What happens if my car floods in underground parking?

Originally written: August 24, 2022 by Liam Lahey

If your car floods in an underground parking garage, insurers usually consider it as water damage. Often the car is a total loss if the water reaches critical components like the engine, electronics, or interior.

But whether you’re covered depends on your insurance. Comprehensive coverage typically pays for flood damage, but not basic liability insurance.

Flooding is no longer a rare event in Canada, and underground parking garages are increasingly at risk.

In recent years, extreme weather impacts have intensified. In 2025, insured damage caused by severe weather events exceeded $2.4 billion, according to Catastrophe Indices and Quantification Inc. (CatIQ). This makes 2025 the tenth costliest year on record for severe weather–related insured losses in Canada.

From flash floods to heavy rainfall, these events can quickly overwhelm drainage systems, leaving parked vehicles submerged. Here’s what that means for your car, your insurance, and what to do next.

Is a flooded car repairable or a write-off?

In many cases, a flooded car is declared a total loss.

According to Insurance Bureau of Canada (IBC), any vehicle that has been submerged up to the bottom of the dashboard must be branded 'non-repairable' and cannot be driven again on Canadian roads.

Even when the damage appears minor, water can cause serious and lasting issues, including:

• Electrical system failure
• Engine and transmission damage
• Mold and corrosion inside the vehicle

Given these risks and repair costs, insurers often determine that flood-damaged vehicles are unsafe or not worth repairing.

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Does condo insurance cover a flooded car in underground parking?

A condo corporation’s insurance policy does not automatically cover damage to a vehicle parked in an underground lot. Even though the parking garage may be considered a common area, the building is generally not responsible for your car in the event of flooding.

Most condo corporations have insurance for the building, as well as the common areas. Tenants or unit owners typically pay the building’s insurance premium as part of their monthly maintenance fees, but they should also consider either condo insurance (for unit owners) or tenant insurance (for renters) to protect their personal belongings.

If your car is damaged in a flood, you will need to file a claim through your auto insurance policy, provided you have the right coverage.

In case of damage to the underground parking structure, repairs would be covered by the condo corporation’s master policy.

Learn more: How to protect your home from severe weather

Does car insurance cover flood damage in Canada?

It depends on your policy. Flood damage is typically covered only if you have optional auto insurance coverage, such as:

• Comprehensive coverage
• All-perils coverage
• Specified perils coverage

These add-ons protect against non-collision risks, including flooding caused by heavy rain, melting snow, or rising water.

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Can a small amount of water damage your car?

Yes. Even shallow water can pose a serious risk to your car.

According to ICBC, 10 centimetres of water is the safe upper limit for driving a standard car. At 15 centimetres, water can reach the bottom of most vehicles and cause loss of control or engine stalling.

Beyond that, the risks increase quickly. Floodwater can enter sensitive components, damaging your vehicle’s electrical systems, engine, and braking performance. It can also lead to longer term issues, such as corrosion or mould.

How to prevent your car from flooding in a basement

The most effective step is to move your car before a storm arrives. Underground garages flood faster than expected, and once water starts rising, retrieval becomes dangerous. Heeding building alerts early and having comprehensive auto insurance are your best defences.

Here's how to reduce risk of your car flooding and respond effectively:

• Move your vehicle early: If severe weather is forecast, relocate your car to higher ground as soon as possible. Underground garages are particularly vulnerable to water accumulation. Waiting too long can make it unsafe or impossible to retrieve your vehicle.
• Pay attention to building alerts: Many residential and commercial buildings issue flood warnings or evacuation notices for parking areas. Take these seriously—water levels can rise rapidly and without much visible warning.
• Avoid attempting last-minute retrieval: If water has already started entering the garage, do not attempt to drive into or through standing water. You may not be able to judge water depth. Electrical systems, structural hazards, or stalled vehicles could pose serious risks.
• Do not start a submerged or water-exposed vehicle: If your car has been in standing water, do not attempt to start it. This can worsen engine damage. Have it inspected by a professional first.
• Document damage and contact your insurer: As soon as it’s safe, take photos of water damage and report the incident to your insurance provider. Check whether your policy includes comprehensive coverage, which typically covers flood damage.
• Get a professional inspection: Even if the car appears functional, have it thoroughly inspected by a mechanic. Water damage isn’t always immediately visible and can lead to long-term issues if untreated.

If flooding becomes more common across Canada, having the right insurance coverage can make all the difference in protecting your vehicle and your finances. 

Read more: Rebates for resiliency changes to your home reduce future insurance claims 

Frequently Asked Questions (FAQ)

1. Does comprehensive car insurance cover flood damage in Canada?

   Yes. Comprehensive coverage, along with all-perils and specified perils coverage, protects against flood damage from heavy rain, melting snow, or rising water. Basic liability insurance does not cover flood damage.

2. At what point is a flooded car considered a write-off?

   Any vehicle submerged up to the bottom of the dashboard must be branded 'non-repairable' under nationwide rules and cannot be driven on Canadian roads again. Even cars with seemingly minor water exposure are often written off due to the cost of electrical, mechanical, and mold repairs.

3. Does condo or tenant insurance cover a car flooded in an underground garage?

   No. A condo corporation's building insurance covers the structure and common areas, not individual vehicles. You need your own auto insurance policy with the right optional coverage to be protected. Damage to the garage structure itself would fall under the condo corporation's master policy.

4. How much water does it take to damage a car?

   Very little. According to ICBC, 10 centimetres is the safe upper limit for driving through water. At 15 centimetres, most vehicles risk stalling or losing control. Beyond that, floodwater can damage electrical systems, the engine, and braking performance, and lead to long-term corrosion or mould.