About Joseph Sidiropoulos & Associates

Joseph Sidiropoulos & Associates is a Toronto personal injury firm that practices exclusively in motor vehicle, motorcycle, pedestrian, and bicycle accident litigation, including cases involving traumatic and acquired brain injury. The firm is based in the Commodore Building at 317 Adelaide St. W., a ten storey office building in Toronto's Fashion District. It works on a contingency fee basis and does not charge clients unless it wins their case, an arrangement the firm says is meant to keep legal costs from adding to the financial strain an accident can already cause a family.

The firm is led by senior partner Joseph Sidiropoulos, who was born and raised in Toronto. Sidiropoulos holds a law degree from Osgoode Hall Law School, a Master's degree in International Political Economy focused on American foreign policy, and a double Honours Bachelor's degree in Media Studies and Political Science from York University, and was called to the Bar of Ontario in 2006. Before concentrating on personal injury law, Sidiropoulos practiced corporate commercial litigation for several years. Outside the practice, Sidiropoulos's interests include archeology, history, economics, travel, and collecting rare books, along with hiking, cycling, and track and field.

Practice areas

Good to know

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

Fees & payment

A shield with gold coins, a dollar sign and a checkmark sealContingencyA clipboard with a speech bubble and a no-charge dollar coinFree consultation

The neighbourhood

The firm's office sits in the Commodore Building at 317 Adelaide St. W., a ten storey structure completed in 1929 and designed by architect Benjamin Brown, known for its Art Deco detailing, large metal framed windows, and maple floors on each level. The building stands in what was once Toronto's Garment District, now called the Fashion District, an area of early twentieth century textile factories and warehouses along Adelaide Street West and Spadina Avenue that has since been redeveloped into offices, retail, and live and work space while keeping much of its original architecture.

Frequently asked questions

I was hurt in a car accident in Toronto. Can Joseph Sidiropoulos & Associates take my case?
Yes. The firm's practice is limited to personal injury litigation, and catastrophic motor vehicle accident claims are one of its stated areas of work.
Does the firm represent motorcyclists injured in a crash?
Yes, motorcycle accident litigation is listed among the firm's areas of practice.
I was hit by a car while walking or cycling. Does the firm handle pedestrian and bicycle accident claims?
Yes. Pedestrian and bicycle accident cases are part of the firm's personal injury practice.
My injury involves a brain injury. Does the firm have experience with that?
The firm's areas of practice include traumatic brain injury and acquired brain injury litigation arising from motor vehicle accidents.
Will I have to pay legal fees upfront?
No. The firm works on a contingency fee basis and states that it does not charge fees unless it is successful in obtaining an award for the client.
Who runs the firm and where is it located?
The firm is led by senior partner Joseph Sidiropoulos, called to the Bar of Ontario in 2006, and is based at 317 Adelaide St. W., Suite 1001, in downtown Toronto.

Where to find them

317 Adelaide St. W. Suite 1001, Toronto, ON, M5V 1P9 · 416-979-9771

Similar firms in City of Toronto

Crangle Law

1 lawyer

Crangle Law is a downtown Toronto litigation practice led by Aaron Crangle, who was called to the Ontario Bar in February 2000. The firm handles civil, employment, and commercial litigation, along with personal injury…

Employment & Labour LawEmployment & Labour LawCivil Litigation & Dispute ResolutionCivil Litigation & Dispute ResolutionPersonal InjuryPersonal InjuryAdministrative & Regulatory LawAdministrative & Regulatory Law

Garro Law Group

1 lawyer

Garro Law Group is an Ottawa-area firm founded and led by lawyer Agron Garro, with offices in Kanata and Toronto. The firm offers a broad range of services including immigration, personal injury, family law, criminal …

Immigration LawImmigration LawPersonal InjuryPersonal InjuryFamily LawFamily LawCriminal DefenceCriminal Defence

Parsons Accident Law, formerly Reznick, Parsons, Taberner, is a Toronto personal injury firm led by Diane Parsons that has represented injured people and their families for over 30 years. The firm has appeared before …

Personal InjuryPersonal Injury

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