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Proudly Serving the Peel Region Since 1978.


The Tannahill, Lockhart & Clark Law team has a combined legal experience of close to 150 years. We are proud of our history serving the legal needs of businesses and residents across Peel Region and of our reputation for personalized legal representation, caring and respect. When you work with our team, you can be confident in our ability to actively represent you and we always pursue the best course of legal action for your particular needs. You are not just another file at TLCL. We are a law firm that genuinely cares about the well-being of our clients.

Practice Areas


Tannahill, Lockhart & Clark Law LLP is a general law firm based in Mississauga that has been serving the Peel Region (Brampton, Mississauga, Caledon) and other areas within the Greater Toronto Area for close to 40 years. Our main areas of legal practice include Wills and Estates, Civil Litigation, (including Personal Injury), Estate Litigation, Real Estate,and Business Law. We are an established business who has earned a solid reputation for understanding our clients’ personal and business needs, being results-oriented, practical, smart, cost-effective and responsive.

Our client testimonials speak to our personal approach and to our professionalism.

Wills and Estates

Our legal team has decades of experience in the area of Wills and Estates, and we provide our clients with a wide range of expertise for all of their estate planning needs. We work closely with our clients to develop comprehensive estate plans and the documents required to implement them. Our clients include individuals, estate trustees, financial institutions and trust companies.

Civil Litigation

For over 40 years our law firm has provided legal representation covering personal injury, estate litigation, wrongful dismissal, small claims, construction liens, commercial litigation and real estate litigation. Our knowledge and experience in all of these areas have provided solid results to our clients.

Estate Litigation

When a dispute arises between family members and estate beneficiaries, our legal team have the knowledge and experience to help our clients reach a fair and cost-effective resolution to the conflict.

Real Estate Law

We can help with residential purchases and sales, mortgages and financing, development and planning, and Applications for Absolute Title. We specialize in various forms of litigation, including real estate. Because when things go wrong with a real estate transaction, pending or otherwise, there is a critical, important role for a real estate litigation lawyer to play in areas such as commercial lease disputes, mortgage disputes or title disputes.

Business Law

Commercial leasing, purchase and sale, contracts, shareholder agreements, corporate re-structuring and charitable status registrations, are all areas of Business Law that we have significant experience and knowledge that benefit our clients.