Your brother can sell property without your consent only to the extent of his own share in it. He cannot sign away the whole property unilaterally. If you hold title as tenants in common, he is free to sell his fractional interest to anyone he chooses, and the buyer becomes your new co-owner. If you hold as joint tenants, he can still sell his individual interest, but the sale breaks the joint tenancy for that share. Selling the entire property requires every owner’s signature or a court order through a partition action.
Check the Deed First
What your brother can and can’t do starts with how the deed is written. The language on the deed names the form of co-ownership, and that form controls everything that follows.
- Tenancy in common. Each owner holds a separate, transferable share. Shares don’t have to be equal. If your brother owns 40% and you own 60%, he can sell his 40% to anyone without your permission, and the buyer steps into his shoes as your new co-owner. There is no right of survivorship, so a deceased owner’s share passes through their estate.
- Joint tenancy. All owners hold equal shares with a right of survivorship, meaning a deceased owner’s share passes automatically to the survivors. Your brother cannot sell the whole property without your consent, but he can sell his own interest. Doing so severs the joint tenancy for that share.
If the deed is silent about which form applies, most states default to tenancy in common. Pull the recorded deed from the county recorder’s office if you don’t have a copy; the exact wording is what matters, not what anyone remembers being told at closing.
One form that doesn’t apply here: tenancy by the entirety is reserved for married couples in states that recognize it, so it isn’t an option between siblings.
What “Selling His Share” Actually Looks Like
Legally, your brother selling his share is straightforward. Practically, it’s a hard sell. A fractional interest in a house means the buyer would be co-owning with a stranger, so offers typically come in well below market value for the share, sometimes 30% or more below what the same percentage would fetch if the whole property were sold together. Investors who do buy these interests often do so precisely to pressure the remaining owner into a sale or a buyout.
If you’re joint tenants and he sells his interest, the joint tenancy automatically converts to tenancy in common between you and the new buyer. The right of survivorship on his share disappears. If he dies afterward, his share goes to his estate, not to you.
Selling the entire property is different. Every owner on the title must sign, regardless of whether the form is joint tenancy or tenancy in common. There is no scenario in which one co-owner can convey full ownership of the whole property to a buyer without the others, short of a court-ordered partition sale or outright fraud.
When He Tries to Force a Sale: Partition
The legal escape hatch for a co-owner who wants out is a partition action. Any co-owner can file one, and courts grant partition as a matter of right. Your brother doesn’t have to prove you did anything wrong. He only has to prove he’s a co-owner who wants to end the co-ownership.
A partition resolves one of two ways:
- Partition in kind. The court physically divides the property so each owner receives a separate parcel. Courts prefer this when it’s practical, but it rarely works for a single house.
- Partition by sale. When physical division isn’t feasible, the court orders the property sold and divides the proceeds according to each owner’s share. A commissioner or referee is typically appointed to oversee the appraisal, listing, and sale.
Partition isn’t fast or cheap. A straightforward case runs six to twelve months from filing to final distribution. Complex cases can stretch past eighteen months. Attorney fees for even a simple partition commonly run between $10,000 and $30,000, and each side generally pays its own costs unless the court orders otherwise. Those fees come off the top before proceeds are split, shrinking everyone’s share.
Extra Protection If You Inherited the Property
If you and your brother inherited the property from a parent or other relative, you may have significant additional protection under the Uniform Partition of Heirs Property Act. A majority of states have enacted some version of it. The UPHPA was designed to stop forced sales of family land at below-market prices, and it applies when the property is held as tenants in common and at least some of the owners took their interest through inheritance.
Where it applies, the UPHPA changes the partition process in three important ways:
- Court-ordered appraisal. Before anything else, the court must order a professional appraisal of fair market value. This blocks lowball sales to outside speculators.
- Buyout right. Co-owners who want to keep the property can buy out the share of the owner requesting partition. The buyout price is the appraised value multiplied by the requesting owner’s fractional interest. Co-owners typically have 45 days after learning the appraised value to exercise the right.
- Preference for keeping the property. If no one buys out, the court must weigh non-economic factors such as family heritage, long ownership, whether anyone lives on the property, and cultural significance before ordering any sale.
If the court does order a sale, the UPHPA requires it to be run on the open market through a licensed broker at the appraised value, not through a sheriff’s auction. That alone usually produces a far higher price. If your brother files for partition on inherited property, check whether your state has adopted the UPHPA, because the buyout right may be your path to keeping the home.
Right of First Refusal and Co-Ownership Agreements
Without a written agreement, you generally cannot stop your brother from selling his share to whomever he wants, assuming you are tenants in common. The way to create that protection is a co-ownership agreement, ideally signed before any dispute develops.
The usual tool inside such an agreement is a right of first refusal. Any owner who wants to sell must first offer their share to the other co-owners on the same price and terms a third-party buyer has offered. The selling owner delivers written notice identifying the buyer, price, and key terms. The other co-owners get a set window to match the offer. If they don’t act within the window, the sale to the outside buyer can proceed.
If you co-own property with a sibling and have no written agreement, it is worth putting one in place now, while relations are still intact.
If He Already Sold or Is About to Sell Without You
If you learn the property has been sold or is about to be sold without your agreement, how fast you move matters a great deal. A few steps can preserve your position:
- File a lis pendens. This is a recorded notice warning the public that the property is tied up in pending litigation. It doesn’t technically block a sale, but title companies won’t insure a property with an active lis pendens, and no careful buyer closes without title insurance. Anyone who buys after it is recorded takes the property subject to the outcome of your case.
- Seek a temporary injunction. If a sale is imminent, ask the court for an emergency order freezing the transfer while the dispute is resolved.
- File a quiet title action. This asks the court to decide who actually owns the property and issue a definitive ruling. It is especially useful when the chain of title has been muddied.
- Demand an accounting. If your brother collected rent, pocketed sale proceeds, or let expenses lapse, you are entitled to a full financial accounting. Courts can order one as part of a partition or on its own.
If your brother has gone further and forged your signature on a deed, misrepresented himself as sole owner, or fabricated documents, that is fraud. Forging a deed is a felony in most states. You can file a civil action to void the sale; courts have authority to rescind a transaction based on forged documents or material misrepresentation and restore the original ownership. The defrauded buyer may have a claim against your brother, but they do not get to keep property that was never legitimately conveyed. You can also pursue compensation for legal fees, lost rental income, and any reduction in the property’s value, and some courts award punitive damages in egregious cases. Criminal prosecution can proceed in parallel.
Prevention costs far less than litigation. Make sure your ownership interest is recorded with the county so it appears on every title search. Consider a title monitoring service or periodic checks of the recorder’s records. Title insurance covers financial losses from title defects, including fraudulent transfers you didn’t know about when you bought the policy.
Before any of these steps, talk to a real estate attorney. The right move depends on whether the sale has already closed, whether the buyer knew about your interest, and the form of title you held. Acting quickly makes a bad transaction much easier to unwind. Once the property has been resold to a good-faith buyer with no notice of your claim, recovery becomes much harder.