About Matteslaw Legal Professional Corporation

Matteslaw Legal Professional Corporation is Joe Mattes's practice, and most of the people it works for are businesses and professionals. Clients come from across Waterloo Region.

Before establishing Matteslaw, Mattes practised law in Toronto and was a partner in a major Waterloo law firm.

Born in Heidelberg, Germany, Mattes grew up in Waterloo Region. An Honours BA in psychology and philosophy from the University of Toronto came in 1980, a law degree from Western University in 1983, and the call to the Ontario bar in 1985.

Practice areas

Corporate and commercial law

Mattes handles corporate and commercial matters, from setting up and reorganizing companies to buying and selling businesses.

Wills, estates and succession

Mattes prepares wills, administers estates and helps owners plan the succession of their businesses.

Notary public

Along with being a barrister and solicitor, Mattes is a notary public.

Good to know

A person using a wheelchairAccessible parkingA calendar with a checkmark beside a clockBy appointment

Milestones & recognition

  • In 1996 Joe Mattes started a newsletter called Technology Businesses and the Law.
  • Mattes wrote articles on business law and on estate planning issues.

In the community

  • Joe Mattes has been a director of the Heart and Stroke Foundation and of the Kiwanis Club of Waterloo North.
  • Mattes has also served as a trustee of the Waterloo County Law Association.
  • Mattes has volunteered with Renison College, the United Way, the Chamber of Commerce and the Canadian Association of Gift Planners.

The neighbourhood

The Waterloo office is at 24 Dupont Street East, a Queen Anne building that John Letter built in 1901.

Where to find them

24 Dupont Street East, Suite 200, Waterloo, Ontario N2J 2G9 · 519-896-0204

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This listing was generated by AI from public sources in October 2026. It may contain errors, and we can’t guarantee it’s accurate or complete. Before you rely on anything here, verify it on the firm’s own website. Verify licence status in the Law Society of Ontario directory ↗

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