Can you separate while still living together?
Yes. You can be legally separated from your spouse while still sharing a house. The two-year clock for divorce starts ticking from the date of separation – which can be well before either of you actually moves out.
I get asked about this a lot. It’s usually parents who can’t run two households yet, or who don’t want to disrupt the kids mid-school year, or who are simply trying to manage the transition with some dignity. There are good reasons families do this.
What “separation” actually means
The leading case is Sullivan v Sullivan [1958] NZLR 912 (CA). For parties to be “living apart” under New Zealand law, two things have to be true:
- A physical separation
- A mental attitude averse to cohabitation, held by at least one of you
Only one party needs to hold the intention. They have to communicate it, by words or by conduct. The other person doesn’t have to agree (see P Lawrence v F Baker [2013] NZHC 2378).
That’s the whole test. Everything else is evidence.
So how does that work under one roof?
The “physical separation” part doesn’t mean separate buildings. It means you’re no longer living together as a couple. Separate bedrooms. Meals stop being a default shared event. You’re no longer running a joint social life or presenting to friends and whānau as partners. The day-to-day fabric of a partnership has been deliberately set down.
In Zampino v Zampino [2020] NZFC 2789 the court drew a useful line – between couples who “keep their marriage going at a reduced level of happiness” and couples where “common aspects of family life have been deliberately discarded”. The first couple is still married. The second is separated.
In U v U [1994] NZFLR 477 the parties agreed to separate but stayed under one roof while the children finished exams. The court found they were not “living together as husband and wife” during that period, because the intention had been formed, communicated, and acted on – even though the physical move came later.
In X v X [2006] NZFC 17 the husband slept on the floor in the same room as his wife to keep up a façade for the children. The court still treated them as separated. It looked at what was actually happening in the relationship underneath.
What about sex? Or shared finances?
Section 41 of the Family Proceedings Act 1980 is clear: isolated sexual contact after separation does not by itself mean cohabitation has resumed. The court asks whether the cohabiting relationship as a whole is back on. One act, on its own, doesn’t answer that question.
Money works the same way. Joint accounts often keep running for a period after separation, because untangling finances takes time. The PRA contemplates this. Section 18B specifically allows the court to recognise post-separation contributions to relationship property. Continuing to pay the joint mortgage is consistent with an orderly separation – the courts understand that.
Why the date matters
Three reasons it’s worth being clear about your separation date.
Relationship property is fixed at the date of separation. What’s in the relationship property pool is figured on with reference to your separation date. Income you earn when you are single is generally yours (subject to spousal maintenance and child support, which run on their own rules).
Post-separation claims can come up. If one of you deliberately runs down the value of relationship property after separation, or makes significant post-separation contributions to it, the other can apply for an adjustment under the Act. It is significantly harder to make these sorts of claims for anything that happened before the break-up – as you are still considered as a team.
The two-year clock for divorce starts then. You can apply for dissolution of marriage two years after the date of separation. So the clock can already be partly run by the time someone actually moves out.
How to make the separation date stick
If you’re separating under the same roof, write it down. A short, dated email saying “we have separated as of June 19, 2026 and I want to be clear that’s my position” goes a long way. Move to a different room if you can. Tell the people in your immediate circle. Stop posting as a couple. Open a separate bank account. Change how chores are handled.
The cleaner the change in pattern, the easier it is for a court (or your future selves) to point to the date and say: that’s when it happened.
A practical note
People sometimes worry the law won’t believe a separation if no-one moved out. It will – provided the substance is there. New Zealand judges know perfectly well that two rents is impossible for a lot of families right now, that mid-school-year moves are hard on kids, and that good parents often choose continuity over their own comfort. They look at the substance.
If you’re thinking about separating under one roof and want to be sure your date will hold up, that’s a useful first conversation to have with a lawyer. Getting it clear early saves a lot of stitching-up later.
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