Cohabitation in California — unmarried partners living together — does not automatically create the legal rights of marriage. However, California law provides limited protections for cohabiting partners in specific circumstances, and cohabitation significantly affects existing spousal support obligations. Understanding what rights cohabitation creates, what it does not create, and how it affects divorce-related financial orders is essential for both cohabiting couples and divorced spouses monitoring their former partner's living arrangements.
Cohabitation Does Not Create Marriage in California
California does not recognize common law marriage. No matter how long two people cohabit, how they present themselves publicly, or what they call each other, cohabitation alone does not create a legal marriage or the full rights of marriage. This is a firm rule in California with no common law marriage exception for any period of cohabitation.
Marvin Claims — Cohabitation Property Rights
The California Supreme Court in Marvin v. Marvin (1976) established that unmarried cohabiting partners can enforce express or implied contracts between themselves regarding property and financial arrangements. A Marvin claim allows an unmarried cohabiting partner to seek a division of jointly accumulated property or financial compensation based on an agreement — express or implied — that the couple made about sharing their assets. Marvin claims require proving the existence of an agreement; cohabitation alone without an agreement creates no property rights.
Cohabitation and Spousal Support
If a supported ex-spouse cohabits with a new romantic partner, California Family Code section 4323 creates a rebuttable presumption that their need for support has decreased. A paying spouse who learns their ex is cohabiting can file a motion to reduce or terminate spousal support. The receiving spouse can rebut the presumption by demonstrating that cohabitation has not actually reduced their financial need — for example, if the new partner contributes nothing financially.
Cohabitation for support purposes means living together in a romantic relationship akin to marriage — not merely having a roommate or sharing space with family members. Courts look at the nature of the relationship, shared finances, and public presentation as a couple.
Furubotten Law, APC advises on cohabitation's effect on spousal support and handles Marvin claims throughout Orange County and Riverside County. Call (714) 795-3862 for a complimentary case evaluation.