Separated Under One Roof Divorce: How to Apply for Divorce Without Living Apart

Many separated couples continue living in the same home for months, or even years, before they formally divorce. Sometimes this is a deliberate financial decision while a property settlement is worked out. Sometimes it is about keeping things stable for children, or simply not being able to afford two households straight away. Whatever the reason, a common question follows: if you are still under the same roof, can you actually apply for divorce?

The short answer is yes. Australian family law recognises that separation is about the state of the relationship, not the address on your licence. But when you and your former partner have shared a home during any part of the twelve months before you file, the Federal Circuit and Family Court of Australia (FCFCoA) will look more closely at your application, and it will expect you to prove your separation with more than your own say-so. This article explains what separated under one roof divorce actually means in law, what the Court expects to see, and how to put together an application that holds up.

This article provides general information about the law in Australia. It is not legal advice, and it does not take into account your personal circumstances. If you are preparing a divorce application while still living with your former partner, we recommend getting advice specific to your situation before you file.

What Does Separated Under One Roof Mean Legally?

Divorce in Australia is granted on a single ground: that the marriage has broken down irretrievably, evidenced by twelve months of separation immediately before the application is filed, with no reasonable likelihood of the relationship resuming. This is set out in section 48 of the Family Law Act 1975 (Cth). Critically, the Act does not require separated couples to live at different addresses. Section 49(2) specifically provides that parties to a marriage may be held to have separated and to have lived separately and apart even though they have continued to reside in the same residence, and even if one of them has continued to perform some household services for the other.

In practice, this means separation is a question of fact about the marriage itself, not about postcodes. The Court is looking for evidence that the marital relationship, in the ordinary sense of shared life, finances, intimacy and future planning, has genuinely ended, even though the practical business of sharing a house has continued for reasons of convenience, cost or care for children.

How the Court Assesses a One Roof Separation Divorce Application

The 12-Month Separation Requirement

The twelve-month clock starts from the date you and your former partner actually separated, not from the date you eventually move into different homes or file your application. If you have been under one roof for the whole of that period, or for only part of it, you need to be able to identify the specific date separation occurred and be ready to explain why the Court should accept that date, even without a change of address to point to.

One added complication under section 48(3) is that the Court will not grant a divorce order if it is satisfied there is a reasonable likelihood of the relationship resuming. Continuing to live in the same house, particularly if you are still sharing a bedroom, attending events together as a couple, or presenting as a couple socially, can make this harder to demonstrate. This is exactly why the evidentiary bar is higher for a separated under one roof divorce application than for a straightforward case where the parties moved into separate homes on the day they separated.

Evidence the Court Expects to See

Where any part of the twelve-month separation period was spent living at the same address, the FCFCoA requires additional affidavit evidence beyond the standard divorce application. As a general rule, you will need to file your own affidavit addressing the practical changes in your life since separation, together with a supporting affidavit from an independent third party, such as a friend, family member, or neighbour, who can speak to their own observations of the separation.

What Evidence and Affidavits You Will Need

Your Own Affidavit of Separation

Your affidavit should set out, with specific dates and practical detail rather than general assertions, the changes that mark your separation. Courts have typically looked for evidence addressing matters such as separate bedrooms or sleeping arrangements, the end of a shared social and intimate life as a couple, changes to how finances are managed, including bank accounts, bills and shared expenses, a reduction or end of joint activities such as family outings presented publicly as a couple, and changes to how household tasks and caring responsibilities are divided. It should also explain, honestly and specifically, why you have continued to share a home. Financial necessity, co-parenting stability, or the time needed to sell a property are all legitimate reasons the Court is used to seeing, but they need to be stated, not assumed.

Independent Witness Affidavits

Because you have an obvious interest in the outcome, the Court generally also requires a corroborating affidavit from someone independent of the marriage who can confirm, from their own knowledge, that they understood the two of you to be separated during the period claimed. This might be a family member, close friend, or another person who has spent time in or around your household and can speak to what they personally observed, rather than simply repeating what you have told them. The FCFCoA publishes affidavit forms for this purpose (correct as at the date of this article, and worth confirming on the FCFCoA website before you file, since court forms and requirements are updated from time to time), and using the correct form matters, since a poorly drafted or overly generic affidavit is one of the more common reasons these applications attract a registrar's queries.

If the Registrar Is Not Satisfied

Not every application succeeds on the papers the first time. If a registrar is not satisfied that separation has genuinely occurred, the usual response is a request for further affidavit material rather than an outright refusal, though in some cases the matter may be referred to a hearing before a judicial registrar or judge. This adds time, and in the case of a hearing referral, the possibility of an additional court event fee, on top of the delay of having to gather and file further evidence. It is not a common outcome for a well-prepared application, but it is a real one, which is exactly why the quality of your affidavit evidence matters more here than in a standard divorce application where the parties have already moved into separate homes.

Common Reasons Couples Separate Under One Roof

There is nothing unusual or legally suspicious about remaining under one roof after separation, and the Court deals with these applications regularly. The most common genuine reasons include waiting for a property to sell or a refinance to complete before either party can afford to move out, keeping a stable home environment for children while other arrangements are finalised, the practical difficulty of finding and affording a second property in a tight rental market, and a mutual, practical decision to co-exist civilly while property settlement or parenting arrangements are worked through. None of these reasons weaken your entitlement to a divorce. They do, however, make it more important that your evidence clearly explains the practical reason for the arrangement, so the Court does not mistake ongoing cohabitation for ongoing marriage.

Risks and Pitfalls to Avoid

The most frequent problem with these applications is an affidavit that is too general to satisfy the Court, phrases such as "we are no longer together" without the specific, dated detail the registrar needs to be satisfied of the separation date and its continuation. Another common issue is inconsistency between what is said in the application and what is visible elsewhere, such as continuing to present as married on social media, joint attendance at family events without any acknowledgement of separation, or shared financial conduct that looks indistinguishable from an intact marriage.

How to Strengthen Your Application for Divorce

A separated under one roof divorce application regularly succeeds where it is properly evidenced, but the outcome is not automatic, and it depends on the individual registrar being satisfied on the material you file, not on the mere fact that you are entitled to a divorce. The strongest applications are prepared with the same discipline as any other piece of evidence filed in court: specific dates, independent corroboration, and a clear, honest account of both the separation itself and the practical reasons the household has continued. Getting this right the first time avoids the delay, and the possible additional filing or hearing costs, that come with a registrar querying an underprepared application. As at 1 July 2026, the FCFCoA filing fee for a divorce application is $1,170, with a reduced fee of $390 available to eligible concession card holders, though we would always recommend confirming the current fee on the FCFCoA website before filing, since court fees are reviewed periodically. Neither the standard nor the reduced fee is refunded if the application needs to be revised and refiled.

This article is about the divorce application itself. If your separation also involves unresolved parenting or property matters, those are dealt with separately, and often benefit from being addressed, or at least turned into a plan, before or alongside your divorce application.

If you are still living with your former partner and are ready to apply for divorce, KD & Co Lawyers can help. Start with a free 15-minute introductory call to talk through your situation, and if an Application for Divorce is the right next step, we will help you prepare it, together with the supporting affidavit evidence, so it is built to withstand scrutiny from the outset.