For 100 years, we've built a solid reputation for completing quality projects on time and on budget.

Building Excellence since 1914

M. Sullivan & Son Limited is one of Canada’s oldest family-owned construction companies. Founded in 1914, we are very proud to celebrate our 100th anniversary as a full service general contracting firm. Our 100 years of continuous service are clear evidence of our dedication to quality and our financial and corporate stability.

Management Excellence

Our reputation for completing quality projects on time and on budget, consistently meeting or exceeding expectations for quality and safety, has led to our ongoing recognition as a Platinum member of Canada’s Best Managed Companies – a designation we pledge to maintain.

Everything they’ve built for us has been of very high quality. Obviously when you are building for perpetuity, that’s what you’re looking for and they’ve certainly delivered it.

Bill Leggett, former Queen’s University principal


Queen’s University Richardson Stadium Revitalization

Ontario Power Generation Inc. – Cornwall Energy and Information

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Quality Assurance

At M. Sullivan & Son Limited, high quality is not a vaue promise. This goal is achieved through a quality management system (QMS) that meets the strict requirements of the ISO 9001:2008 standard which we have complied with since 2009.

Committed to LEED

M. Sullivan & Son Limited has thrived for a century partly because we honour not only the traditions of our craft, but also the innovations that serve to strengthen those traditions over time.

Customer Service Policy

In fulfilling our mission, M. Sullivan & Son Limited will strive at all times to provide its goods and services in a way that respects the dignity and independence of people, including people with disabilities.


M. Sullivan & Son’s head office is located in Arnprior, Ontario with an office in Kingston, Ontario since 1949. We are also located in Ottawa and North Bay, Ontario.

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