Does Commercial Property Insurance Cover Overland Floods in Canada?

Flooding is Canada’s most common natural hazard, and it poses a risk to business owners everywhere. 

Over the past five years, increasingly frequent and severe flooding has been a primary driver of insured losses, according to Statistics Canada.

Meanwhile, data from the Insurance Bureau of Canada (IBC) showed severe weather events caused more than $2.4 billion in insured damages across the country in 2025 – the tenth costliest year on record for weather-related insured losses. That’s substantial, but it’s considerably lower than the record-breaking $9.4 billion in insured damages recorded in 2024. 

Beyond the property damage itself, floods hurt business owners by forcing temporary closures for repairs, cutting into revenue and profitability. 

Commercial property insurance policies do not automatically include protection against overland flooding. Business owners may need to purchase an additional overland water or flood endorsement.

This guide provides an overview of what commercial property insurance covers, the different types of water damage, and how businesses can minimize their flood risks. 

What Types of Floods Are There?

Floods can happen in different ways, and each type can impact a business property differently. Because insurance providers define and cover each category differently, a single, all-encompassing flood insurance policy does not exist. Speak to an insurance broker about enhancing your property coverage against flood damage. 

That might involve coverage for:

• Overland or pluvial floods: Surface water accumulation from prolonged, heavy rain or spring snowmelt that the ground – or local sewer and stormwater systems – cannot absorb, causing water to pool on streets and inundate basements. 
• Fluvial or river floods: This occurs when rivers, streams, or lakes overflow their banks after heavy rainfall or snowmelt, sending water into surrounding areas. 
• Coastal floods: Impacting oceanic regions like Atlantic Canada, these are driven by high tides, hurricanes, and severe storm surges.
• Flash floods: These are sudden, high-intensity events caused by rapid thunderstorms or downpours, frequently seen in the mountainous landscapes of Alberta and British Columbia.
• Groundwater floods: These arise when a high water table or saturated earth forces moisture upward, compromising building foundations and sub-levels. 
• Sanitary or sewer floods: This occurs when sewage backs up into a building due to heavy rainfall, groundwater infiltration into sewer systems, pipe blockages, or inadequate sewer capacity. 

How Can Business Owners Protect Their Properties From Floods?

Business owners can take flood prevention and management steps to try to minimize flood damage to their properties, such as:. 

• Installing a sump pump with battery backup
• Sealing cracks in a building’s foundation
• Elevating inventory and electronics off of floors
• Installing a sewer mitigation or backwater valve
• Creating an emergency response plan

Our free, downloadable insurance guide, “How to Protect Your Business Property in the Era of Climate Change”, offers guidance on how to safeguard your business from severe weather and natural disasters.

What Does Commercial Property Insurance Cover?

Commercial property insurance is vital coverage for any business property owner. It covers a wide range of damages and losses outside a business owner’s control.

However, not all business property policies include coverage for overland floods, which is why it’s worth ensuring your policy features all-risk or all-perils coverage.

In general, commercial property insurance covers a wide range of business assets, including:

• Commercial buildings and attached structures
• Furniture, fixtures, and fittings
• Office equipment and electronics
• Inventory and merchandise
• Storefront signage and fencing
• Equipment, including boilers, furnaces, and business contents
• Improvements made to a leased commercial property, such as carpeting, lighting, and paint

A commercial property insurance policy with an overland flood endorsement can help protect business owners from losses related to water damage, including:

• Overland floods caused by extreme weather
• Rapid accumulation of runoff surface water
• Municipal sewer backups that flood the interior of a property (if sewer backup coverage is also included – see the FAQ below) 
• Internal burst water pipes that inflict water damage
• Leaking appliances that damage property

Most commercial property insurance policies include business interruption insurance, or it can be added to your property policy. It covers your lost income, operational expenses, utility bills, and employee payroll if you’re forced to close temporarily for repairs following an insurable loss, such as water or fire damage. 

How Much Does Commercial Flood Insurance Cost in Canada?

Commercial flood insurance premiums vary because they are calculated based on several factors, such as:

• The location of the business and its regional flood risk
• Proximity to nearby water bodies, including lakes, rivers, or floodplains
• The building’s structural condition, age, and construction type
• Exposure of basements or below-grade areas
• The total value of the property and its inventory
• The specific type of business operating at the location
• Existing flood-prevention measures
• Chosen deductibles and coverage limits
• A history of previous water-damage or flood claims

Generally, insurance providers increase premiums if a business property is deemed to have a higher probability of sustaining a covered loss.

The best way to know what overland flood insurance may cost your business is to get a free quote online in less than five minutes.

Flood Alert Resources for Canadian Small Business Owners

Each province provides flood and other natural disaster information updates through their respective websites that business owners can use to monitor the conditions in their regions:

• Alberta
• British Columbia
• Manitoba
• New Brunswick
• Newfoundland and Labrador
• Nova Scotia
• Ontario
• Prince Edward Island
• Saskatchewan

Other resources for business owners on flood preparedness:

• The Government of Canada
• Natural Resources Canada
• Environment and Climate Change Canada
• FloodSmart Canada
• The Insurance Bureau of Canada

Frequently Asked Questions About Business Flood Insurance in Canada

Does commercial property insurance automatically cover flooding? 

Not necessarily. Standard commercial property insurance does not always include damage caused by overland flooding. Flood protection may need to be purchased as an endorsement or optional extension. 

What is an overland flood?

Overland flooding occurs when freshwater flows over normally dry ground and penetrates a building. Distinct from sewer backups or plumbing pipe bursts, overland flooding is typically caused by:

• Overflowing streams, rivers, or lakes
• Persistent or torrential rain
• Rapidly melting snow
• Surface water pooling around a building
• Overwhelmed local drainage systems

Is overland flood coverage the same as sewer backup coverage?

No. While overland flood insurance typically covers water moving across the ground surface into a building, sewer backup insurance is designed for instances where water or wastewater backs up through toilets, drains, sump systems, or sewer lines. Many businesses benefit from carrying both. 

What should a business owner do after flood damage occurs?

Prioritize the safety of your employees and customers first, and call emergency services if needed. When conditions are secure:

• If you’re a Zensurance client, contact us right away
• Document all damages with photographs and videos
• Compile an inventory of all property that was harmed
• Retain all purchase records, receipts, and invoices
• Take practical measures to avoid additional damage
• Save receipts for temporary storage, cleanup, and urgent repairs
• Don’t throw away damaged items unless they pose a safety hazard or your insurer gives permission
• Hold off on permanent repairs until the insurance provider can evaluate the damage

Because insurance policies typically include deadlines for reporting claims, report losses promptly and follow the guidance given by your broker or insurer. 

Get Commercial Property Insurance with Flood Coverage Easily

Get the customized commercial property insurance policy your business needs to help protect your property, contents, and finances from losses caused by extreme weather and natural disasters.

Fill out our online application for a free quote.

Our team of knowledgeable brokers will shop our partner network of 50+ insurers to get the comprehensive coverage your small business needs at an affordable price and tailor it to suit your requirements.

– Updated July 27, 2026.

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