Sandra Astolfo is a Partner at WeirFoulds with a practise devoted to infrastructure and construction law. She has worked with her clients for more than 22 years and is a frequent speaker at continuing legal education programs and industry conferences.

From negotiating construction agreements, to providing contract administration advice, to litigating, mediating and arbitrating disputes, Sandra advocates on behalf of all project participants. She also assists her clients with protecting their interests in the event of a project participant’s insolvency.

Sandra is a Fellow of both the Canadian College of Construction Lawyers and the Construction Lawyers Society of America. Both are associations composed of outstanding lawyers who are distinguished for their skill, experience and high standards of professional and ethical conduct.

She is certified by The Law Society of Ontario as a Specialist in Construction Law and has authored numerous articles on various construction law topics.


    • Recipient of the Ontario Bar Association’s 2019 Construction and Infrastructure Law Award of Excellence (Sandra is the first female recipient of the award)
    • Repeatedly recognized by Best Lawyers in Canada as a leading lawyer in Construction Law
    • Repeatedly recognized in the Canadian Legal Lexpert® Directory as a leading lawyer in Construction Law
    Called to the Bar
    • Ontario (1995)
    • LL.B., Queen's University, 1993
    • B.A. (Hons.), York University, 1990
    • Canadian College of Construction Lawyers, Fellow
    • Construction Lawyers Society of America, Fellow
    • The Law Society of Upper Canada - Specialist in Construction Law
    • The Advocates' Society
    • Ontario Bar Association Construction & Infrastructure Law Section

    Speaking Engagements

    Speaker, 2019 Construction Adjudication Symposium Significant Change - Time for Alignment, RICS and CIArb, Toronto, ON, May 29, 2019
    Co-Chair, "Construction Law: Arbitration and Adjudication Advocacy", The Advocates' Society, Toronto, ON, April 30, 2019
    Moderator, "Top Construction Cases: How Have Courts Balanced the Right to Litigate with Contract Provisions Directing the Parties to Arbitration?", "Negotiating Effective Arbitration Agreements", and "Tips from the Arbitrators on Effective Advocacy at Arbitration", Construction Law: Lien and Arbitration Advocacy, The Advocates' Society, Toronto, ON, April 21, 2019
    Speaker, “Rights and Remedies of the Municipality when the Contractor Defaults”, Current Issues in Municipal Infrastructure Projects, Municipal Infrastructure Forum, Kleinburg, ON, April 15, 2019
    Speaker, "Construction Law Update: The Latest Cases Affecting Your Projects", The Buildings Show, Toronto, ON, November 28, 2018
    Speaker, "The Construction Act - Adjudication", Construction Act 2017 Commercial Acumen Workshop, Adjudico Inc., November 8, 2018
    Speaker, "Construction Bonding and Insurance: A Primer on Construction Risk Management", OBA/CBA, October 1, 2018
    Speaker, "Bill 142, Construction Lien Amendment Act", Sealant and Waterproofing Association, Richmond Hill, ON, May 3, 2018
    Program Chair, "Construction Law: Arbitration and Adjudication Advocacy" The Advocates' Society, Toronto, ON, April 27, 2018
    Speaker, "Key Update on the New Construction Act", The Canadian Bar Association, Toronto, ON, April 19, 2018

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