Cossette Dolan Avocats is a boutique firm in Longueuil offering advice and litigation in areas including cooperative law, business law (including start-ups), labour relations, housing law and construction and real estate law. Its clients include non-profit organizations, housing cooperatives, businesses and individuals. The firm favours video-conference meetings and works remotely on Fridays.

Good to know

A person using a wheelchairWheelchair accessibleA laptop showing a video callVirtual appointmentsAn office interior with a desk and chairsIn-person services

This firm’s lawyers at a glance

Called to the bar
1982 · median 44 years in practice 1 of 2 lawyers
Languages on the roster
French

Where to find them

110, rue de la Barre, bureau 225, Longueuil, Quebec J4K 1A3, Canada · 514-842-1771

Similar firms in Longueuil

DAC Avocats

3 lawyers

DAC Avocats is a law firm in Longueuil, Quebec. It practices civil law, including real estate, hidden defects, and succession matters, along with business law and arbitration, and describes itself as a firm serving cl…

Business & Corporate LawBusiness & Corporate LawReal Estate LawReal Estate LawConstruction LawConstruction LawCivil Litigation & Dispute ResolutionCivil Litigation & Dispute Resolution

Lacasse Avocats Inc. is a law firm on Montreal's South Shore offering services in construction, family, labour, business, and tax law. The firm was founded by Jean-Guy Lacasse and has since grown to include additional…

Construction LawConstruction LawFamily LawFamily LawEmployment & Labour LawEmployment & Labour LawBusiness & Corporate LawBusiness & Corporate Law

Dunton Rainville

138 lawyers · Est. 1954

Dunton Rainville is a full-service Quebec law and notarial firm founded in 1954, with roughly 300 staff including about 135 avocats and notaires. It has offices in Montréal, Laval, Saint-Hubert (Longueuil), Joliette, …

Business & Corporate LawBusiness & Corporate LawTax LawTax LawReal Estate LawReal Estate LawConstruction LawConstruction Law

Listing compiled from the firm’s public website in July 2026. Verify licence status in the Barreau du Québec directory ↗