Sébastien Duval

With over 15 years of industry-leading experience, Sébastien Duval has established himself as one of Atlantic Canada’s most trusted authorities in commercial real estate. His advisory work spans every major asset class -industrial, retail, office, land development, and investment sales - where he represents landlords, investors, and occupiers with precision, integrity, and a relentless focus on value creation.

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As the Founder and Managing Director of ONE. Commercial and CENTURY 21 Generation, Sébastien leads two complementary brands united by a single mission: to deliver real, relevant results through insight, strategy, and execution. His approach blends data-driven market intelligence with an entrepreneurial instinct for opportunity -helping clients unlock potential, grow portfolios, and navigate complex transactions with clarity and confidence.

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Over the course of his career, Sébastien has built an extensive network of local, regional, and national relationships, earning a reputation for his professionalism, discretion, and results-oriented mindset. His leadership continues to shape the evolution of Atlantic Canada’s commercial real estate landscape - bridging global standards with a distinctly local understanding of the markets he serves.

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“I want my clients to remember the value I’ve brought them long after the deal is done.”
- Sébastien Duval

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Outside the office, Sébastien enjoys time with his wife, Stéphanie, and their three children - Olivier, Nico, and Ellie. An avid mountain biker, trail runner, and lifelong learner, he brings the same focus and drive to his personal pursuits as he does to his professional mission: building an enduring impact, one relationship at a time.