Our lawyers
Biography
Mario Paul-Hus has dedicated his professional practice to municipal law. He has been involved in numerous cases for several cities and municipalities in Quebec. He possesses sought-after experience in all matters falling under municipal jurisdiction and has worked on many real estate development projects.
His knowledge of the municipal world is a significant asset for the municipalities he represents, as well as for the firm's clients who have dealings with municipalities. Faced with complex problems, he is adept at formulating innovative proposals that take into account the significant constraints imposed by municipal laws and finding solutions that allow his clients to move forward.
Mr. Paul-Hus is a certified ethics advisor and has developed cutting-edge expertise in municipal contracts. He also litigates cases involving municipalities before the courts.
Mario Paul-Hus
Senior partner
Municipal and administrative law | Condominium Law | Labor Law
Contact
514 954 0440 I ext. 11
Patrice Hockenhull
Senior partner
Litigation | Municipal Law | Expropriation | Real Estate Law
Contact
514 954 0440 I ext. 25
Biography
Mr. Hockenhull was called to the Quebec Bar in 2014. He holds a Bachelor of Laws degree from the University of Montreal, where he was named to the Faculty of Law's list of outstanding students for his academic achievements. Mr. Hockenhull also holds a Juris Doctor degree from the prestigious Osgoode Hall Law School. During his university studies, he received several scholarships for academic excellence, including the entrance scholarship awarded to the top college students admitted to the Faculty of Law.
Mr. Hockenhull is an excellent litigator specializing in municipal and civil litigation, advising clients on all matters of municipal law. He also has in-depth knowledge of civil liability issues, having represented insurers in numerous cases. He has extensive experience representing clients before the courts, having pleaded before trial courts and the Quebec Court of Appeal. He has also appeared before several Quebec administrative tribunals. Mr. Hockenhull distinguishes himself through his keen understanding of legal issues, his dedication to his clients' cases, and his commitment to finding the best possible solution for them in the face of a legal problem or dispute.
Mr. Hockenhull joined Municonseil after beginning his career in boutique firms representing real estate developers and then joining a firm specializing in municipal law that represented cities and municipalities in Quebec.
Pierre Paquin
Lawyer
Municipal Law | Administrative Law | Litigation
Contact
514 954 0440 | ext. 24
Biography
Mr. Paquin has over 38 years of experience in litigation before all courts, including the High Courts.
municipal authorities, various administrative tribunals, the Court of Quebec, the Federal Court, the Superior Court,
the Quebec Court of Appeal and finally, the Supreme Court of Canada.
Me also made representations before the National Assembly of Quebec, in which
presenting private draft legislation. He also pleaded in the context of a rogatory commission to
Brussels in Belgium.
Mr. Paquin holds a Bachelor of Laws degree from the University of Montreal. He is an Officer of the Canadian Armed Forces.
Canadian Armed Forces, having studied at the Royal Military College of St-Jean-sur-Richelieu
Over the years, Mr. Paquin has developed solid experience as a litigator. Specialist in
In municipal law and civil litigation, he advises both municipal corporations and citizens in their
relations with the latter.
Louis Beauregard
Retired lawyer
Municipal | Urban planning | Expropriation | Municipal taxation
Contact
514 954 0440 | Extension 22
Biography
Mr. Louis Beauregard, retired lawyer, joined Municonseil in 2024, after having directed the boutique firm Beauregard Avocats, working primarily in the fields of municipal law and real estate law. When he was a prosecutor, he acted as mediator and ethics advisor, and defended clients in urban planning and zoning cases, expropriation and municipal taxation matters, and other aspects of municipal law and public real estate.
Mr. Beauregard has provided legal and strategic services to some of Canada's most important retailers and property owners, as well as to public bodies and individuals dealing with municipal administrations. He has also been referred cases by attorneys who were in conflict of interest situations and has also acted as counsel for other lawyers who did not have the necessary expertise to handle cases in municipal law, urban planning, expropriation, or municipal taxation.
He has acted as a strategic advisor, negotiator with municipal administrations, and has pleaded cases before the Supreme Court, the Quebec Court of Appeal, the Superior Court, the Administrative Tribunal of Quebec, several specialized administrative tribunals, and also before municipal courts.
Charles Unterberg
Lawyer
Disputes | Real Estate Law | Commercial Leases | Municipal Law | Latent Defects
Contact
Biography
Mr. Charles Unterberg holds a Bachelor of Business Administration with a concentration in Finance from UQAM, obtained in 1993, as well as a Bachelor of Laws from the Université de Montréal, obtained in 2003. He was admitted to the Quebec Bar in 2004.
In 2005, Mr. Unterberg joined Mr. Daniel St-Pierre and Ms. Hélène Maillette, now a judge of the Court of Québec, with whom he developed his expertise in civil and commercial litigation.
Representing primarily small and medium-sized enterprises, which make up the predominant portion of his clientele, he acts as external legal counsel and represents clients in disputes involving commercial leases, contracts, debt collection, and labour relations, as well as in areas such as bankruptcy, mortgage law, and liquor permits.
Mr. Unterberg also represents individuals in matters involving labour law litigation, bankruptcy, divided co-ownership (condominiums), and latent defects.
Mr. Unterberg distinguishes himself through his ability to find creative solutions to his clients’ problems, whether through judicial proceedings, direct negotiation, or settlement conferences. He pays meticulous attention to minimizing inconvenience and costs, both for plaintiffs and defendants in litigation.
William Rossignol
Lawyer
Litigation | Real Estate Law | Commercial Leases | Municipal Law | Latent Defects
Contact
514 954 0440 | Extension 23
Biography
After studying political science, Mr. Rossignol obtained a Bachelor of Laws degree from the University of Sherbrooke in 2019, and became a member of the Quebec Bar in 2020.
William Rossignol practices primarily in litigation at the firm, specializing in civil and commercial law, as well as municipal and administrative law. He regularly pleads before the Court of Quebec, the Superior Court, municipal courts, and various administrative tribunals.
Before joining Municonseil, Mr. Rossignol practiced in particular within a boutique firm specializing in municipal law, and he acted as a prosecutor in Municipal Court.
In connection with his practice, Mr. Rossignol serves a clientele comprised of cities and municipalities, as well as small and medium-sized businesses. He acts both as a strategic advisor to his clients and as counsel for representation before the courts.
Catherine Laperrière
Lawyer
Municipal | Urban Planning | Litigation
Contact
514 954 0440 I ext. 27
Biography
Catherine Laperrière was admitted to the Barreau du Québec in 2023 and holds a joint degree in civil law and common law from Université McGill. She was named to the Dean’s Honour List, ranking in the top 10% of her cohort, while also volunteering with a legal clinic serving individuals experiencing homelessness.
Ms. Laperrière then served as a law clerk at the Cour d'appel fédérale, where she worked closely with the Honourable Sylvie E. Roussel on significant cases. She later acted as legal counsel in statutory interpretation and subsequently as a civil litigator at the ministère de la Justice du Canada. In these roles, she developed strong expertise across various areas of law and managed litigation files, primarily in administrative law.
Drawing on these diverse experiences, she is committed to providing pragmatic solutions to her clients’ challenges and takes particular interest in tackling complex legal issu
Laurence Casavant-Nault
Lawyer
Municipal Law | Administrative Law | Litigation
Contact
514 954 0440 | ext. 16
Biography
Me Casavant-Nault holds a law degree from the Université de Montréal, where she graduated on the Faculty Dean’s Honour List. She was admitted to the Quebec Bar in 2025 after completing her articling placement at an international law firm.
Wishing to pursue her passion for public law, Me Casavant-Nault joined the Municonseil team to begin her practice in litigation.
Guillaume Rousseau
Partner
Municipal Law | Land Use & Planning | Litigation
Contact
Biography
Guillaume Rousseau has completed his Law licence at the Université de Sherbrooke, followed by a Comparative Law master's with a major in human rights and cultural diversity at McGill University. He articled at Fasken Martineau where he also practiced municipal and urban planning law.
Me Rousseau's work experience was completed at the Québec Justice Department and at the New Brunswick Human Rights Commission. Recently, he acted as advisor to the Québec National Assembly, particularly during the consultations leading to the revision of the Code of Civil Procedure. His post-graduate work, co-tutored by the Université de Sherbrooke and the Université Paris I Panthéon-Sorbonne led to a Ph.D. thesis in the Fall of 2012 and a Ph.D. degree jointly granted by the two universities. The same year saw Me Rousseau's nomination as professor at the Law faculty of the Université de Sherbrooke.
