Flood zone · Vaudreuil-Dorion and Rigaud · 2026
The map in force in Vaudreuil-Dorion and Rigaud, what the City put in place, what the 2026 framework allows, and the checklist for a house near the Ottawa River and Lac des Deux Montagnes.
Flood zone in Vaudreuil-Dorion and Rigaud in 2026: Vaudreuil-Dorion is within the CMM territory, covered by the preliminary new-generation map (Lac des Deux Montagnes, Lac Saint-Louis); Rigaud and Pointe-Fortune are outside the CMM, and the MRC de Vaudreuil-Soulanges, the ministry's technical agent, supplied them a hypothetical, unofficial map with no legal value to measure the framework's effect. The MRC's modelling accounts for the 2017, 2019 and 2023 floods of the Ottawa River and the anticipated effects of climate change; the Town of Rigaud keeps a spring flood page with the state of the situation. The modernized regulatory framework of 1 March 2026 applies: new residence prohibited in the moderate, high and very high classes and in the high-current zone, permitted under conditions in the low class; rebuilding under conditions; maintenance permitted. Before buying near the Ottawa River and Lac des Deux Montagnes: the written class for the address, an insurance quote with the flood endorsement, a lender's position (Desjardins no longer lends in high-current zones since February 2024), the certificate of location and the seller's declaration. Sources read on 15 September 2026.
Vaudreuil-Dorion is within the CMM territory, covered by the preliminary new-generation map (Lac des Deux Montagnes, Lac Saint-Louis); Rigaud and Pointe-Fortune are outside the CMM, and the MRC de Vaudreuil-Soulanges, the ministry's technical agent, supplied them a hypothetical, unofficial map with no legal value to measure the framework's effect. The official map for those sectors awaits government approval.
The MRC's modelling accounts for the 2017, 2019 and 2023 floods of the Ottawa River and the anticipated effects of climate change; the Town of Rigaud keeps a spring flood page with the state of the situation. The MRC filed a brief in October 2024 asking for a more resilient approach for existing buildings.
In Vaudreuil-Dorion, the City's interactive map shows the zones in force; in Rigaud, call the planning department before the offer, because the hypothetical map and the official map may differ. The modernized framework's rules apply everywhere: new residence prohibited in the moderate to very high classes and in the high-current zone, rebuilding under conditions, maintenance permitted; the detail is in renovating or rebuilding in a flood zone.
The written class, the certificate, proof of restoration or immunisation, an insurance quote for the address and a lender's position: that is the file that defends the price, described in selling a house in a flood zone. A broker from the team who knows Vaudreuil-Dorion and Rigaud builds it before listing.
Vaudreuil-Dorion is within the CMM territory, covered by the preliminary new-generation map (Lac des Deux Montagnes, Lac Saint-Louis); Rigaud and Pointe-Fortune are outside the CMM, and the MRC de Vaudreuil-Soulanges, the ministry's technical agent, supplied them a hypothetical, unofficial map with no legal value to measure the framework's effect. A recent certificate of location and the seller's declaration complete the answer.
A new residence is prohibited in the moderate to very high classes and in the high-current zone, permitted under conditions in the low class; rebuilding after a disaster is permitted under conditions, with a municipal permit and often immunisation.
By class and by the house's history: the flood endorsement can be offered or refused by the insurer, and Desjardins no longer lends in high-current zones since February 2024; other lenders judge case by case.
Sources: mrcvs.ca (20 novembre 2024), ville.rigaud.qc.ca (crue printanière), ville.vaudreuil-dorion.qc.ca (carte interactive), CMM, lus le 15 septembre 2026; Québec.ca (regulatory framework of 1 March 2026). Informational page: the City decides for your address.
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Also available in French: version française de ce guide.
Published September 7, 2026 by the Loaa & Manseur team, the number 1 team at RE/MAX Platine in 2024 and 2025, 6th RE/MAX team in Quebec, 15th in Canada and in the global top 50 according to the official RE/MAX ranking. Tell us about your project.
Équipe no 1 de RE/MAX Platine en 2024 et en 2025, 6e au Québec, 15e au Canada et dans le top 50 mondial au classement officiel RE/MAX. Réponse en moins de 24 heures, sept jours sur sept.