Preeminence in Matrimonial & Family Law
Representing High-Net-Worth Clients Across New York
Matrimonial Law Services That Address the Full Picture
Every Asset. Every Concern. Fully Accounted For.
Our team handles every facet of matrimonial law, from pre-divorce strategy and filings to business valuation, equitable distribution, and post-judgment modification. We focus exclusively on family law—no general practice distractions, no watered-down knowledge.
Whether the concern is the future of a closely held business or the structuring of child custody in a high-conflict environment, our attorneys approach each case with clarity, confidentiality, and courtroom readiness.
Sophisticated Representation for Complex Divorce Matters
Skilled & Compassionate Advocacy for High-Stakes Divorce and Litigation
For clients with significant assets, business holdings, or complex financial portfolios, divorce is never simple. Gassman Baiamonte Gruner, PC is a matrimonial and family law firm known for handling high-net-worth divorces with discretion, precision, and strategic advocacy. We regularly represent business owners, executives, and professionals facing litigation that requires clarity and control—not just legal paperwork.
Our attorneys are not only negotiators but trial-tested litigators. We prepare every case as if it will go to trial—because favorable outcomes often depend on our ability to try them well.
High Net Worth Divorce
Sophisticated counsel for individuals with substantial income, complex investments, or business ownership. We protect your interests at every stage of the divorce process.
Marital Agreements
We draft and review prenuptial and postnuptial agreements with clarity, strategy, and enforceability—especially when substantial assets or family businesses are involved.
Equitable Distribution
When the division of assets matters, we bring financial fluency to the table. From real estate to restricted stock, our team ensures fair, fact-based distribution.
Child Custody & Support
We represent parents in high-conflict custody and support matters with a focus on child-centered outcomes, lifestyle preservation, and legally sound parenting plans.
Divorce Appeals & Modifications
Not every judgment is final. We pursue or defend appeals, enforce court orders, and petition for modifications when life changes after divorce.
When Litigation Is Unavoidable, We Are Ready
Strategic Trial Counsel for High-End Matrimonial Cases
Some divorces require litigation from the outset. Others begin with negotiations but eventually turn to trial. In either case, our attorneys have the courtroom experience that changes settlement dynamics.
Stephen Gassman’s reputation as one of New York’s top matrimonial trial lawyers leads opposing counsel to rethink their approach. And when a case must be appealed, we don’t hand it off—we manage complex appeals in-house, keeping continuity and legal depth on your side.
Serving Nassau & Suffolk County, and the Greater New York Area
Deep Local Experience with Metro Reach
From Garden City to the courthouses of Mineola, Roslyn, Manhasset, Great Neck, Suffolk, the 5 Boroughs of NYC, Westchester and beyond, our practice is deeply rooted in Nassau County. Our attorneys are active in local and state bar associations, and our relationships across the legal community help us stay ahead of procedural shifts and judicial expectations.
Whether your matter is private, contested, or unusually complex, Gassman Baiamonte Gruner, PC brings local credibility and big-case capability to every client we represent.
What Our Clients Say
Alaina A.
“I can not say enough amazing things about everyone who works at this firm. My husband was recently in an accident and from the moment I called they were there for me. They answered every question I had and kept us informed in every way. I would 100% recommend them to anyone who is in need of an attorney. You guys are fantastic!!"
Kay T.
"There are so many things that I could say about my experience with this firm. My initial interaction was very pleasant and informative. I needed help with a traffic violation and Christopher was able to help me out of a bad situation with great results!! The overall value for the professional job they did was fantastic! Christopher really knows his stuff and I highly recommend his services if you find yourself in need of them."
Tilly R.
"Chris and Trisha and amazing!! Helped me on the spot and got me handled with all my medical appointments after a very stressful and painful accident! I’m so glad I was referred to them"
Start with a Consultation That Respects Your Time and Priorities
Schedule a Confidential Consultation
We understand that reaching out to a law firm is rarely easy. Our consultations are focused, informative, and private. You’ll speak directly with an attorney—not a sales coordinator—about your situation, your risks, and your options. We’ll clarify what to expect in the legal process and how we would approach your case.
Your time is valuable. So is your future. Schedule your consultation today and speak with a team that understands both.