Atty. Marc J. Grenier
Marc J. Grenier is a seasoned attorney with over three decades of experience practicing law in the State of Connecticut.
Civil Litigation & More Attorney · Serving Fairfield, CT · 35+ Years Experience
Profile Summary
About Marc J. Grenier at a Glance
Marc J. Grenier is an Attorney based in Fairfield, Connecticut, practicing at Russo & Rizio, LLC. They have 35+ years of legal experience, licensed to practice since 1991. Their practice focuses on residential, probate, family law, real estate, and zoning. Admitted to practice in Connecticut (1991), U.S. District Court, District of Connecticut (1992), and U.S. Supreme Court (1996). Educated at New England School of Law (J.D., 1991) and Providence College (B.S., 1988). Recognitions include AV Preeminent. Serves clients in Fairfield, CT and the surrounding metropolitan area.
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About Marc J. Grenier
- Marc J. Grenier is a seasoned attorney with over three decades of experience practicing law in the State of Connecticut
- Marc’s practice encompasses a broad range of legal areas, including civil litigation, landlord-tenant disputes, commercial and residential real estate, matrimonial law, probate litigation, estate administration/planning, zoning, and municipal law
- His legal acumen and dedication to client advocacy have earned him a reputation for excellence within both the legal community and the communities he serves
- He has also been appointed by a number of Connecticut Probate Courts to serve as a Trustee, Conservator, Conservator and Guardian for a wide range of probate matters
- With 34 years in practice, Marc Grenier is an expert legal counsel as well as a fixture in the civic and legal communities of Fairfield County
- Locally born and raised, and having achieved hundreds of positive results for clients, Marc handles each case with compassion and common sense, strategically providing practical counsel and attention-to-detail in order to optimize the outcome
- He has been recognized by peers as performing at the highest level of his profession, rated ‘exceptional’ in legal knowledge, communication skills and ethical standards
- He is also widely respected and awarded for his dedicated service and leadership across a broad range of civic and legal organizations
- Marc earned his Juris Doctor, cum laude, from the New England School of Law in Boston in 1991 and holds a Bachelor of Science in Finance, cum laude, from Providence College (1988)
- He was admitted to the Connecticut Bar in 1991, the Federal District Court of Connecticut in 1992, and the United States Supreme Court in 1996
- In addition to his legal practice, Marc serves as a Fact Finder/Arbitrator, Attorney Trial Referee, and Special Master for the Connecticut Superior Court in both the Civil and Housing Sessions since 2002, and the Family Division since 2011
- Marc has been deeply involved in professional and civic leadership throughout his career
- He is a past President of the Fairfield County Bar Association (2018–2019), having served on its Executive Board from 2014 to 2018, and held roles as Vice President, Secretary, and Treasurer
- He has also served on the Bar Association’s Board of Directors across multiple terms
- His community engagement is equally distinguished
- Marc was the Chairman of the Greater Norwalk Chamber of Commerce (2017-2019), where he previously served as Vice Chairman, Treasurer, and Executive Board Member
- He chaired the Norwalk Leadership Institute and the Chamber’s Finance Committee, and has been active on the Board of Directors from 2008-present
- Marc’s additional civic involvement includes currently serving on the Board of Directors for the Wall Street Neighborhood Association (WSNA), (2022-present), and Board of Directors of Elder House Adult Day Center in Norwalk, (2024-present)
- He also has served as Treasurer of the Norwalk Senior Center (2013–2017), President and Vice President of the Norwalk Catholic Club, and Chairman of the St. Joseph’s School Advisory Board in Danbury from 2004 to 2011
- He also held leadership roles with the Mid-Fairfield County American Red Cross, including as Chairperson of its Annual Golf & Tennis Tournament and as a member of its Board of Directors
- He also served on the Finance Council of St. Joseph’s Church in Danbury
- Marc is a member of the Connecticut Bar Association, Fairfield County Bar Association, New England Land Title Association, and Knights of Columbus
- He is a Martindale-Hubbell AV-rated attorney
- He resides in Danbury, Connecticut with his wife, Jeanne, and has two grown children, Daniel and Emily
Practice Areas Explained
Marc J. Grenier's Areas of Legal Practice
Each practice area below reflects the types of cases Marc J. Grenier handles, with a practical overview of what that area of law involves and how it may apply to your situation in Fairfield.
Residential Real Estate in Fairfield
Marc J. Grenier is one of 9,272 residential attorneys indexed nationally. Browse residential attorneys in Connecticut →
Probate in Fairfield
Marc J. Grenier is one of 127,041 probate attorneys indexed nationally. Browse probate attorneys in Connecticut →
Family Law in Fairfield
Family law attorneys handle divorce, child custody, child support, adoption, prenups, and protective orders. Find verified family lawyers near you.
Marc J. Grenier is one of 185,688 family law attorneys indexed nationally. Browse family law attorneys in Connecticut →
Real Estate Law in Fairfield
Real estate attorneys handle home purchases, sales, commercial transactions, title disputes, and landlord-tenant matters.
Marc J. Grenier is one of 313,729 real estate attorneys indexed nationally. Browse real estate attorneys in Connecticut →
Land Use & Zoning in Fairfield
Marc J. Grenier is one of 39,875 zoning attorneys indexed nationally. Browse zoning attorneys in Connecticut →
Jurisdictional Context
Why Local Counsel Matters in Fairfield
Practicing law in Connecticut. Legal matters in Connecticut are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Fairfield are typically filed in the local municipal court or the appropriate Connecticut state district court, depending on subject matter and amount in controversy. An attorney licensed in Connecticut brings working knowledge of local procedural deadlines, judicial practices in this venue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Connecticut courts without local counsel or pro hac vice admission.
Fairfield Courts and Legal Process
Choosing a Fairfield-based attorney means your counsel already knows the local docketing timelines, preferred filing formats, and how individual judges typically rule on procedural motions — details that only come from practicing in this jurisdiction day after day. That local familiarity can translate to better strategy, faster filings, and fewer costly surprises.
Looking for additional Connecticut attorneys? Browse all attorneys in Fairfield or all attorneys in Connecticut.
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Professional Profile
Why Clients in Fairfield Choose Marc J. Grenier
Selecting an attorney is one of the most consequential decisions you can make when a legal matter arises. Below are the core qualities that distinguish Marc J. Grenier's practice in the field of residential, probate, family law, real estate, and zoning.
Decade-Tested Legal Experience
Marc J. Grenier brings 35+ years of hands-on legal practice — enough to have navigated the recurring fact patterns, procedural traps, and negotiation dynamics that shape case outcomes.
Multi-State Bar Admission
Licensed in Connecticut, U.S. District Court, District of Connecticut, and U.S. Supreme Court, Marc J. Grenier can represent clients in cases that span state lines or require counsel in multiple jurisdictions.
Broad Practice Area Coverage
Covering residential, probate, and family law, Marc J. Grenier can address the full spectrum of a client's legal needs without requiring referrals to separate specialists for each issue.
Local Presence in Fairfield
A Fairfield-based practice means Marc J. Grenier attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.
Case Types
Common Legal Issues Marc J. Grenier Handles in Fairfield
Below is a representative sample of the types of matters Marc J. Grenier has experience with under Connecticut law. If your situation involves one of these case categories, this attorney may be well positioned to help you understand your options.
This list is illustrative, not exhaustive. Contact Marc J. Grenier directly to discuss the specifics of your situation.
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How People Find Marc J. Grenier Online
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Marc J. Grenier's Practice Areas & Specializations
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