How long has KMB Law been practising in Mississauga?

The firm traces back to 1979, when John Keyser, Colin Mason, and John Ball opened Keyser Mason Ball, LLP with five employees. It's operated in the Mississauga area for more than 45 years since.

Is KMB Law the same firm as Hoffer Adler LLP?

In September 2024, Keyser Mason Ball, LLP merged with Hoffer Adler LLP. The combined firm continues under the KMB Law name, with offices in Mississauga, Burlington, downtown Toronto, and Markham.

Can KMB Law help me buy into or set up a franchise?

Yes. KMB Law's franchise group advises both franchisors and franchisees on agreements, due diligence, and disputes, and the firm has belonged to the Canadian Franchise Association for more than 15 years.

Does KMB Law handle divorce and child custody matters?

Yes. The firm's family law group works on divorce, custody and parenting arrangements, support, and separation agreements, and it includes Arabic and Greek speaking lawyers.

Can KMB Law register a trademark for my business?

The firm's intellectual property lawyers are qualified as trademark agents and represent clients before the Canadian Intellectual Property Office, including Madrid Protocol filings for trademark protection outside Canada.

Where are KMB Law's offices located?

KMB Law has four Ontario offices: its head office at 3 Robert Speck Parkway in Mississauga, plus offices in Burlington, downtown Toronto, and Markham.

KMB Law | LawOnline Directory

About KMB Law

KMB Law is the trading name of Keyser Mason Ball, LLP, a business and family law firm headquartered in Mississauga, Ontario for more than 45 years. Founders John Keyser and Colin Mason, former classmates, along with their colleague John Ball, opened the firm's doors in 1979 with five employees, working from what the firm describes as an outbuilding in the heart of Mississauga. The firm's head office is now in the Mississauga Executive Centre, with additional offices in Burlington, downtown Toronto, and Markham.

In September 2024, Keyser Mason Ball merged with Hoffer Adler LLP, a Toronto firm with a franchise, intellectual property, and commercial and civil litigation practice. The combined firm kept the KMB Law name and gained its downtown Toronto office in the process. Today KMB Law covers a broad range of practice areas, from corporate and commercial law and real estate to family law, franchise law, and intellectual property. It belongs to the Lawpact and XLNC networks of independent law and accounting firms around the world, and its family law group includes Arabic and Greek speaking lawyers.

Practice areas

Business & Corporate Law

Wills, Estates & Trusts

Civil Litigation & Dispute Resolution

Construction Law

Employment & Labour Law

Family Law

Intellectual Property

Real Estate Law

Milestones & recognition

In 1979, John Keyser, Colin Mason, and John Ball opened Keyser Mason Ball, LLP in Mississauga with five employees.
In September 2024, the firm merged with Toronto's Hoffer Adler LLP, adding a downtown Toronto office and expanding its franchise, intellectual property, and litigation practices under the continuing KMB Law name.
Seven KMB Law lawyers were named in the 2026 edition of Best Lawyers in Canada, and two more were named to Best Lawyers: Ones to Watch in Canada.
The firm has been a member of the Canadian Franchise Association for more than 15 years.

In the community

KMB Law supports Trillium Health Partners, the Peel Children's Aid Foundation, The Riverwood Conservancy, the Mississauga Firefighters Benevolent Fund, and Community Foundation Mississauga.
The firm takes part in the CIBC Run for the Cure and raises funds for the Breast Cancer Society of Canada.
Articling students at the firm have taken part in Pro Bono Students Canada projects and competed in law school moots, including the Harold G. Fox Intellectual Property Moot.

Good to know

Wheelchair accessible A rainbow pride heart

LGBTQ+ friendly A gold parking sign with a green checkmark

Free parking A laptop showing a video call

Virtual appointments

Lawyers 39

This firm’s lawyers at a glance

Called to the bar: 1979–2025 · median 9 years in practice 39 of 39 lawyers
Law schools: University of Windsor (8), Dalhousie University (4), Queen's University (4), Western University (4), Osgoode Hall Law School (3), University of Calgary (2) and 11 more 39 of 39 lawyers
Languages on the roster: Arabic, English, French, Greek, Hindi, Italian, Mandarin, Punjabi, Serbian, Urdu

Who handles what

Offices 4

Mississauga Head Office905-276-9111

3 Robert Speck Parkway, Suite 900, Mississauga, ON L4Z 2G5

Burlington905-276-9111

3115 Harvester Rd., Suite 400, Burlington, ON L7N 3N8

Downtown Toronto905-276-9111

595 Bay St., Suite 1102, Toronto, ON M5G 2C2

Markham905-276-9111

85 Enterprise Blvd., Suite 400, Markham, ON L6G 0B5

The neighbourhood

KMB Law's head office sits at 3 Robert Speck Parkway, part of the Mississauga Executive Centre in the middle of Mississauga's City Centre financial district, which runs along Hurontario Street and Robert Speck Parkway. The parkway takes its name from Robert Speck, the first mayor of the Town of Mississauga, and leads toward Square One Shopping Centre a short walk away.

The firm's downtown Toronto office, added when Keyser Mason Ball merged with Hoffer Adler LLP in 2024, is in the Atrium on Bay tower at 595 Bay Street, next to Yonge-Dundas Square and across from the Toronto Eaton Centre. The building is connected to the PATH network and has direct access to the Dundas subway station, convenient for clients coming downtown for real estate, franchise, or litigation matters.

Legal support staff 1

Law clerks, paralegals and articling students at this firm. They are not licensed lawyers.

Lisa Hoff GENERAL MANAGER

Frequently asked questions

How long has KMB Law been practising in Mississauga?: The firm traces back to 1979, when John Keyser, Colin Mason, and John Ball opened Keyser Mason Ball, LLP with five employees. It's operated in the Mississauga area for more than 45 years since.
Is KMB Law the same firm as Hoffer Adler LLP?: In September 2024, Keyser Mason Ball, LLP merged with Hoffer Adler LLP. The combined firm continues under the KMB Law name, with offices in Mississauga, Burlington, downtown Toronto, and Markham.
Can KMB Law help me buy into or set up a franchise?: Yes. KMB Law's franchise group advises both franchisors and franchisees on agreements, due diligence, and disputes, and the firm has belonged to the Canadian Franchise Association for more than 15 years.
Does KMB Law handle divorce and child custody matters?: Yes. The firm's family law group works on divorce, custody and parenting arrangements, support, and separation agreements, and it includes Arabic and Greek speaking lawyers.
Can KMB Law register a trademark for my business?: The firm's intellectual property lawyers are qualified as trademark agents and represent clients before the Canadian Intellectual Property Office, including Madrid Protocol filings for trademark protection outside Canada.
Where are KMB Law's offices located?: KMB Law has four Ontario offices: its head office at 3 Robert Speck Parkway in Mississauga, plus offices in Burlington, downtown Toronto, and Markham.

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Listing compiled from the firm’s public website in August 2026. Verify licence status in the Law Society of Ontario directory ↗