We understand that family law matters can be one of the most difficult experiences to go through. 

At O’Sullivan Legal, we’re the top-rated family law firm in Northern Beaches. You can rely on us for expert guidance, compassionate support, and successful outcomes at every stage of your case.  

Whether you’re navigating a separation, dealing with child custody issues, or handling property settlements, we are committed to helping you achieve the best possible outcome for you and your family. 

You don’t have to go through this alone – trust us to be your steadfast ally during these challenging times. 

What Sets Us Apart?

We’re The Legal Experts

At O’Sullivan Legal, we are proud to be led by our experienced family lawyer Ben O’Sullivan, whose extensive list of qualifications in family law is unmatched. Our Northern Beaches team is composed of dedicated professionals who have handled a wide range of family law matters, ensuring that you receive the highest quality advice and representation no matter the case.

We Focus On The Client

We believe that there’s no one-size-fits-all when it comes to family law cases. That’s why we take the time to understand your specific circumstances and tailor our services to meet your individual needs. Our family law team will ensure that you feel heard, supported, and respected throughout the entire legal process. 

We Offer Amicable & Affordable Resolutions

We are strong advocates for alternative dispute resolution methods such as family mediation and collaborative law without needing to attend Family Court. These methods can help you resolve your issues more efficiently, cost-effectively, and amicably, minimising stress and conflict. Additionally, our services are offered at competitive rates, and we provide flexible billing options to make legal support accessible. 

Learn more about our mediation services. 

We Provide Transparent Communication

Clear and open communication is a cornerstone of our practice. We iron out all the legalese, keeping you informed about the progress of your case and ensuring you understand your legal rights and the options available to you. Additionally, our services are offered at competitive rates, and we provide flexible billing options to make legal support accessible. 

We Get Results 

Our reputation is built on delivering results. We have successfully helped countless clients navigate the complexities of family law, securing favourable outcomes that allow them to move forward with their lives confidently. 

Family Law Services Offered

Separation and Divorce

Harbouring through the end of a marriage can be a daunting and emotional process. At O’Sullivan Legal, we provide comprehensive support to help you through this difficult time. Our services include determining your eligibility for divorce, preparing the necessary paperwork, and representing you in court if needed. Our goal is to simplify the process so you can finalise your separation and move forward with your life. 

Parenting Matters

Ensuring the well-being of your children during and after a separation is paramount. We work tirelessly to help you reach fair and sustainable parenting arrangements that serve the best interests of your children. Whether you’re negotiating custody, visitation rights, or child support, we are here to advocate for your parental rights and the well-being of your children. 

Property Settlement

The division of assets can be one of the most contentious aspects of a separation. Our experienced team will guide you through the property settlement and spousal maintenance process, helping to determine the true value of your assets and advising you on what to pursue during negotiations. We aim to achieve a fair and equitable settlement that allows you to move forward financially secure. 

De Facto Relationships

Separation from a de facto relationship can be complex, particularly when it comes to proving the relationship’s existence and managing shared assets. Our team of accredited family law specialists have extensive experience in handling these cases, providing expert guidance on property division, financial support, and any related parenting matters. 

Relocation and International Family Law

In our increasingly globalised world, family law issues often extend across borders. Whether you’re considering relocating with your children or dealing with international custody disputes, our knowledgeable team can provide the necessary legal support. We understand both domestic and international family law, ensuring that your rights are protected wherever your case may lead. 

Domestic Violence and Restraining Orders

Domestic violence and abuse are serious issues that can significantly impact family law matters. At our legal practice, our compassionate lawyers are dedicated to providing support and legal representation to victims of domestic violence. We assist in obtaining restraining orders and take necessary legal actions to ensure your safety and the safety of your children. 

If you are in immediate danger, please call emergency services at 000 or 1800RESPECT. For urgent legal assistance, contact our office at (02) 8114 4511. 

Frequently Asked Questions

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If I’m involved in a family law matter, do I need a lawyer?

While it is not legally required to have a lawyer, having professional legal representation can significantly improve the outcome of your case. Family law is complicated and emotionally charged, and a lawyer can provide expert guidance, protect your rights, and help navigate the legal system. 

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How much do family lawyers in the Northern Beaches cost?

The cost of hiring a family lawyer can vary depending on the complexity of your case and the services required. At O’Sullivan Legal, we offer competitive rates and flexible billing options to ensure our services are accessible. We provide a clear cost estimate after your initial consultation so you can make an informed decision. Contact us today.  

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Will I have to go to court?

Not all family law matters require court intervention. We are strong advocates for alternative dispute resolution methods, such as mediation and collaborative law, which can help you resolve issues amicably without going to court. However, if court proceedings are necessary, we are experienced litigators ready to represent you effectively. 

Learn more about our mediation services. 

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What are your billing options?

We understand that legal fees can be a concern, which is why we offer flexible billing options to suit your needs. This includes hourly rates, fixed fees for certain services, and payment plans. Our goal is to provide high-quality legal support without causing financial strain. 

Securing Fair Outcomes for Your Family

Family law matters can be overwhelming for the entire family – but it doesn’t have to be.  

Having legal expertise can help you move forward with confidence.  

At O’Sullivan Legal, our dedicated team of experienced family lawyers in Sydney’s Northern Beaches is committed to helping you achieve the best possible outcome for your unique situation.  

From divorce and child custody to property settlements and domestic violence cases, we offer comprehensive legal services tailored to meet your specific needs. 

Make the first move towards resolving your family law challenges with confidence and reliable support. 

Contact us today to schedule your free consultation and start making a positive resolution. Our dedicated team is here to help you at every stage of your journey. 


We make the family law process simple and stress-free. Talk to us today.

O'Sullivan Legal

O’Sullivan Legal is a leading family law firm based in Sydney, Australia. Founded by experienced family lawyer Ben O’Sullivan, our firm provides exceptional legal services to clients facing complex family law matters.


Suite 15, Level 2, 123 Clarence St, Sydney NSW 2000

Level 13, 50 Cavill Avenue, Surfers Paradise QLD 4217 (07) 3167 1702

Suite 47, Level 27, 101 Collins Street, Melbourne Victoria 3000