Under the Family Law Act 1975, you can be legally separated even if you continue living under the same roof. However, if you later apply for divorce, you may need to prove that the separation genuinely occurred.
This article explains what legally counts as separation in NSW, how separation under one roof works, and what evidence the court considers.
Our divorce lawyers in Sydney regularly assist clients navigating exactly this situation, including those unsure when their separation period legally began.
Legal Separation Requirements in NSW
Australia operates under a no-fault divorce system. This means the court does not consider who caused the relationship breakdown. Instead, the only ground for divorce is that the marriage has broken down irretrievably.
To prove this, you must show:
- You have been separated for at least 12 months, and
- There is no reasonable likelihood of reconciliation.
Importantly, separation is not just about physical distance. It is about the breakdown of the marital relationship.
For a clear explanation of how the 12-month period is calculated in your circumstances, speak with our family lawyers in Sydney, Melbourne, or Parramatta.
What Does “Separation” Mean?
- One or both parties form the intention to end the relationship, and
- That intention is communicated to the other party, and
- The couple acts in a way that is consistent with the end of the relationship.
- This means you can be separated even if you:
- Still live in the same property
- Continue sharing some household responsibilities
- Remain financially connected in certain ways
The key issue is whether the marital relationship has ended.
What Is Separation Under One Roof?
Separation under one roof refers to a situation where a couple has ended their relationship but continues living in the same home.
This can happen for many reasons, including:
- Financial pressures
- Parenting arrangements
- Lease or mortgage obligations
- Waiting for property settlement
- Cultural or personal reasons
The Federal Circuit and Family Court of Australia recognise that separation can occur even if parties remain under the same roof.
If your separation involves shared children, our child custody lawyers can advise on parenting arrangements that apply while you remain in the same property.
How Do You Prove Separation Under One Roof?
If you apply for divorce and any part of the 12-month separation period was during the time you still lived together, you must provide additional evidence. The court requires:
- An affidavit from you
- An affidavit from your former spouse (if it is a joint application), or
- An affidavit from an independent third party (such as a friend or family member)
The court will look at changes, such as:
- Sleeping arrangements
- Moving into separate bedrooms
- Financial arrangements
- Separate bank accounts
- Dividing bills differently
- No longer pooling income
- Household arrangements
- Cooking separately
- Doing your own laundry
- Reduced shared domestic tasks
- Social presentation
- Telling friends and family you have separated
- Not attending social events together as a couple
- Emotional and physical relationship
- Ending the sexual relationship
- No longer functioning as a couple emotionally
Read our blog to find out more: Reasonable Grounds To Refuse Mediation in Australia
Why Is Evidence So Important?
If the court is not satisfied that separation genuinely occurred for the full 12 months, your divorce application may be delayed or dismissed.
This can have flow-on consequences:
- Property settlement applications must generally be filed within 12 months of divorce becoming final.
- Spousal maintenance time limits may apply.
Understanding the legal definition of separation can prevent costly mistakes later.
Our property settlement lawyers can advise on how separation timing directly affects your financial claims and what steps to take now to protect your position.
What About Centrelink?
If you receive government benefits, different definitions of separation may apply under social security legislation. Services Australia assesses factors such as:
- Financial interdependence
- Living arrangements
- Nature of the relationship
- Public representation of the relationship
The legal test for divorce and the social security test is related but not identical. It is important to ensure your position is consistent across applications.
Some important things to note are that:
- You can be separated under one roof.
- Occasional interaction does not automatically prevent separation. The court looks at the overall breakdown of the relationship.
- Failing to communicate separation to others can make proving it more difficult later.
How O’Sullivan Legal Can Help
Proving separation under one roof can become complicated, particularly where:
- There are children involved
- There are disputes about when separation occurred
- Financial arrangements remained partially intertwined
- Family violence or controlling behaviour was present
If family violence or coercive control is a factor in your separation, our domestic violence legal team can advise on protection orders and how they interact with your divorce proceedings.
At O’Sullivan Legal, our team provides clear advice about divorce, separation, parenting arrangements and property settlement. We help you understand:
- When your 12-month separation period legally begins
- What evidence you should gather
- How to prepare affidavits correctly
- How separation timing affects property and spousal maintenance claims
We are committed to making the process easy, efficient and as worry-free as possible. Enquire now.
Speak to a Trustworthy Divorce Lawyer Today
If you are unsure whether you are legally separated, child support, or are preparing to file for divorce, a lawyer in your corner protects your position.
Call O’Sullivan Legal on (02) 8114 4511 for comprehensive legal advice on Australian family law. We are divorce lawyers who support cases in Sydney, Parramatta, and Melbourne.
Contact us to be guided through every step and ensure your rights and interests are protected. We’ll build a brighter future for you.
Ben O’Sullivan is the Director of O’Sullivan Legal and holds a Master of Applied Family Law.
Respected for his strategic insight and compassionate approach, Ben has acted for clients in complex property settlements, parenting disputes and criminal law matters throughout New South Wales and interstate.
Drawing on his strong commercial background, Ben combines technical legal expertise with a practical, real-world perspective to deliver clear, results-focused advice in every matter.
Learn more about our areas of practice.
Frequently asked questions
Can you be legally separated while still living together in NSW?
Yes. The Family Law Act 1975 allows separation under one roof. You must demonstrate the relationship genuinely ended through changed sleeping, financial, and social arrangements, supported by affidavit evidence from yourself or a third party.
When does the 12-month separation period start in NSW?
It begins when one or both parties form and communicate the intention to end the relationship and begin acting consistently with that decision. The date is not always clear-cut and may require legal advice to confirm.
What evidence do I need to prove separation under one roof?
Courts look at sleeping arrangements, separate finances, divided household tasks, and how you presented socially. An affidavit from a friend or family member who observed the changes significantly strengthens your divorce application.
Does separation affect my property settlement rights in NSW?
Yes. The timing of separation directly affects when property settlement time limits begin. Applications must generally be filed within 12 months of a divorce order becoming final. Getting early legal advice protects your financial position.
What if my former partner disputes the separation date?
Disputed separation dates can complicate both divorce and property proceedings. Our family lawyers in Sydney, Melbourne, and Parramatta can help you gather the right evidence and present your timeline clearly to the court.
