
- Ask which rebate program the proposed work relates to: municipal storm, regional sanitary, or no rebate.
- Confirm who applies for permits and who books the final inspection.
- Get an itemized quote that separates labour, materials, taxes, camera inspection, and each flood-prevention measure.
- Ask whether the contractor will provide sketches, licence numbers, invoices, and photos required by the city.
- Confirm the contractor will not start work until pre-approval is received where pre-approval is required.
- Ask how they determine sanitary vs storm lateral connections before recommending a valve.
- Keep every invoice, permit, inspection result, application email, and paid-in-full receipt.
Featured Contractors
Founding slot open
Licensed plumbing profile
- Best fit: backwater valve permits, camera inspection, and sanitary lateral work.
- Profile published only after the contractor confirms licence and service details.
Founding slot open
Flood-prevention assessment profile
- Best fit: sump pump planning, foundation drain work, and homeowner education.
- Manual review before any homeowner lead is routed.
Draft profile option
Waterproofing contractor profile
- Best fit: non-rebate waterproofing issues and broader basement water entry diagnostics.
- No rebate claim is made until the contractor confirms what support they provide.
Official City Links
FAQ
Does London cover waterproofing?
The City states the grant program does not provide funding for new weeping tiles, floor or wall crack repairs, or waterproofing services.
Can construction start before approval?
London's eligibility criteria include that construction related to the grant application has not commenced.
How long can City review take?
London's application steps say to allow up to four weeks for the City to review the application and approve the grant amount in writing.
Disclaimer
FloodValve Pros Ontario is not affiliated with any city or municipality. We do not guarantee rebate approval. Contractors may pay us for placement, lead routing, or introductions. Homeowners must confirm eligibility with the official city program before starting work.