Tenhet v. Boswell, 18 Cal. 3d 150, 133 Cal. Rptr. 10, 554 P.2d 330 (Cal. 1976)
Tenhet v. Boswell is a cornerstone California property case clarifying what happens when one joint tenant, acting without the other's consent, leases jointly held land.
Does a lease executed by one joint tenant, without the consent of the other, (1) sever the joint tenancy, or (2) survive the lessor joint tenant's death so as to bind the surviving joint tenant?
Under California law, a joint tenant may unilaterally lease his or her own interest, and the lease is valid to the extent of the lessor joint tenant's rights; however, such a lease does not sever the joint tenancy and does not survive the lessor joint tenant's death. Upon the lessor joint tenant's death, the right of survivorship operates to vest full title in the surviving joint tenant free and clear of the unilaterally created lease or similar encumbrances, absent a severance by conveyance, mutual agreement, or other legally recognized act. See also Swartzbaugh v. Sampson (recognizing that a lease by one joint tenant is valid as to the lessor's rights but does not, by itself, sever the joint tenancy).
A lease by one joint tenant does not sever the joint tenancy and terminates upon the death of the lessor joint tenant. The surviving joint tenant takes the property by right of survivorship free of the lease, and is entitled to quiet title and immediate possession.
Tenhet v. Boswell is a leading case on the interaction between joint tenancy and leases. It teaches that while one joint tenant can lease without consent and the lessee may enjoy present possessory rights, the lease neither severs the joint tenancy nor survives the lessor's death. For students, it crystallizes how derivative interests terminate when the underlying joint tenant's estate is extinguished at death, and it underscores the policy of protecting survivorship as the core attribute of joint tenancy. It also pairs naturally with Swartzbaugh v. Sampson on unilateral leasing rights and with severance doctrines more broadly.