Business Details
50+ Years
experience
Emergency
services
Your Trusted Legal Partner in Niagara
Sullivan Mahoney has been a cornerstone of legal excellence in Niagara since 1953. Our firm combines over seven decades of experience with a client-first philosophy, delivering pragmatic legal solutions tailored to individual and corporate needs. We pride ourselves on maintaining impeccable service standards while adapting to evolving legal landscapes. Our multidisciplinary team collaborates across practice areas to provide comprehensive counsel, ensuring clients receive holistic legal support. With certified specialists in construction law and recognized leaders in administrative, business, and criminal law, we offer depth of expertise unmatched in the region.Our commitment extends beyond legal matterswe actively contribute to community development through local initiatives. The firm's enduring values of integrity, professionalism, and innovation continue to guide our practice. We maintain strong relationships with tribunals, courts, and regulatory bodies to effectively advocate for clients. Our lawyers hold leadership roles in professional organizations, reflecting our industry authority. Client testimonials consistently highlight our accessibility, responsiveness, and results-driven approach.
Services
Administrative Law
Business Law
Civil Litigation
Construction Law
Criminal Law
Family Law
Real Estate Law
Tax Law
Employment Law
Personal Injury
Details
- Year established: 1953
Highlights and features
- We offer 70+ years of combined legal experience across 12 practice areas
- Our team includes certified specialists in construction law
- We maintain a multidisciplinary approach for comprehensive legal solutions
- Our lawyers hold leadership positions in local legal institutions
- We provide personalized service with regional market expertise
What people say
Expert legal guidance
Responsive service
Deep local knowledge
Professional team
Effective representation
Services
Administrative Law
Our administrative law practice handles municipal, planning, and environmental litigation. We represent clients before tribunals including the Ontario Municipal Board and Environmental Review Tribunal. Our team specializes in property assessment disputes and regulatory compliance matters.
Business Law
We provide comprehensive business law services covering incorporation, mergers and acquisitions, and commercial contracts. Our lawyers advise on corporate governance and tax planning for businesses from startups to established corporations across Niagara.
Civil Litigation
Our civil litigation group handles commercial disputes, contract enforcement, and debt collection matters. We represent clients in court proceedings and alternative dispute resolution processes like mediation and arbitration across Ontario.
Construction Law
As one of Niagara's few certified construction law specialists, we handle bidding disputes, lien claims, and contract negotiations. Our practice includes prompt payment issues and adjudication under Ontario's Construction Act.
Criminal Law
Our criminal law team defends clients facing charges under the Criminal Code and Highway Traffic Act. We provide urgent representation for all levels of criminal offenses in provincial and federal courts.
People
Rocco Rocky Vacca
Partner
Practicing in administrative law, business law, and real estate law with over 25 years of legal experience in Niagara.
Adam Patchet
Partner
Certified specialist in tax law with expertise in corporate tax planning and dispute resolution.
Diana M. Continenza
Partner
Focuses on family law and personal injury litigation with a decade of courtroom experience.
Nadia N. Ahmed
Associate
Recent addition to our civil litigation team with specialization in advocacy and dispute resolution.
Rama Y. Appadoo
Associate
Newly called Ontario Bar member supporting our litigation and advocacy practice areas.
Questions
What areas of law does Sullivan Mahoney LLP specialize in?
We practice in 12 core areas including administrative law, business law, construction law, criminal law, family law, and real estate law.
How long has Sullivan Mahoney been in business?
Since 1953, providing legal services to Niagara residents and businesses for over seven decades.
Do you offer emergency legal services?
Yes, our criminal law team provides urgent representation with after-hours availability.
What makes Sullivan Mahoney different from other law firms?
We combine multidisciplinary expertise with local knowledge and a client-focused approach to legal representation.
Are your lawyers certified specialists?
Yes, we have certified specialists in construction law and recognized experts in multiple practice areas.
Do you serve clients outside Niagara?
While based in Niagara, we represent clients across Ontario through our extensive legal network.
