Kindly do not open a new question if you have follow-up questions -simply reply back to me in this thread.
Unlike divorce, where there are clear-cut court procedures for separating joint assets, the financial disentanglement of an unmarried relationship is comparatively murky. The best plan is to try and work out a fair settlement on your own.
Mediation, which is often used in divorce, can be a great way to get some help sorting things out, but in your situation there is no community property/equitable distribution the way there would be in a divorce or partnership dissolution.
If you can’t agree on how to split up everything, you’re left with having to file an "action for partition, which is like dividing up the assets of a jointly owned business. Regular civil courts are not trained or set up to handle these kinds of domestic disputes with the same sensitivity and nuance as family courts. Common law applies to property at a breakup like this: each person leaves with what they brought in.
As for items acquired jointly, courts may try to figure out who paid for what and divide them in that way. But most courts don’t have the time for such detailed unraveling, and so assets are often divided 50/50. There is no consideration of financial need, contributions to the relationship, or a big picture analysis.
Hence, why I said that ideally, the best solution is to try and work something out with your partner to come to an agreement that is fair to both of you.