About Sylvia S.
Sylvia S. Costantino practices family law across New Jersey and New York. She handles the kinds of disputes that turn on life changes: divorce, child custody, support and related family court matters. Her work touches both negotiation and courtroom appearances.
Costantino built her practice by representing individuals at each stage of family law proceedings. She appears before municipal and state family courts in both jurisdictions and prepares the filings those courts require. Her work includes drafting settlement agreements, arguing temporary relief applications and managing discovery in contested cases. She combines courtroom readiness with attention to the paperwork that often decides outcomes.
Outside individual casework, Costantino maintains a presence in the local legal community. As of 2026 she serves on the Family Law Committee of the Monmouth County Bar Association. That role brings her into regular conversations with fellow practitioners and judges about evolving practice issues and courtroom procedure. Participation in the committee keeps her connected to developments in local family law practice.
Clients find her in mediation rooms as often as in court. She approaches mediations as practical problem-solving sessions. When cases cannot settle, she pursues trial preparation methodically. Costantino manages case files, prepares witnesses and marshals financial evidence where support and property issues are involved. Her clients range from people navigating uncontested splits to those facing more complex custody disputes.
Costantino balances casework with ongoing professional activity in both New Jersey and New York. She is admitted to practice in both states and uses that dual admission to advise clients whose lives cross state lines. In daily practice she focuses on the legal and procedural steps that move family law matters forward, whether through settlement or litigation. Her current practice concentrates on family law matters in New Jersey and New York.
