Hi OP, I'm a family law barrister and I routinely represent parties - sometimes the applicant, sometimes the respondent - in applications for Occupation Orders. I've name changed quickly to drop and try and help with some general information. I want to be really clear that I am not giving you legal advice; I don't know the ins and outs of your situation and am not aware of the precise allegations you make, etc. What I can do is set out the legal position and the approach the court is likely to take.
Essentially, there are two alternate bases on which an OO can be made - this is set out in the Family Law act 1996 at s33.
First, the Court has to consider if you or your child would suffer significant harm if the order is not made, and then carry out what is called 'the balance of harm test' under s33(7).
Second, if that balance of harm test is not met, the Court considers the factors under s33(6).
So starting with s33(7) and balance of harm - essentially, the Court is asking itself ''Is the risk of significant harm to Mamacat612 and her child if the OO is not made, greater than the likelihood of significant harm to Mamacat612's ex if the order is made?' If the answer is YES, the Court must make the order.
If the answer is NO, the Court moves to stage two - the s33(6) factors.These are the housing needs and financial resources that each of you have; the likely effect of any order on the health, safety, and well-being of the parties and your child; and the conduct of both parties.
It's important to remember that occupation orders are draconian. You are asking the Court to temporarily terminate someone's right to occupy the property that they own. That is a big ask. Sometimes that is appropriate - for example, if there is a risk of significant harm to you or your child if you have to keep living under the same roof as your ex, because he is dangerous or abusive. And he can easily stay somewhere else temporarily. So big risk of significant harm to you if order is made, versus no real risk of significant harm to him - annoyance at having to leave his home and pay rent elsewhere or stay with a friend, yes, but not significant harm. Court would likely make the order.
If there is no risk of significant harm to you (maybe the Court considers he is unpleasant, it will be difficult, but it's just about bearable) or there is some risk too you but the risk of significant harm to him is greater (he has genuinely nowhere else to go or can't afford to live anywhere else, would be at risk of losing his job, etc.) they are unlikely to grant the order.
The important things to focus on as you think about your case and also to address the Court on are the two-stage test - make sure you specifically address that. Focus on the phrase 'risk of significant harm'. How can you explain how that applies in your case to the Judge?
Also remember that the Court's powers aren't limited to removing him or letting him stay. The Court can also make orders regulating the occupation of the property more generally - for example, limiting you to certain rooms at certain times. For example it might order that you occupy separate bedrooms and aren't allowed into each others, and each of you use common areas like the kitchen or bathroom at set times (i.e. 12-1 for you, 1-2 for him). This is only likely to work if the property is of a decent size, but it's a way that the Court might try to 'square the circle' of each of you living under the same roof while the divorce and finances are sorted. Obviously that wouldn't be appropriate if the Court felt that his presence posed as risk of significant harm to you.
Final point - even if you do get an occupation order, the Court won't make it indefinite. It will usually be short term (3, 6 or 12 months). It could run until the end of the finances being sorted out but a Court is likely to be concerned about doing that if there's no suggestion that finances will be sorted any time soon and there's no timetable in place.
As I said, just general information here. I can try and answer any specific questions you might have but am not in a position to give you very detailed legal advice; I hope you understand that.