The Garden City Center Building
100 Quentin Roosevelt Boulevard
Garden City, NY 11530

A Premier Divorce And Family Law Firm.


A Premier Divorce And Family Law Firm.


Family Law

Family law is an extremely emotional practice area and encompasses a wide variety of issues.

Long Island's Premier Divorce and Family Law Attorneys

If you are looking at our website, you may be going through some very tough times. You may have major, immediate concerns and are ready to proceed, or perhaps are in an early phase of the decision-making process. We get it! Our team is here to help you un-complicate your life when you need it the most. We do more than represent; we explain and educate about the law and the options along the way. We work as a team with each client all of the time. There are no exceptions.

It is simply no secret that Family and Divorce Law are very personal and emotional subjects that can be difficult for families to navigate. After all, it often means major changes in the dynamics and finances of the home. It can even mean litigating against each other in court. This very truth is the reason why most attorneys elect not to practice any of these areas, but we embrace the challenges and handle them all. There are few, if any, other law firms on Long Island that exclusively handles what we handle and only what we handle.

Finding a law firm is easy. The real challenge is finding the right group of professionals who can provide representation that’s thorough, effective, and fair during the entire process. Often, a case is not simply determined by how bright or forceful the lawyer may be, but by how much respect they have within the courts and with other lawyers. Our firm has a retired Family Law Judge on staff. Our attorneys are in court to interact with those within the system on a daily basis. We regularly represent people who work within the Court system when they face their own personal legal issues. Again, these three areas are the only types of law that we practice, and we do it every single day. We represent every type of person imaginable from ultra-high net worth to those on a shoe-string budget, fathers and mothers, young and not so young, professionals and stay-at-home parents, and the list goes on. We handle simple cases that settle quickly, as well as cases that ranked as some of the longest litigated. If within our practice areas, we have done it successfully before and will do it successfully again for many years to come.

The Law Offices of Seidner & Associates, PC. understands the intimacy and complications associated with family matters. Our committed attorneys and staff will work to ensure your needs are met. Whether you are facing a divorce, a child custody dispute, or orders of protection, you need a law firm that truly cares and has a proven track record of success. We invite you to review our testimonials from actual former clients. Many came to our firm from other law firms and express the difference the change made in their lives. Most clients do start with us and then finish with us. All of our reviews are real, and we never engage in any of the practices that might artificially enhance our appearance to the public. The positive reviews on Google, Super Lawyers, Avvo, and, for example, were all submitted by former clients, and we hope that you will not only look at the rating but read the words.

Please contact us to experience our style of legal practice in the areas of Family and Divorce Law. We think you will see we really are different.

What Our Clients Say

It seems we can't find what you're looking for.


Nassau Lawyer
law practice magazine
New York Post


nys bar association
nassau county long island bar association - logo - Family Court Lawyers
american bar association

The Law Offices of Seidner & Associates, PC

Principal & Senior Attorney

Matthew S. Seidner, Esq - Seidner Law - Family Law Lawyers

Latest Blog


Long Island Divorce Lawyer on High Net Worth Divorces

Some couples, when divorcing, have a substantial amount of assets that need to be divided equitably. Depending on what specific …

Read More

How to Help Kids Through a Divorce

The decision to end a marriage is never an easy one. But it is often made doubly tough when children …

Read More
Grandparents Rights

What are Grandparents Rights in New York?

When a couple separates, it is not just the parents and child that are impacted. Other extended family members such …

Read More

Visitation Laws in New York

In a perfect world, parents who are separated would be able to work out the details of visitation with the …

Read More

After successfully litigating a change in custody in favor of the father, our client was awarded hundreds of thousands of dollars in legal fee reimbursement as required in the separation agreement in the event either party violated the agreement.

Successfully argued to impute income to a nonearning spouse based on her potential earning capacity and proofs of exorbitant spending and money gifted by relatives and friends.

The Firm successfully argued against opposing counsel’s claim that he was entitled a decedent’s medical and financial records when the underlying lawsuit was regarding an alleged breach of fiduciary responsibility.

We obtained a child support order on behalf of our client despite the opposing party claiming that he is unemployed.

Our office successfully defended against a baseless motion to renew and reargue which sought the reversal of a denial of a pendente lite award.

In highly contentious matrimonial matter, where Defendant was believing that she was doing poorly in the case, her counsels attempted to obtain a dismissal of the action, enormous attorneys fees, and other relief.  Our client opposed.  Court ruled entirely in our client’s favor, entirely against the Defendant, and awarded our law firm several thousand dollars

The firm, representing a guardian/attorney, filed for partial summary judgment to declare assets of a ward to be separate property after opposing counsel refused to agree in context of contentious matrimonial matter in Nassau Supreme Court.  Court ruled in favor of the firm and declared partial summary judgment of separate property.

Accomplishments 20 Successfully negotiated and settled a complex divorce matter where the parties agreed to joint residential custody and father agreed to pay child support as he was the more-monied spouse as compared to our client.

Scroll to Top