When Co-Heir Conflict Becomes a Legal Dispute

The Most Common Sources of Sibling Conflict

Disputes over inherited houses tend to follow a handful of patterns, and recognizing one's own situation among them is often the first step toward naming what kind of help it needs.

• Sell or keep. One sibling wants the money; another wants to keep the house or move in.
• A sibling in the house. One sibling has been living there rent-free, or managing it, and resists a sale.
• Unequal shares or a sibling left out. The will or trust divides the house unequally, or leaves one child nothing.
• Value and proceeds. Siblings disagree about what the house is worth or how the money should be split.
• Late changes. Someone believes a parent was pressured, or that the will or trust changed close to death.
• A sibling in charge. The executor or trustee is also a sibling and is accused of favoring themselves or delaying.

The left-out sibling raises the hardest feelings. A will that leaves a child nothing does not by itself give that child a share. Whether the child can challenge the will depends on the facts and on grounds and deadlines that are narrow, which is a question for a probate litigation attorney.

Sometimes siblings privately agree to share their inheritance with the one who was left out. That arrangement raises its own legal and tax questions, which an estate attorney and a tax professional review.

What California Law Says About Co-Owner Rights

Once the house has been distributed and the siblings hold title together, each owns a share of the whole. That shapes everything a co-owner can and cannot do alone.

Under California property law, each tenant in common generally has the right to possess and use the entire property, not a particular room or corner of it. One co-owner moving in does not, on its own, take away the others' ownership.

No co-owner is generally required to stay a co-owner forever. That principle is the foundation of partition, described in the next section.

A co-owner can transfer only their own fractional interest. No single sibling can sign away the whole house.

Two money questions come up often. A co-owner who has paid more than their share of carrying costs, such as a mortgage, property taxes, insurance or repairs, may have a claim for contribution from the others. A co-owner who has been shut out of the house may have a claim to offset what is owed. Whether either claim exists, and how much, depends on the facts and is a question for an attorney.

Families can also agree among themselves on who lives there, who pays what and when the house will be sold. Such an agreement is generally put in writing, because an oral understanding is hard to enforce against the property or against a later owner.

Partition: The Legal Mechanism When Co-Owners Cannot Agree

Can one sibling force the sale of an inherited property? Often, yes. Partition is a court proceeding that ends co-ownership when the owners cannot agree. Under Code of Civil Procedure section 872.210, a partition action may be commenced by an owner of an estate of inheritance, an estate for life, or an estate for years in real property owned by several persons concurrently or in successive estates, and by a co-owner of personal property. That section has an exception: an action between spouses or putative spouses to partition their community or quasi-community property cannot be brought under that title.

One sibling acting alone can file. The others cannot block the filing, though they can take part in the case.

A court resolving partition generally chooses between two outcomes. Partition in kind divides the property physically into separate parcels. Partition by sale means the court orders the property sold and divides the proceeds among the owners by share. A single-family home rarely divides in any practical way, so sale is the usual result for one.

California's Partition of Real Property Act adds rules for property held by co-owners who are related, which often describes inherited homes. Whether and how that Act applies to a particular house is a question for the attorney handling the case. The partition statutes also address how the costs of the proceeding are shared among the owners.

Partition is litigation, handled by an attorney who litigates real property cases. This page describes what the law provides, not how to bring or defend one.

Probate Contests and Trust Disputes: A Different Category

A partition case is about co-owners who already own the house. A contest or a misconduct claim is about whether the house should have gone where it went, or whether the person in charge is doing the job. These are separate proceedings.

Will contest. A challenge to whether the will itself is valid, commonly on grounds such as lack of capacity or undue influence, brought in the probate court.

Trust contest. A similar challenge to a trust or to an amendment of it.

Fiduciary misconduct. A fiduciary is a person, such as an executor, administrator or trustee, who must manage property for others. A misconduct claim says that person self-dealt, failed to account, delayed, or favored one beneficiary.

Two Probate Code sections show how these matters reach a court. Probate Code section 17200 lets a trustee or beneficiary petition the court about the internal affairs of a trust, for purposes including instructing the trustee, settling the trustee's accounts, and appointing or removing a trustee. Probate Code section 850 lets the personal representative or any interested person petition the court where the decedent died holding title to property and someone claims the property belongs to another, among other cases.

Contested probate and trust matters, including a left-out sibling's challenge and misconduct claims, are handled by an attorney who litigates trust and probate cases. This page describes what these proceedings are, not how to pursue them.

Resolving a Dispute Without Going to Court

Families who disagree still have several ways to reach an outcome without a judge, and each depends on the siblings reaching agreement.

Negotiated buyout. One sibling buys the others' shares. That takes agreement on value, a way to pay, and timing, followed by a written agreement and a deed that transfers the shares.

Mediation. A neutral third person helps the co-owners talk through an agreement. Mediation is not binding unless the parties sign a settlement agreement. It is one option among several.

Voluntary sale. Every co-owner agrees to sell and to divide the proceeds by share. That means agreeing on how to sell, what price or offer to accept, and who pays carrying costs until closing. One sibling cannot commit the others to a sale.

A voluntary sale can take three forms. A listing with a licensed real estate agent exposes the house to the open market and to buyers using loans, in exchange for a commission and the work of preparing and showing the house. A sale by the owners without an agent avoids a listing commission, but the siblings handle pricing, showings, negotiation and paperwork themselves, which is harder when they live far apart or disagree. A direct sale to a buyer who pays cash and takes the house in its present condition is the third form. Such an offer is often lower than an open-market price, because that buyer absorbs the repairs, the risk and the cost of reselling; the co-owners get less preparation, fewer showings and less dependence on a buyer's loan in return. The tradeoffs between a cash offer and a listing look different depending on the house.

Comparing written offers and estimated net proceeds, meaning the price less commissions, repairs, carrying costs, loan payoffs and closing costs, is how co-owners tell which path fits.

Property Tax and Basis Considerations When Inherited Property Is Disputed

Two tax questions sit underneath most sibling disputes, and both can change the arithmetic of selling versus keeping.

Basis. Basis is the figure used to measure gain when property is sold. Under 26 U.S.C. § 1014(a), the basis of property acquired from a decedent is generally its fair market value at the date of death. The section's alternatives are a value at an alternate valuation date when an election under section 2032 is made, a value determined under section 2032A when that election applies, and, to the extent the exclusion in section 2031(c) applies, the decedent's own basis. That rule applies to the share each sibling inherited.

Property tax reassessment. Under Rev. & Tax. Code section 63.2, beginning on and after February 16, 2021, a transfer between parents and children of the parent's principal residence can be excluded from reassessment, in whole or in part, if a claim is filed. The home must become the child's principal residence within one year, and the child must file for the homeowners' or disabled veterans' exemption within a year of the transfer. A value limit determines how much of the old taxable value carries over, and the county assessor's office publishes the current figure and the claim form. The claim is generally filed within three years after the transfer, or before the property is transferred to a third party, or before an eligible transferee no longer occupies the residence, whichever is earlier; a claim filed within six months after the mailing of a supplemental or escape assessment notice issued because of the transfer is also deemed timely.

The exclusion follows the child who moves in. When one sibling wants to keep and live in the house and another wants to sell, the result depends on how title is held, who lives there, and the date of death. A CPA, an enrolled agent or a tax attorney reviews the income-tax side; the county assessor's office handles reassessment and the exclusion claim.

When the Dispute Involves the Property's Sale

Sibling disagreement does not change who signs. If the house is still in the estate or the trust, the personal representative or the successor trustee holds authority to sell under the instrument and the law, not a majority of the heirs or beneficiaries. The courts' guide notes that when two or more people represent an estate together, they must act together.

For an estate sale of real property, Probate Code section 10308 generally requires the sale to be reported to and confirmed by the court before title passes, except as Probate Code section 10503 provides. Under Probate Code section 10503, the court-confirmation requirements, such as publication of notice of sale, court approval of agents' and brokers' commissions, sale at not less than 90 percent of appraised value, and court examination into the necessity for and advantage of the sale, do not apply to a sale made with the authority that part of the code grants. Which route applies to a given estate is a question for the estate's attorney. A sale during probate follows these steps whichever sibling objects.

If the house has already been distributed to the siblings as tenants in common, every co-owner must agree to sell the whole house. One sibling can sell only a fractional share, and a buyer of a share becomes a co-owner with the remaining siblings, which few buyers want.

Once the co-owners agree, the three forms of sale described in the out-of-court section, and the comparison of written offers and net proceeds, apply in the same way. The difference here is who signs: in an estate or trust sale, the personal representative or successor trustee accepts the offer, subject to any court steps above, rather than the siblings as a group. You can request an offer from Silver Lining Inherited Property for a direct as-is sale; a direct offer is often lower than an open-market price, and asking carries no obligation to sell. For a house that is an inherited house needing repairs, the condition questions add to the comparison.

The legal duties stay the same whoever buys. Required notices and liens still apply. On disclosures, Civil Code section 1102.2 exempts from the disclosure article it belongs to sales or transfers by a fiduciary in the course of administering a trust or a decedent's estate, except a sale by a natural person who is trustee of a revocable trust and is a former owner of the property or occupied it within the preceding year; it also exempts sales pursuant to court order, sales from one co-owner to other co-owners, and other listed transfers.