Matthew Alter


Cassels Brock
Suite 2100, Scotia Plaza
40 King Street West
Toronto, ON M5H 3C2

Tel: 416 860 6764
Fax: 416 640 3083


Matthew Alter is a partner in the Construction and Infrastructure Groups at Cassels Brock. His practice focuses on representing public and private owners, general contractors and other construction industry participants in all aspects of construction and procurement. He advises clients on project delivery methods and procurement processes, and drafts and negotiates various agreements for construction and infrastructure projects and related acquisitions, including Private Public Partnership arrangements. Matthew also represents participants in all types of contract and project disputes and litigation, including: tendering claims and defences, contractor defaults, interference and delay claims, liens, trust claims, insolvency claims and surety bond claims.

Matthew has been recognized internationally as a top construction and procurement lawyer by the Lexpert/American Lawyer Guide to the Leading 500 Lawyers in Canada, the Canadian Legal Lexpert Directory, the International Who’s Who of Business Lawyers, Who’s Who Legal Canada, and Best Lawyers in Canada. He has also been included in the Lexpert Special Edition on Canada’s leading infrastructure lawyers.

Matthew is the immediate past Chair of the International Construction Division of the American Bar Association’s Forum on the Construction Industry and currently serves as a Governor of the Canadian College of Construction Lawyers and as editor of the Journal of the Canadian College of Construction Lawyers. Matthew is also a past Chair of both the Ontario Bar Association’s Construction Law Section and the Law Society of Upper Canada’s Construction Law Specialty Committee, and was also among the first lawyers in Ontario to be certified as a Specialist in Construction Law.

Construction is a high-risk business. Cassels Brock can provide a buffer against that risk with its seasoned legal team, guiding clients through all phases of construction, from procurement to contract to completion.

Cassels Brock is home to one of Canada’s pre-eminent construction law practices. Members of our group have been listed in Best Lawyers in Canada and the Canadian Legal Lexpert Directory of lawyers in Canada in the “Consistently Recommended” category for the past several years. Our substantial experience in dealing with construction issues and our relationships with members of the bench and bar involved in the adjudication of construction disputes allow us to provide cost-effective services and practical solutions.

Our Construction Law Group works closely with our Land Development Group and has represented all of the “players” in the construction industry including contractors, subcontractors, suppliers, developers, owners (both private and public), design professionals, insurance and bonding companies, lenders (both private and institutional), and environmental professionals.

Many of our clients are referred to us by other clients and, in this way, we have attracted both Canadian and foreign clients from every facet of the construction industry. Others retain us because they have heard of us through our extensive professional activities, including our construction industry seminars; our bar association activities; our membership in the Canadian College of Construction Lawyers; and our articles and books on construction-related topics.

  • Canadian law firm of more than 200 lawyers based in Toronto and Vancouver focused on serving the transaction, advocacy and advisory needs of the country’s most dynamic business sectors
  • Emphasis on core practice areas of mergers and acquisitions, securities, finance, corporate and commercial law, litigation, taxation, intellectual property and information technology, international business and government relations
  • One of the largest business law practices in Canada, serving multinational, national and mid-market entities and with a particular strength in the mining and natural resources sector
  • Consistently ranked at or near the top of Bloomberg, Thomson Financial and Mergermarket deals league tables for mergers and acquisitions and equity offerings
  • Cited as market leaders by Chambers Global, ALM 500, Best Lawyers, Lexpert, Global Counsel and others
  • Regularly act on deals honoured at the Canadian Dealmakers’ Gala and for counsel recognized at the Canadian General Counsel Awards
  • Dedicated to staying on the leading edge of trends in law and business to offer timely proactive and preventative advice that adds demonstrable value
  • Serving leadership roles in business, political, civic, charitable and cultural organizations in community, national and international organizations
“Matthew Alter of Cassels Brock & Blackwell LLP enjoys a burgeoning reputation in the construction sector. One client said: “He’s extremely thoughtful and evaluates the entire picture. He certainly watches out for our interests and makes sure we don’t miss anything.”
Chambers & Partners, 2016