Welcome to Washington State Courts. A partition action in the State of Washington is a type of real estate lawsuit filed in the Superior Court of the county where the disputed property is located.A partition action enables you to force the sale of property when coowners are refusing to sell. In Washington state, if multiple persons hold property, each person has the freedom to partition the land if they desire to no longer co-own it. Living Together Contracts - you can use the contract here to show how you will own property and divide debts during your relationship. When two or more people own the same property, one of the owners CAN force a sale of the jointly owned property via a partition action or lawsuit.