One co-owner can lease jointly owned property without the others’ permission in most cases, but the lease only reaches that owner’s share. The other co-owners keep the right to use the property, collect their portion of the rent, and refuse to be locked out. The exception is significant: if the property is held as tenancy by the entirety between spouses, neither spouse can lease without the other, and a solo lease is generally void.
Check the Form of Co-Ownership First
The type of co-ownership on the deed decides whether a unilateral lease is even possible. Three forms cover most situations in the United States.
- Tenancy in common. Each owner holds a separate share, which can be unequal, and can sell, transfer, or lease that share independently. No permission needed.
- Joint tenancy. Owners hold equal shares with a right of survivorship. A joint tenant can lease their interest without the others’ consent, but doing so may sever the joint tenancy in some jurisdictions, converting it to a tenancy in common and destroying the survivorship right.
- Tenancy by the entirety. Available only to married couples and recognized in roughly half the states. Both spouses count as a single owner. Neither can lease, sell, or encumber the property alone.
If you are not sure which form applies, a title search or a short call with a real estate attorney will resolve it. Everything below assumes tenancy in common or joint tenancy, where one owner can act alone.
What the Lease Actually Gives the Tenant
A lease signed by one co-owner conveys only that owner’s possessory interest. If you hold a 50 percent share, you can only lease your 50 percent interest. The lease is a valid contract between you and the tenant, but it does not bind the other owners and does not shrink their rights.
That creates a real problem for the tenant. Every co-owner has what property law calls unity of possession, meaning each holds the right to occupy and use the whole property regardless of ownership percentage.1Legal Information Institute. Joint Tenancy A tenant who tries to lock a non-signing co-owner out of the house has no legal basis for doing so. The non-signing co-owner can walk in, use any room, and keep a key.
This is where most solo leases collapse in practice, even when they are legally valid. Few tenants will pay full market rent for a property another owner can enter at will. The realistic move is almost always to get the other owners’ buy-in before advertising the property.
What the Non-Leasing Owner Keeps
A Share of the Rent
A co-owner who did not sign the lease is still owed a share of the rental income proportional to their ownership interest. Own 40 percent, get 40 percent of the net rental profit. Net profit means total rent minus legitimate property costs such as mortgage payments, property taxes, insurance, and repairs.
The leasing co-owner cannot keep the whole rent just because they found the tenant. The obligation to share rent from third-party tenants applies even when the other owner never wanted the property rented in the first place.
The Right to Keep Using the Property
The non-leasing owner’s right to possess and use the property survives the lease. The tenant’s occupancy rights sit alongside the existing owner’s rights rather than replacing them.
No Power to Evict the Tenant
Something that surprises non-leasing owners: you generally cannot evict a tenant your co-owner put in place. Courts have held that one co-owner cannot cancel a lease executed by another and remove the tenant. Your remedy is financial (your share of the rent) and, if things do not improve, legal (partition). Trying to physically remove the tenant can expose you to trespass liability.
The logic is simple. If your co-owner has the right to occupy and the right to transfer that occupancy, the person they transferred it to has a legitimate claim to be there.
The Ouster Trap for the Leasing Owner
Ouster happens when one co-owner, or their tenant, effectively locks another co-owner out of the property. Changing the locks, refusing entry, or making the property practically unusable all count. When a tenant treats a leased property as exclusively theirs, the line between a valid lease and an ouster can disappear quickly.
Ouster matters because it changes what the excluded owner is owed. Normally, a co-owner who lives alone on jointly owned property owes nothing to the absent owners for that personal use. Once ouster is established, the excluded owner can demand compensation equal to their share of the property’s fair rental value. If the property is leased and the non-leasing owner is kept out, the ouster strengthens their claim to rental income and may support additional damages against the owner who signed the lease.
If you are the one leasing, the practical point is to make sure the tenant understands the other owners’ access rights before they move in. A tenant acting as though they have exclusive possession can create liability for you, not just for themselves.
A Co-Ownership Agreement Prevents Most of This
The default rules tell you what each owner is entitled to but do nothing to stop the fight. A written co-ownership agreement, signed before anyone wants to lease, can override the defaults and save real money.
A useful agreement usually addresses:
- Whether a lease requires unanimous consent, majority approval, or just advance notice.
- How rental income will be divided and when payments will be distributed.
- Which owner covers mortgage, taxes, insurance, and maintenance, and how those costs factor into rent distributions.
- Minimum lease duration, minimum rent, and tenant screening standards.
- Whether disputes go to mediation or arbitration before anyone can sue.
The document goes by different names depending on the structure. For tenants in common, it is often called a tenancy-in-common agreement or co-tenancy agreement. If the property is held through an LLC, the operating agreement plays the same role. Specificity matters more than format. Language like “owners will cooperate on leasing decisions” is close to useless when someone actually objects.
If the Dispute Cannot Be Resolved
Demand an Accounting
A co-owner who suspects they are being shortchanged on rent can demand an accounting. A court reviews all income the property generated and all expenses incurred, then calculates what each owner is owed: rent collected, taxes paid, mortgage contributions, repair costs, everything that touched the property. Co-owners can also agree to hire an accountant or mediator to do this privately without filing anything.
File for Partition
When the relationship is past saving, a partition action ends the co-ownership. A court either physically divides the property (partition in kind) or, more commonly, orders it sold and splits the proceeds (partition by sale). Any co-owner can file for partition at any time regardless of ownership share, and courts generally grant it because the law disfavors forcing people to stay in unwanted co-ownership.
Partition is expensive. Attorney fees and court costs commonly run between $5,000 and $30,000 or more depending on complexity, and those costs often come out of the sale proceeds before anyone gets paid. A tenant in place may have to vacate, though lease terms addressing early termination on sale can soften that.
The threat of partition frequently accomplishes what the lawsuit would. An owner facing a credible partition notice often becomes more willing to negotiate a buyout, agree to lease terms, or settle the accounting, because a forced sale rarely serves anyone except the lawyers.