About Matteslaw Legal Professional Corporation

Matteslaw Legal Professional Corporation is a solo practice led by Joe Mattes, a barrister, solicitor and notary public in Waterloo, Ontario. The office sits at 24 Dupont Street East, in Uptown Waterloo, and the work centres on corporate and commercial law. That runs from incorporations and reorganizations through business acquisitions and divestitures, commercial leasing, and secured transactions, and it extends into wills, estate administration, and business succession planning. A recurring thread is technology and trademark work, which the firm's own materials have emphasized for years.

Joe Mattes earned a Bachelor of Arts from the University of Toronto in 1980 and a law degree from Western University in 1983, then was called to the Ontario bar in 1985. Before opening an independent practice, the founder practised in Toronto and was a partner at a large Waterloo firm. Since 1996 the practice has published a newsletter, Technology Businesses and the Law, along with articles on business and estate topics. Matteslaw serves mostly business and professional clients, and it's accepting new work by referral only.

Milestones & recognition

  • Joe Mattes was called to the Ontario bar in 1985, after a Bachelor of Arts from the University of Toronto in 1980 and a law degree from Western University in 1983.
  • Before opening an independent practice, the founder practised in Toronto and was a partner at a large Waterloo firm.
  • The practice has published a newsletter, Technology Businesses and the Law, since 1996, along with articles on business law and estate planning.
  • The founder is a past trustee of the Waterloo Law Association.

In the community

  • Volunteer involvement with the Heart and Stroke Foundation of Ontario.
  • Support for the United Way of Kitchener-Waterloo.
  • Membership in the local Chamber of Commerce and the Kiwanis Club.

Good to know

A person using a wheelchairWheelchair accessibleA calendar with a checkmark beside a clockBy appointment

The neighbourhood

The office is at 24 Dupont Street East, a short street just off King Street North that the firm calls the heart of Uptown Waterloo. Uptown is the city's older commercial core, a walkable run of storefronts, restaurants, and professional offices in the Business Improvement Area rather than a highway plaza. It's also a stone's throw from the technology and startup economy that Waterloo is known for, which lines up with a practice that has long handled incorporations, reorganizations, and technology and trademark matters. For an owner coming in to sign a lease, close a sale, or set up a succession plan, it's a central and easy place to reach.

Frequently asked questions

What kind of law does Matteslaw handle?
The practice focuses on corporate and commercial law, including incorporations, reorganizations, business acquisitions and divestitures, commercial leasing, and secured transactions. It also handles wills, estate administration, and business succession planning, and Joe Mattes is a notary public.
Is Matteslaw taking on new clients?
The firm accepts new clients by referral only, and it works mainly with business and professional clients across Waterloo Region.
Can Matteslaw help me buy or sell a business?
Yes. Business acquisitions and divestitures are a core part of the corporate practice, along with the reorganizations, agreements, and secured transactions that tend to go with a purchase or a sale.
Does Matteslaw prepare wills and handle estates?
Yes. The practice covers wills, estate administration, and business succession planning, which often overlap for owners who want to plan how a company passes on.
Does the firm work on technology and trademark matters?
Yes. The practice has emphasized technology transactions and trademark work for years, and it has published a newsletter on technology businesses and the law since 1996.
Where is the office and how do I reach it?
The office is at 24 Dupont Street East, Suite 200, in Uptown Waterloo. You can reach it by phone at 519-896-0204 or by email at joe@matteslaw.com.

Where to find them

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

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