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Aaron I. Grossman listen


Aaron* is Construction Counsel at Lenczner Slaght. He is a fierce advocate who works tirelessly to advance his clients’ interests within the construction and real estate sector. Aaron’s many years of educational and practical experience in structural engineering builds§ a strong foundation for his expertise and helps him solve his clients’ legal issues. Having Aaron on their side inspires confidence in his clients as they benefit from his ability to quickly understand both the technical and legal aspects of a dispute and provide expert insight and service as a result. .



Aaron I. Grossman

is Construction Counsel at Lenczner Slaght.

Aaron’s practice focuses on litigating disputes within the construction and real estate sectors. Due to his many years of educational and practical experience in structural engineering, Aaron excels in highly technical cases which require expert evidence. He can speak the same language as engineering and construction professionals allowing for efficient and successful representation of his clients from the outset of a matter through to trial. 

Aaron is experienced in resolving complicated engineering and construction disputes by negotiation and mediation. His clients look to him for strategic and practical advice to resolve their technical legal disputes in the courtroom and the boardroom.  

Prior to attending law school, Aaron studied and practiced structural engineering, concentrating on building design and construction. Before joining Lenczner Slaght, Aaron was a partner at a mid-sized law firm in downtown Toronto.

  • Various Stakeholders

    Counsel to various stakeholders in competing applications for the appointment of a receiver and manager pursuant to subsection 243(1) the Bankruptcy and Insolvency Act, section 101 of the Courts of Justice Act, and an application for protection under the Companies’ Creditors Arrangement Act.   

    Shara N. Roy, Aaron I. Grossman & Sahar Talebi | April 1, 2020

  • Construction Arbitration

    Counsel to a general contractor in respect of a complex mediation/prospective arbitration process regarding a subway extension project.

    Matthew Sammon, Andrew Parley, Andrea Wheeler, Aaron I. Grossman, Scott Rollwagen, Sarah Millar & Christina Shiels-Singh | August 30, 2019

  • Construction Dispute

    Counsel to a general contractor in a dispute with a design subcontractor on a very large transit project regarding design deficiencies and payment for design changes that have arisen over the course of construction.

    Matthew Sammon, Andrew Parley, Aaron I. Grossman, Kelly Hayden, Christina Shiels-Singh & Megan Bradt | January 1, 2019

  • TSCC 2282 v Bay-Yorkville Developments

    Counsel to the defendant developer in proceedings alleging construction deficiencies in the construction of the Four Seasons Residences in Toronto.

    Matthew B. Lerner, Kate Costin, Jonathan D. Langley, Aaron I. Grossman & Megan Bradt | June 30, 2018

  • R v Live Nation

    Counsel to Live Nation in defence of charges under the Occupational Health and Safety Act relating to the 2012 stage collapse at Downsview Park. This included a multi-week trial with an eventual stay of charges under s. 11(b) of the Charter of Rights and Freedoms, and appearing at the related Coroner’s Inquest. (Prior to joining Lenczner Slaght.)

    Aaron I. Grossman | January 30, 1999

  • Transformer Explosion

    Counsel to an electrical utility in defence of a class action and property damage claim following an explosion of a transformer at a large apartment building. (Prior to joining Lenczner Slaght.)

    Aaron I. Grossman | January 29, 1999

  • Professional Negligence Claim

    Counsel to an international engineering consulting firm defending a $20+ million claim of professional negligence relating to the design and construction of a courthouse. (Prior to joining Lenczner Slaght.)

    Aaron I. Grossman | January 28, 1999

  • Green Building - Professional Negligence Defence

    Counsel to an engineering firm for claims related to the installation of green heating and cooling systems. (Prior to joining Lenczner Slaght.)

    Aaron I. Grossman | January 27, 1999

  • Construction Lien

    Counsel for solar energy developer resulting in the registration of construction liens over approximately 20 properties and related contractual dispute with co-developer of the solar energy projects. (Prior to joining Lenczner Slaght.)

    Aaron I. Grossman | January 26, 1999

  • International Arbitration

    Counsel to Canadian and Chinese equipment manufacturer for South American mining project in a claim for breach of contract relating to early cancellation of the contract and the mining project by an international mining firm. (Prior to joining Lenczner Slaght.)

    Aaron I. Grossman | January 24, 1999

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  • Law Society of Ontario

  • Ontario Bar Association

  • The Advocates’ Society

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