If the estate is still open and a personal representative has authority over the property, that person can generally move forward with a sale as part of their fiduciary duties, even if one heir disagrees, though the heir can raise objections with the court. If the house has already been distributed to heirs as co-owners, all co-owners typically need to agree to sell — and if one won't, Oregon law allows a partition action, where a court can order the property sold and proceeds divided.
While the estate is still in probate
A personal representative has a fiduciary duty to act in the estate's best interest — not to get unanimous sign-off from every heir on every decision. A heir who strongly disagrees can raise it with the court, but that doesn't automatically block a reasonable sale from moving forward.
After the house has been distributed to heirs
Once title passes to multiple heirs as co-owners (typically as tenants in common), the property functions like any other shared ownership situation. From that point, everyone generally has to agree to sell, or one owner can offer to buy the others out directly.
Partition actions as a last resort
If co-owners genuinely can't agree, Oregon's partition statutes let any one owner ask a court to force a sale (physically dividing a house is rarely practical, so a court-ordered sale is the typical outcome) and divide the proceeds according to each owner's share. It's a real legal remedy, not just a threat — but it's slower and adds legal costs compared to reaching agreement directly.
What we see most often
In practice, a lot of "disagreements" are really about price or timing, not about whether to sell at all. A single, clear cash offer sometimes removes the ambiguity that was driving the disagreement in the first place, since there's nothing left to negotiate or guess about.
This is general information, not legal advice. An attorney can advise on the specific ownership structure and options for this property and these heirs.