A standard home, condo, or tenant policy may cover certain types of water damage that happens suddenly and takes place entirely indoors, but it may not cover water that comes in at ground level because of an overflowing river, heavy rains, or snowmelt. Overland flood coverage is one possible add-on whose definition may overlap with or exclude groundwater, sewer backup, sump failure, or coastal flooding, depending on the insurance company.
How can you get the coverage you need in case of a flood? We reviewed the Government of Canada’s overland-flood guide. We also read Insurance Bureau of Canada’s flooding and claims guidance, IBC’s water-damage and flood-protection guide, and IBC’s home, condo, and tenant coverage guide.
This guide explains the terminology you’ll need to use when describing what happened when you call your insurance company to see if it’s covered, how losses are shared between auto, home, condo, and tenant insurance policies, what to look for when you’re comparing deductibles and exclusions, and what you should and shouldn’t do before and after a flood.
What Does Overland Water Coverage Protect Against?
Other water categories, including groundwater, coastal flooding or sewer backup, may require separate coverage.
Overland water coverage will typically protect your home and belongings if surface water at ground level makes its way into your home. This can be caused by an overflowing lake or river, melting snow or heavy rain.
Be sure to check the specifics of your policy, as different insurers can have different definitions, limits, exclusions and deductibles for overland water damage.
Match The Water Source To The Right Coverage
| Water event | Coverage to check | Important limit |
|---|---|---|
| Water from heavy rains or snowmelt that enters the property through a door, window well, the foundation, or garage. | Overland flood or overland water endorsement | Eligibility, limits, entry-point wording, exclusions and a separate deductible vary by policy. |
| Water from a body of water enters a house. The lake/river overflows onto usually-dry land. | Overland flood or overland water endorsement | Check the exact definition of body of water, flood, and surface water. |
| Water or sewage backs up through sewer, drain, septic or sump. | Sewer-backup or sump-failure coverage | If both causes contribute to the loss, read what happens. This may be available separately from overland coverage or it may be sold in a package. |
| Water that suddenly comes out of a pipe, hot-water tank or other water-using device located indoors. | Standard sudden and accidental water-damage coverage may respond | Some exclusions and/or conditions may apply for maintenance or freezing. The failed appliance or worn-out part may not be covered. |
| Water from groundwater, a rising water table or seepage under the surface entering through walls or floors. | Ask specifically about groundwater and seepage | Some insurers make this protection available by endorsement. However, IBC notes that it is not a standard part of all policies. |
| Storm surge, tidal water, or waves affect a coastal property | Ask whether the insurer offers coastal or storm-surge protection | The government’s guidance notes that some insurers may cover storm surge/tidal waves under their overland coverage. However, the IBC notes that storm surge or tidal waves are generally not covered by most insurance policies and endorsements. |
| A vehicle is damaged in a flooded garage | The vehicle’s auto policy, commonly optional comprehensive and/or collision coverage | If you had a car that you parked at your residence, your home, condo-corporation or tenant policy does not become vehicle insurance simply because the car was parked at home. |
How Much Of Your Premium Can Go Toward Enhanced Water Coverage?
MyChoice analyzed thousands of home insurance quotes collected since the beginning of 2026 to determine what share of the annual premium is attributable to enhanced water coverage. The share was calculated using a standard home profile. Depending on the city, enhanced water coverage represented between 3% and nearly 20% of the premium.
| City | Enhanced-water amount | Share of annual premium |
|---|---|---|
| Sudbury | $562 of $2,990 | 18.8% |
| North Bay | $529 of $2,671 | 19.8% |
| Toronto | $409 of $2,247 | 18.2% |
| Brampton | $209 of $2,046 | 10.2% |
| Calgary | $83 of $2,779 | 3.0% |
These are not prices for flood insurance. The cost of insurance depends on the characteristics of the property, its location, the insurer, and the protection included. When shopping for enhanced water coverage, don’t just consider the cost of insurance. It’s also important to check which sources of water are covered, the limits, deductibles and restrictions.
When Overland Water And Sewer Backup Happen Together
Both types of water can enter a building at the same time. For example, heavy rains may send surface water through openings into a basement while overloaded drains back water through plumbing.
Report every observed entry route, and do not label the whole loss as sewer backup or overland water before your insurer investigates. When you’re comparing policies, ask:
- If there was damage from both causes, would the insurer apply the same coverage limit, or is there a different limit for each? Would there be one deductible or two?
- Is backup caused by overland water covered?
- Does an exclusion change the result when an uncovered cause contributes?
Read More: See How Sewer-Backup Insurance Works
What Overland Water Coverage Does Not Automatically Cover
- In general, coverage is provided for sudden and accidental losses according to policy provisions. Gradual seepage, leakage, rot, deterioration and poor maintenance would not be covered. Some policies will cover the resulting water damage, for example, but exclude the source of the water, such as a leaky/worn-out roof or a busted appliance.
- Keep in mind that overland water coverage, including rebuilding costs, contents, additional living expense coverage, and clean-up costs, isn’t unlimited. There are sublimits, exclusions and a water-specific deductible that may apply.
Homeowner, Condo Owner, And Tenant Responsibilities
| You insure | Policy to review | What the other policy does not automatically replace |
|---|---|---|
| Detached or attached home | Homeowner policy and every water endorsement | Contractual insured limits and exclusions will still apply regardless of disaster assistance from the municipality. |
| Condo unit | Unit-owner policy, the condo corporation’s policy, declaration, and standard-unit definition | The corporation’s policy may include common property or standard-unit items, but not all improvements, contents, deductible assessments or living costs. |
| Rental home or apartment | Tenant policy and its water endorsements | Landlord’s building insurance policy does not cover your personal belongings. Additional living expense coverage requires an insured loss, subject to policy limits. |
Who Is Eligible For Overland Water Coverage?
Eligibility depends on the location of your property, its risk of flooding, and the insurer’s rules. Homes that are located close to a lake or river or other high-risk areas may be offered policies with a larger deductible, higher premiums or limited coverage, but proximity to water does not automatically make every property ineligible.
Questions To Ask Before You Buy
- What definitions does the policy use for overland water, flood, surface water, groundwater, sewer backup, sump failure, storm surge, tidal water and other causes of water damage? Some causes may be covered, others may be excluded, and coverage can vary according to the address of your home.
- If your home takes on surface water and suffers sewer backup at the same time during the same storm, what happens?
- How much coverage am I buying? Building, contents, cleanup, debris removal and additional living expenses can be covered by a single limit or by separate limits. Ask for clarity.
- Is there a special restriction for finished basements, contents in basements or water damage to vacant, rental, or seasonal homes?
- Would a backwater valve, sump-pump backup, grading work or another improvement change eligibility or price?
- What deductible applies to water damage? Could one event trigger more than one water deductible?
How To Prevent Water Damage In Your Home
Ensure That Your Sump Pump Is Working
Have a qualified contractor check the pump to ensure it’s appropriately sized for your building and installed correctly.
Check the pump and high-water alarm as frequently as the manufacturer recommends. Keep the pump’s discharge path clear of debris.
Consider an alternate power source for your pump, such as a battery or a generator.
Read More: See How Sump Pumps Relate to Home Insurance
Clean Out Your Gutters Regularly
Make sure eavestroughs are regularly cleaned out and downspouts are clear. Make sure that water is being directed away from your home, but not onto a neighbour’s property. Where conditions allow, the IBC recommends extending downspouts a minimum of six feet from the basement wall.
Install A Backwater Valve
A backwater valve can help to minimize your risk of sewer backup provided the valve is selected and installed correctly, and properly maintained.
Ask your municipality whether a permit, inspection or rebate applies.
Have the valve installed by a qualified plumber.
Protect Basement Windows And Grading
Clean out window wells, making sure there’s nothing that would interfere with window covers or window well flood protection. Make sure soil, patios, sidewalks, and driveways are graded and drain away from the foundation. Fill in dips and low spots now, and don’t wait until the next time the water collects against your basement window well wall.
Read More: Review Ways to Flood-Proof a Canadian Home
What To Do After Flood Water Enters
- Your first concern should be for life safety. Follow any instructions regarding evacuation. Avoid using electrical equipment until you’re certain it’s safe. Do not walk through moving water and avoid entering buildings where the structure may be undermined. Avoid entering floodwaters that may involve sewage, electrical current, fuel or structural damage.
- Report the event to your insurer or broker as soon as possible, explaining all sources and points of water entry into the building. Find out what remedial steps are allowed to minimize loss.
- Once it is safe to do so, photograph high-water marks, points of entry into the building, all affected areas and rooms, damaged property and any temporary repairs. Do not throw away damaged property unless directed to do so by the insurance company or local health authorities. Keep receipts of expenses relating to cleanup and temporary repairs. Take pictures of temporary repairs. Also, if displaced, keep receipts of temporary housing, meals above normal costs and other displacement expenses.
- Take all reasonable steps to prevent additional or consequential damage, including moving undamaged property from affected areas. Do not make permanent repairs until the insurer has seen the damage unless necessary for life safety. Ask the adjuster about deductibles, exclusions, limitations and proof-of-loss requirements.
Read More: Compare Insurance Treatment of Different Water Losses