New flood maps: Has your home just lost value?

Quebec’s new flood zone maps, effective March 1, 2026, redefine the flood risk for hundreds of thousands of residential properties. The Ministry of the Environment (MELCCFP) has replaced the old two-zone system with a framework with four levels of intensity: Very High, High, Moderate and Low. About 30% more residences could now be classified as at risk, according to estimates. With 340,000 properties exposed to flooding in Quebec and 325,000 households without access to flood insurance, this reform directly affects real estate value, access to mortgage financing and home insurance coverage. Here’s what you need to know to protect your wealth.

What changes on 1 March 2026: the new regulatory framework

Quebec has just taken a historic step in flood risk management. The MELCCFP’s new regulatory framework, which came into effect on March 1, 2026, replaces a decades-old system that classified zones into only two categories: the 0-20 year recurrence zone and the 0-100 year recurrence zone. This simplistic system no longer reflected the reality of the risks, especially in a context of climate change that intensifies extreme weather events.

The 4 new intensity levels

The new system introduces a much finer classification that allows for a better assessment of the real risk for each property:

According to Radio-Canada, this cartographic revision now incorporates the most recent data on historical floods, climate projections and high-precision topography obtained by LiDAR technology. The result: a much more detailed mapping that could reclassify about 30% more residences in a risk category.

A reminder of the historic floods in Quebec

This reform comes in a context marked by major disasters. In 2017, spring flooding affected 261 municipalities and more than 5,400 homes, resulting in estimated government costs of nearly $300 million. In 2019, the failure of the Sainte-Marthe-sur-le-Lac dike hit 314 municipalities, generating $438 million in claims from the government. Nationally, insured losses from natural disasters reached a record $8.5 billion in 2024, according to the Insurance Bureau of Canada (IBC). Flooding alone accounts for 75% of disaster relief costs.

How to check if your home is in a flood zone

The first step for any homeowner is to know their exact situation. Professor Michael Bourdeau-Brien of Université Laval sums it up well: “Not knowing the risk leads to poor purchase, renovation and insurance decisions.” Here are the tools at your disposal:

1. The Geo-Flood Platform

2. Other means of verification

In addition to the online platform, several additional resources exist:

• Your certificate of location — This official document, prepared by a land surveyor, indicates whether your property is located in a flood zone. Check its date: a certificate older than 10 years may not reflect the new cards.
• Your municipality or MRC — The urban planning department can confirm the classification of your land according to the new maps. The Government of Quebec’s website also lists the maps in effect by region.
• A land surveyor (OAGQ) — For an accurate assessment of your property, a land surveyor can carry out a topographic survey and determine the exact elevation of your property in relation to flood levels.
• Your insurance broker — An independent insurance broker often has access to additional risk data and can help you assess your exposure.

Impact on the value of your property

This is the question that thousands of Quebec homeowners are asking: Has my home lost value? The available data provide a nuanced but worrying picture.

Depreciation in figures

According to studies conducted in Canada and abroad, the impact on real estate values can be measured at two levels:

Several factors influence the extent of the depreciation: the availability of insurance, the perception of potential buyers, the proximity of the last loss and the construction restrictions imposed by the municipality. A property that cannot be provided for flood coverage will see its value drop more significantly than an insurable property.

Impact on your mortgage

Beyond market value, the new flood maps have a direct impact on mortgage financing. Financial institutions are currently reassessing their exposure to flood risk, and the decisions already taken are sending a clear signal to the market.

Desjardins’ decision

In February 2024, Desjardins announced that it was stopping mortgage loans for properties located in very high-risk flood zones. The decision, the first of its kind in Quebec, has shaken up the real estate market and could prompt other lenders to adopt similar policies.

For homeowners already in a flood zone, the implications are multiple:

• Mortgage renewal — Your lender may require proof of flood insurance at the time of renewal, which may not have been the case before.
• Refinancing — Access to refinancing may be limited if your property is classified as a high-risk or very high-risk area.
• Resale — Potential buyers may have difficulty obtaining financing, reducing the pool of buyers and, therefore, the selling price.
• CMHC requirements — The Canada Mortgage and Housing Corporation now requires proof of flood insurance for properties located in at-risk areas when issuing an insured loan.

Does your home insurance cover flooding?

This is a crucial question, and the answer often surprises homeowners. Most basic home insurance policies in Quebec do not cover damage caused by flooding related to the overflow of a river or spring flooding.

What is generally covered vs. excluded

The surface water endorsement: your best protection

To be protected against flooding, you must add a specific rider to your home insurance policy. This endorsement, often referred to as the “surface water endorsement” or the “flood endorsement,” covers damage caused by water from outside your home, including overflowing waterways and runoff.

The problem: according to the IBC, about 325,000 Quebec households do not have access to affordable flood coverage, often because their property is located in an area of too high a risk. If you are in this situation, it is all the more important to consult an independent insurance broker who will be able to explore all the options available on the market.

What to do if you are newly classified as a flood zone

If the new maps put your property in a flood zone for the first time, don’t panic. Here are the 8 concrete steps you can take to protect your investment:

1. Check your exact classification — Go to Geo-Flooding to find out exactly what your intensity level is. Each level has different implications.
2. Check your home insurance policy — Carefully review the exclusions in your current policy. Look for flooding, overflowing and surface water records.
3. Contact an insurance broker — An independent broker can analyze your contract, identify coverage gaps, and shop with multiple insurers to get the most advantageous flood endorsement.
4. Inform your mortgage lender — Proactively contact your financial institution. Proof of flood insurance may be required at the next renewal.
5. Invest in prevention — Install a check valve, upgrade your sump pump, check your foundation for leaks. These investments can also reduce your insurance premiums.
6. Update your certificate of location — Have a new certificate prepared by a land surveyor to reflect the new maps. This document will be essential during a possible sale.
7. Document the current condition of your property — Photograph and film the interior and exterior of your home. Keep the invoices for your valuables. This evidence will be valuable in the event of a claim.
8. Monitor government programs — Stay informed about relief programs, prevention grants, and the evolution of the national flood insurance program.

Preventive measures to reduce your risk

Even if your property is in a flood zone, concrete measures can significantly reduce your risk and potentially lower your insurance premiums. According to Protégez-Vous, these preventive investments are among the most profitable that a homeowner can make.

Some municipalities offer grants for the installation of preventive measures. Check with your city. Also, let your insurer know about any improvements you make — these measures may entitle you to a discount on your home insurance premium.

The National Flood Insurance Program: Where Do We Stand?

For several years, the federal government has been working on creating a national flood insurance program for homeowners who do not have access to affordable private coverage. This program, modeled after the U.S. National Flood Insurance Program, aims to bridge the gap that leaves hundreds of thousands of Canadians unprotected.

However, the Insurance Bureau of Canada sums up the current impasse: “Conversations between the federal and provincial governments have not yet taken place in sufficient depth to result in a concrete program.” In the meantime, homeowners must rely on the private insurance market to protect themselves.

If you own a condo in a flood zone, you should know that the situation is even more complex. Your condo corporation’s coverage may not include flood protection, and your individual insurance may contain specific exclusions. Check both levels of coverage.

Sell or Stay: How to Make the Right Decision

Faced with a reclassification as a flood zone, some owners plan to sell quickly before the value of their property drops further. Before making this decision, consider the following:

• Duty to disclose — In Quebec, the seller has a legal obligation to declare that their property is in a flood zone. Attempting to sell without disclosing this information could result in prosecution.
• The market is adjusting — Informed buyers are already factoring flood risk into their offerings. Panic selling could cause you to lose more than the actual depreciation.
• Invest in prevention — Well-documented mitigation work (valve, pump, waterproofing) reassures buyers and can maintain value.
• Get the right coverage — A property that is properly insured against flooding is more attractive to buyers and lenders.

If you are thinking of cancelling your insurance to save on costs, be aware that it is usually a bad idea in a flood zone. Without coverage, you assume the entire financial risk alone.

Frequently Asked Questions (FAQs)