A reader who put a sibling on the deed of an expensive home and now regrets it is asking a question many co-owners eventually face: once someone else holds a share, can they force the whole property to be sold? The short answer from real-estate and estate attorneys is that, in most cases, yes — though the details depend on state law and how the deed is written.
What a partition action is
The legal tool a co-owner uses is a partition action, a lawsuit asking a court to either divide jointly owned property or order it sold. Critically, almost any co-owner can bring one, and courts generally will not require a reason. In most states a co-owner can force a sale regardless of the size of their share, and regardless of whether the other owner wants to sell.
Courts can divide raw land into parcels ("partition in kind"), but they generally cannot cut a single house in two. For a residence, that usually means a "partition by sale" — often at auction — with the proceeds split by ownership share. The practical takeaway: a half-owner who insists can typically compel a sale of the home.
Joint tenancy vs. tenancy in common
How the deed is titled matters most for what happens when an owner dies. Under joint tenancy with right of survivorship, the surviving owner automatically inherits the deceased co-owner's share outside of probate. Under a tenancy in common, there is no automatic survivorship — each owner can hold an unequal percentage, sell their interest without consent, and leave their share to anyone in a will. Either way, both forms generally leave the door open to a partition suit.
The gift-tax angle
Handing over half of a $1.5 million home is itself a taxable gift of roughly $750,000 in fair-market value. That is far above the 2025 annual gift-tax exclusion of $19,000 per recipient, so a gift-tax return is required. In practice, most people owe no tax: the excess is deducted from the lifetime estate and gift-tax exemption, which is $13.99 million per individual in 2025 and rises to $15 million in 2026.
There is a hidden cost, though. A gifted asset carries a "carryover basis" — the recipient inherits the giver's original cost basis rather than getting the "step-up" to market value that heirs receive at death. That can mean a larger capital-gains bill if the share is later sold.
What can protect a reluctant co-owner
Gifting a share is hard to undo, but attorneys point to tools that reduce the risk of a forced sale. A written co-ownership agreement can govern how and when the property may be sold; in many states owners can contractually waive or restrict partition rights. A right of first refusal lets one owner buy the other out before any outside sale. Placing the home in a trust can also dictate the terms of ownership and transfer.
This article is educational and reflects general principles described by named legal and tax sources — not legal or financial advice. Partition rules, basis treatment and waiver enforceability vary by state, so anyone in this situation should consult a real-estate or estate attorney licensed where the property sits.
