What is separation under one roof?
"Separation under one roof" describes a couple who have decided their relationship is over but continue, at least for a time, to live in the same home. It is common and entirely valid. People stay under one roof for financial reasons — running two households is expensive — for the stability of the children, while a property settlement is sorted out, or simply because finding somewhere else to live takes time.
What matters legally is not whether you share an address, but whether the relationship has genuinely ended. In Australia you can be separated for every legal purpose — divorce, property settlement, Centrelink — while still sleeping under the same roof, provided you can show the marriage or de facto relationship is over in substance.
Is separation under one roof legally recognised in Australia?
Yes. Under the Family Law Act 1975, separation happens when at least one person forms the intention to end the relationship, communicates that to the other, and acts on it. Nothing in the law requires you to live at different addresses. The courts have long accepted that a couple can be "separated but living under the same roof", and the Federal Circuit and Family Court of Australia has a specific process for proving it when you apply for a divorce.
This matters because a divorce in Australia requires you to be separated for at least 12 months and one day before you can apply. Time spent separated under one roof counts towards that 12 months — you just need to be able to evidence it.
How do you show you've genuinely separated?
Because you're still living together, you may need to demonstrate that the relationship has actually ended rather than merely become strained. No single factor is decisive; a court or agency looks at the overall picture across several areas of life.
| Area of life | What genuine separation can look like |
|---|---|
| Sleeping arrangements | Separate bedrooms, or one partner moving to another part of the home |
| Finances | Separate bank accounts, divided bills, no longer pooling income |
| Household tasks | Each person cooks, cleans and shops for themselves rather than for the couple |
| Social life | Attending events separately; no longer presenting as a couple |
| Others' knowledge | Family, friends and agencies such as Centrelink have been told you've separated |
You don't need every box ticked. The point is to show a consistent pattern that the relationship has ended, not just a rough patch. Keeping a brief note of when things changed — when you moved to a separate room, when you split the accounts — makes this far easier to evidence later.
The date of separation matters
Your date of separation sets the clock running on time limits for both divorce and property. It can also affect Centrelink entitlements and how assets are valued. If you're separated under one roof, pin the date down early so you understand exactly where you stand.
The affidavit you'll need when you apply for divorce
When you have lived under the same roof during the 12-month separation period, the court won't simply take your word for it. You will usually need to file an affidavit setting out the changes in your relationship — sleeping arrangements, finances, household duties and social life — together with a corroborating affidavit from an independent person, such as a friend or family member, who can confirm they understood you to be separated. The FCFCOA divorce process sets out exactly what these affidavits should cover.
It sounds onerous, but in practice it is a short, factual statement. The earlier you have clarity on your separation date and the changes that followed, the simpler this step becomes.
How your separation date affects time limits
Separation isn't only about divorce. It also starts the clock on the deadlines for finalising a property settlement, and those deadlines differ for married and de facto couples.
| Step | Married couples | De facto couples |
|---|---|---|
| Apply for divorce | After 12 months' separation | Not applicable |
| Apply for a property settlement | Within 12 months of divorce becoming final | Within 24 months of separation |
| Parenting arrangements | No time limit | No time limit |
Applying after a deadline isn't impossible, but you need the court's permission, which adds cost and uncertainty. If a deadline is approaching, it is worth formalising arrangements while everyone is still cooperating. Read our property settlement guide →
Centrelink, tax and finances while under one roof
Once you separate, you may be assessed as a single person for some payments even if you still share an address. Services Australia can recognise you as separated under one roof and may ask for a separation form and supporting details. Being upfront and consistent — the same separation date you'd give the court — keeps things clean across the board and avoids problems down the track.
Living together while separated: practical tips
The arrangement works best when expectations are clear. A few things make a real difference:
- Agree on space and schedules — who uses common areas when, and how you'll handle meals, laundry and the bathroom.
- Separate your money early — open individual accounts and divide responsibility for bills so nothing falls through the cracks.
- Keep the children's routine steady — shield them from conflict and present a united, calm front about the practical changes.
- Document the change — note your separation date and the adjustments that followed, which helps with both divorce and Centrelink later.
- Plan the exit — treat the shared-roof period as temporary and agree a rough timeline for one person to move on.
How mediation helps when you're still living together
Living together while separated can be tense, and small frictions — bills, the school run, who uses the kitchen when — can escalate quickly. Mediation provides a structured, neutral way to agree on living arrangements, finances and parenting while you remain under the same roof, and to plan an orderly transition out of it.
A mediator can help you set practical ground rules for the household, work towards a property settlement and parenting arrangements, and reach agreements you can later formalise as consent orders. If being in the same room is difficult, mediation can be conducted in separate rooms (shuttle mediation) or online. See getting ready for separation →