waterdamagequotesSt. Catharines · Ontario
Basement flooding in St. Catharines: what FLAP and Emergency FLAP pay, and the rules that disqualify people
St. Catharines had three 100-year storms in twelve days this summer. Between July 21 and August 2, 2026, more than 300 mm of rain fell, the City declared a State of Emergency, and a flood-protection programme that used to help about 30 households a year received more than 3,500 applications.
This page sets out what the City has published since: the Flood Alleviation Program and its $20 million emergency version, what each pays and for which devices, the conditions that disqualify people, where your sewer ends and the City’s begins, and what a claim against the City is up against.
The short version
- FLAP and Emergency FLAP both pay 90 per cent of eligible costs to a maximum of $5,000 — one pot, no per-item caps.
- Apply before any work starts. Work begun before approval is not eligible.
- Every weeping tile connection to the sanitary lateral must be disconnected and redirected to a sump pit to qualify for the emergency rebate.
- Emergency FLAP work must be finished by January 31, 2028. Your home does not need to have flooded to apply.
St. Catharines’ words for it
| What you would say | What St. Catharines calls it | What it changes |
|---|---|---|
| The flood rebate | Flood Alleviation Program (FLAP) | The standing programme: 90 per cent to $5,000. |
| The new emergency money | Emergency FLAP | The same share and cap, $20 million behind it, and a completion deadline. |
| Backwater valve | Mainline backwater valve (normally open) | Eligible. Exterior valves such as an adapt-a-valve, and normally closed valves, are not. |
| Disconnecting the weeping tile | Weeping tile disconnection or redirection | Eligible — and, for Emergency FLAP, required. |
| Backup sump pump | Secondary (backup) pump, battery or water-siphon | Eligible in both programmes. |
| The permit | Plumbing-Only permit | Required; its cost is eligible under Emergency FLAP. |
| The inspection | Initial contractor assessment | Done by your contractor under Emergency FLAP, not booked with the City. |
| The cheque | FLAP rebate | Mailed to the homeowner within four to six weeks — never to the contractor. |
What happened in July and August 2026
City of St. Catharines, July 2026 Flooding Response and Recovery · 2026
The City says the storms overwhelmed its infrastructure and affected thousands of residents in every part of the city; the Mayor declared a State of Emergency after more than 140 mm fell on July 27–28 and again on August 2. The City collected impacts through a Flood Impact Form to support potential provincial disaster assistance. It publishes no count of flooded homes.
The scale of the response is in one comparison the City itself makes. The standing FLAP supported about 30 applicants a year on a $150,000 budget. After the storms it had more than 3,500 applications — roughly a century of its previous demand, in weeks. The emergency programme exists because the ordinary one could not absorb that.
The Flood Alleviation Program
City of St. Catharines, Basement Flooding · 2026
The Flood Alleviation Program (FLAP). The City's 2026 brochure works an example: a $4,500 invoice returns $4,050; a $6,500 invoice returns the $5,000 maximum and leaves the owner $1,500. No per-item caps are published — the $5,000 is one pot across every eligible item. That puts St. Catharines level with London on share (90 per cent), and below only Niagara Falls (100 per cent) among the Ontario programmes on this site.
City of St. Catharines, FLAP homeowners’ brochure (2026) · 2026
The eligible work. The property must be a single-detached or semi-detached home built before 2012, inside City limits, with all work under a valid City permit. Before the floods, the City says, FLAP supported about 30 applicants a year on an annual budget of $150,000; it has since received more than 3,500 applications.
Set against the rest of Ontario, the $5,000 single pot sits between Hamilton’s $2,000 grant and Mississauga’s $7,500, and the 90 per cent share matches London’s. What is unusual is the absence of per-item caps: a St. Catharines homeowner can put most of the $5,000 towards whichever device the assessment says matters most, where Toronto and London cap each line separately.
City of St. Catharines, FLAP homeowners’ brochure (2026) · 2026
The same apply-first rule as London and Windsor. The Emergency FLAP homeowner information repeats it: you must apply to the program before starting any work. Rebate cheques are mailed within four to six weeks, to the homeowner, never to the contractor.
This is the rule that disqualifies the most people after a flood, when the instinct is to call a plumber the next morning. St. Catharines sits with London and Windsor, where you apply first; Toronto is the opposite, accepting applications up to two years after installation. The Ontario comparison sets the rules side by side.
Emergency FLAP: what changed
City of St. Catharines, Emergency Flood Alleviation Program · 2026
The Emergency FLAP page dates the Council meeting August 26, 2026. The City's own flood response news page dates it August 24, describing up to $5 million moved from the wastewater reserve fund and $15 million from the wastewater capital projects budget. Two official City pages, two dates; this site reports both.
City of St. Catharines, Emergency Flood Alleviation Program · 2026
Emergency FLAP adds items the regular programme does not list: the cost of the initial contractor assessment and the required Plumbing-Only permit. Valves must be mainline and normally open. Your property does not need to have flooded to apply, and anyone who applied to FLAP after July 1, 2026 does not need to apply again.
| FLAP | Emergency FLAP | |
|---|---|---|
| Share and cap | 90% of eligible costs, to $5,000 | 90% of the cost, to $5,000 |
| Assessment | On-site assessment by a City Program Coordinator | Your contractor completes the plumbing assessment; its cost is eligible |
| Permit cost | Work under a valid City permit | The Plumbing-Only permit cost is eligible |
| Weeping tile | Disconnection or redirection is eligible | All connections to the sanitary lateral must be redirected to a sump pit |
| Must the house have flooded? | Earlier guidance tied it to documented sanitary backups | No |
| Deadline | Not stated | All work complete by January 31, 2028 |
City of St. Catharines, Emergency FLAP Frequently Asked Questions (revised September 4, 2026) · 2026
A condition of the rebate, not an option. The FAQ also says homeowners no longer book an initial assessment with the City under Emergency FLAP — the contractor completes the plumbing assessment — and that the City does not endorse, recommend or require specific contractors.
City of St. Catharines, Emergency FLAP Homeowner Information (revised September 3, 2026) · 2026
Eighteen months, by the City's count. The same document excludes overland flooding, foundation or structural repairs, exterior backwater valves (for example an adapt-a-valve), normally closed valves, hydrostatic sump pumps and waterproofing, and says condominium and townhouse properties are not eligible.
What neither programme pays for
The exclusions say as much about the programme as the eligible list does. Emergency FLAP excludes overland flooding, foundation or structural repairs, exterior backwater valves such as an adapt-a-valve, normally closed valves, hydrostatic sump pumps and waterproofing. Condominium and townhouse properties are not eligible.
Two of those are worth reading twice. The ban on normally closed valves matches Toronto’s building permit rule, set out on our backwater valve page. And the exclusion of overland flooding is the City saying, in writing, what its devices cannot do: a backwater valve and a sump pit protect against the sewer, not against water coming across the ground — which is an insurance question, not a plumbing one.
Why these devices, in this city
City of St. Catharines, Basement Flooding Prevention Guide for Homeowners (PDF) · 2025
The City also describes combined sewers — carrying wastewater and stormwater together — as an older system that comes under considerable pressure in intense storms, and says FLAP will not protect against overland or infiltration flooding.
That is the same mechanism London, Niagara Falls and Saskatoon describe: groundwater around thousands of foundations arriving in the sanitary sewer at once, in the storm that is already filling it. Redirecting the weeping tile to a sump pit takes a house’s groundwater out of that pipe; a normally open backwater valve stops what is left in the pipe coming back. Our weeping tile page sets out what the work involves and what two Ontario contractors publish about its price.
Where your sewer ends and the City’s begins
City of St. Catharines, Sewers · 2026
Niagara Region runs the trunk sewers and treatment plants. For a backup, the City gives two routes: call a private plumber, whose cost is yours wherever the blockage is, or call the City to send a crew. If the blockage is in the main beyond your property line there is no cost to the owner — unless the house lacks a proper clean-out, in which case the owner is responsible for all costs regardless of location.
So St. Catharines splits at the property line, like Ottawa, Calgary, Edmonton and Saskatoon. The clean-out condition is the detail to act on: without a proper clean-out, the City says, the owner pays for a blockage wherever it is. During a backup, the City’s instruction is to stop flushing and stop running the washing machine and dishwasher, contact your insurer, and report it to the City.
Claims, insurance and the order to do things in
City of St. Catharines, Submitting a Claim · 2026
The City says a claim does not mean it will automatically accept responsibility, that a claimant must explain why the City is responsible, and that in most cases legal action must start within two years. Its 10-day written notice rule is stated for roadway and sidewalk injuries only; this site found no flooding-specific notice period.
Municipal Act, 2001, S.O. 2001, c. 25, s. 449(1) · 2026
The section is headed “Liability in nuisance re: water and sewage” and extends the same bar to council members and to a municipality’s officers, employees and agents. Subsection (3) preserves liability created by a statute, and subsection (4) says the bar does not apply if the cause of action arose before December 19, 1996. Read from the consolidation in force from June 2, 2026. What it removes is nuisance — the claim that does not need fault. What remains is negligence, which does.
St. Catharines is an Ontario municipality, so the Municipal Act’s bar on nuisance claims for escaping sewage applies here as everywhere else in the province: a claim has to show negligence. After three 100-year storms in twelve days, the City’s own description of its infrastructure being overwhelmed is a description of the ordinary cause of a backup, not of fault. The seven-city comparison is on is the city responsible for a sewer backup?
Insurance Bureau of Canada, Water Damage and Flood Protection · 2026
IBC's wording is unambiguous: “Damage caused by the backing up of sewers and drains is typically not covered by a standard policy.” It adds that “optional sewer backup is offered by most insurers” — so the cover exists, it is just not switched on by default.
The order that keeps every option open after a flood here: photograph and report first, call your insurer, apply to Emergency FLAP before anyone starts work, and only then book the plumber.
Why this site has nothing to gain from your answer. We are paid a fixed amount for each enquiry, agreed before it is sent. It does not move with the size of the job, with whether you book anything, or with which company you pick. So there is no version of this page where steering you is worth anything to us — which is also why you will not find a company named, rated or recommended anywhere on this site.
Questions people actually ask
How much does the St. Catharines Flood Alleviation Program pay?
Up to 90 per cent of eligible costs, to a maximum of $5,000, with no per-item caps. The City's example: a $4,500 invoice returns $4,050; a $6,500 invoice returns the $5,000 maximum.
What is Emergency FLAP?
A programme for homeowners affected by the July and August 2026 storms, with $20 million approved by City Council. It pays 90 per cent of the cost to a maximum of $5,000, adds the contractor assessment and Plumbing-Only permit as eligible costs, and requires all work to be completed by January 31, 2028.
Does my house have to have flooded to apply?
No. The City says your property does not need to have experienced flooding to apply to Emergency FLAP. It must be a single-detached or semi-detached home built before 2012 and connected to the City's sanitary sewer.
Can I start the work before I apply?
No. The City says no construction or installation work may begin before the application is approved, and that you must apply before starting any work.
What does Emergency FLAP not cover?
Overland flooding, foundation or structural repairs, exterior backwater valves such as an adapt-a-valve, normally closed valves, hydrostatic sump pumps and waterproofing. Condominium and townhouse properties are not eligible.
Who is responsible for the sewer pipe in St. Catharines?
The property owner is responsible for sewer service from the property line to the building, and the City for sewer services and mains on public property. If the house lacks a proper clean-out, the owner is responsible for all costs of a blockage regardless of its location.
Where to read next
- Weeping tile, and disconnecting it
- Backwater valves: types, cost and maintenance
- Ontario’s programmes compared
- Is the city responsible for a sewer backup?
- What overland cover responds to
Sources cited on this page
- City of St. Catharines, July 2026 Flooding Response and Recovery
- City of St. Catharines, Basement Flooding
- City of St. Catharines, FLAP homeowners’ brochure (2026)
- City of St. Catharines, Emergency Flood Alleviation Program
- City of St. Catharines, Emergency FLAP Frequently Asked Questions (revised September 4, 2026)
- City of St. Catharines, Emergency FLAP Homeowner Information (revised September 3, 2026)
- City of St. Catharines, Basement Flooding Prevention Guide for Homeowners (PDF)
- City of St. Catharines, Sewers
- City of St. Catharines, Submitting a Claim
- Municipal Act, 2001, S.O. 2001, c. 25, s. 449(1)
- Insurance Bureau of Canada, Water Damage and Flood Protection
Every figure above was read from the source it is attributed to on September 20, 2026. How we check this.
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