Partition Actions in California
By Josué Cristóbal Guerrero, Founding Partner · Published

In short
If you own California real property with someone else, you may have a right to partition it under Code of Civil Procedure section 872.210. For actions filed on or after January 1, 2023, the Partition of Real Property Act adds an appraisal and cotenant-buyout process for qualifying tenancy-in-common property when no recorded binding agreement governs partition.
The right, and why it is powerful
The right to partition is close to absolute. A co-owner does not have to show that the others behaved badly, or that the property is being mismanaged. Under Code of Civil Procedure section 872.210 the right arises from co-ownership itself, and nothing more.
That makes it the lever in almost every co-ownership deadlock. One owner wants to sell and another wants to keep. The one who wants to sell can generally get there. Understanding that early usually improves the negotiation, because the alternative to agreement is not stalemate.
What changed in 2023
The Partition of Real Property Act sits at Code of Civil Procedure sections 874.311 and following. For actions filed on or after January 1, 2023, it applies to qualifying property held as a tenancy in common when there is no recorded binding agreement governing partition. Where those conditions are met, the Act changed the outcome significantly.
The co-owners who did not bring the action get a right to buy out the share of the one who did. The price is a value the court determines, and the buyout comes before any sale to the market. The Act also directs the court to prefer partition in kind, which is an actual division of the land, where that is practicable. And it directs the court to consider factors beyond pure economics.
The practical effect is that filing no longer means the property gets sold. It does make it likely that the filing party gets paid, which is often what they wanted. And the family member who wants to keep the house now has a defined route to keep it.
Accounting between the owners
Partition is not only about dividing value. The court can adjust the split to account for what each owner has contributed and taken. That covers mortgage payments, property taxes, insurance, necessary repairs, and the value of exclusive occupation by one owner.
Records matter here more than recollection. The owner who has paid the mortgage for eight years and kept the statements is in a considerably better position than the one who has done the same and kept nothing.
The realistic alternatives
One owner buys the others out by agreement. Or the property is listed and sold co-operatively, which almost always nets more than a forced sale. Or the owners sign a written agreement setting out who pays what and what happens on a future sale. That last one is worth having even between people who trust each other.
Mediation resolves a high proportion of these matters. Mediation is a meeting with a neutral person who helps the owners reach a deal. The dispute is usually about money and timing rather than principle, and both are negotiable.
How the action proceeds
A partition action begins with a complaint. It describes the property, sets out the interests of each owner, and states the relief sought. A lis pendens is typically recorded as well. That is a notice on the public record warning anyone who looks that a lawsuit affects the property, and a partition action plainly does.
The court first determines the parties' interests. That step alone resolves a number of disputes. The shares are often not what one side believed, above all where owners contributed unequally, or where an interest passed through an estate.
The court then decides the method. Under the Partition of Real Property Act the preference is division in kind, an actual split of the land, where that is practicable. The buyout process also comes before any sale. Where a sale is ordered, the court supervises it, and the proceeds are distributed according to the determined interests, adjusted by the accounting.
A referee is commonly appointed to carry out the mechanics, and a referee is a person the court puts in charge of those steps. The referee's costs come out of the proceeds.
The buyout sequence under the 2023 Act
Where the Partition of Real Property Act applies, a co-owner who has not requested partition may buy the interest of the one who has. The statute sets the order in which that happens.
The court determines the value of the property, ordinarily by appraisal. The interest of the party seeking partition is then valued as their fractional share of that figure. The other co-owners are notified and given a period to elect to purchase, which means to say in writing that they want to buy. Where more than one elects, the interest is apportioned between them.
Only if nobody elects to buy does the matter proceed toward division or sale. For inherited family property this is the change that matters most. The sibling who wants out is paid. The sibling who wants to stay has a defined route to stay.
The value is set by appraisal rather than by auction. That makes engaging properly with the appraisal the single highest-value step in the case, for both sides.
The accounting between owners
Partition is not a straight split by percentage. The court can adjust the distribution to reflect what each owner has put in and taken out. These adjustments frequently exceed the amount anyone expected.
Commonly accounted for: mortgage principal and interest paid by one owner. Property taxes and insurance. Necessary repairs, and capital improvements, meaning work that adds lasting value. Rents collected from third parties. And the reasonable value of exclusive occupation, where one owner has lived there alone.
The evidence is documentary. Bank statements, canceled checks, tax bills, invoices. An owner who paid everything for a decade and kept nothing is in a materially weaker position than one who kept the paperwork. That holds regardless of what actually happened.
Attorney fees, which run differently here
In most litigation each side pays its own lawyers, unless a contract or statute says otherwise. Partition is treated differently. The action is understood to benefit all the owners, because it resolves the co-ownership.
Costs including attorney fees incurred for the common benefit may be apportioned among the parties in proportion to their interests. In practice that means this. A co-owner who resists a partition they cannot ultimately prevent may end up contributing to the cost of the action against them.
It is not automatic, and conduct affects it. But it is a feature worth understanding before you decide to defend a partition on principle.
This article is general information about California law and is not legal advice for any specific situation. If you are dealing with this issue, the facts of your matter will change the analysis.
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