What Are the Requirements for Adverse Possession in Oregon?

To claim land through adverse possession in Oregon, you must prove ten years of actual, open, notorious, exclusive, hostile, and continuous possession, hold an honest and reasonable belief the entire time that you were the real owner, and prove every element by clear and convincing evidence. All of this comes from ORS 105.620, and Oregon’s requirements are among the strictest in the country.¹ Miss one element and the claim fails.

Clear and convincing evidence is a higher bar than an ordinary civil case. It’s not enough to show your version is more likely than not. You need something closer to a high probability, because a successful claim strips another person of their property rights.

One myth worth clearing up first: paying property taxes on the disputed land is not a requirement in Oregon. The statute doesn’t mention taxes at all.¹ Some other states require it, which is likely where the confusion comes from. Tax records can still help prove honest belief, but they aren’t a standalone element.

The Honest Belief Requirement

The feature that sets Oregon apart is the honest belief standard in ORS 105.620(1)(b). When you first entered the property, you must have genuinely believed you were the owner. That belief has to have continued for the full ten years, rested on an objective basis, and been reasonable under the circumstances.¹

This eliminates intentional land grabs. Someone who knows the land belongs to a neighbor and occupies it anyway cannot succeed no matter how long they stay. The statute is aimed at genuine mistakes: a homeowner who builds a shed two feet past the property line after misreading a survey, then maintains that strip for over a decade without realizing the error.

Oregon courts have shaped what “objective basis” and “reasonable” mean. In Wood v. Taylor (2020), the Oregon Court of Appeals held that a property owner who assumed a chain-link fence marked the true boundary had an honest belief based on that mistaken assumption, because there was no conscious awareness of encroaching on the neighbor’s land. In Clark v. Ranchero Acres Water Co. (2005), the court confirmed that a pure but reasonable mistake can still establish hostile possession.²

The moment you learn the land might not be yours, the belief stops being reasonable. If a neighbor tells you the fence is off, or a survey reveals the true line, the honest belief requirement fails entirely. You now have conscious awareness that the land may belong to someone else, and the claim cannot survive that.

The Six Possession Elements

ORS 105.620(1)(a) requires possession that is actual, open, notorious, exclusive, hostile, and continuous for ten years.¹ All six have to be present the entire time.

Actual and Continuous

Actual possession means physically using the land the way a true owner would, not just claiming it on paper. What counts as sufficient use depends on the property. For a residential lot, living on and maintaining it qualifies. For rural acreage, the bar adjusts to what a reasonable owner of that kind of land would do. The statute specifically provides that grazing livestock alone is not enough.¹

Continuous means without significant interruption. Ordinary absences like vacations don’t break continuity. Extended abandonment can. You don’t have to be on the property every day; you have to show the ongoing use an owner of similar land would maintain.

Open and Notorious

Your use has to be visible enough that a reasonably attentive owner would notice. Secret use fails this test. Structures, fencing, landscaping, and other visible improvements all support it. The idea is that the record owner had a fair chance to spot the occupation and act on it.

Exclusive

You must treat the land as yours alone. If the record owner also uses it during the ten years, mows part of it, or crosses it periodically, exclusivity weakens. The general public using the land the same way cuts against you too.

Hostile

Hostile doesn’t mean aggressive. Under ORS 105.620(2)(a), it means possession “under claim of right or with color of title.” Color of title refers to holding a written document, like a deed, that appears to convey ownership but is defective. Claim of right covers cases where you simply believe you own the property without any written instrument.¹

Permissive use is never hostile. If the true owner gave you permission, even informally, your possession is not adverse no matter how many years pass. This is the single most effective defense a property owner has.

Adding a Predecessor’s Time (Tacking)

You don’t have to be the same person who started possessing the land ten years ago. ORS 105.620(1)(a) refers to “the person and the predecessors in interest of the person,” which allows tacking: adding a predecessor’s period of possession to your own to reach ten years.¹

The predecessors have to be connected by a legal transfer, such as a sale or inheritance. If one occupant leaves and a stranger moves in, the newcomer can’t count the first person’s years. The honest belief requirement also has to hold for each successive possessor throughout the combined period.

Land You Cannot Claim

County-owned public land is off-limits. ORS 275.027 provides that no title or property rights to public lands can be acquired against a county through any statute of limitations.³ Decades of use on county land will not create ownership. Federal land is likewise generally immune from state adverse possession under sovereign immunity. The rule runs one way, though: ORS 105.620(3) defines “person” to include the state and its political subdivisions, so the government itself can use adverse possession against private owners.

When the Ten-Year Clock Pauses

Oregon tolls the clock for owners who cannot protect their own rights. Under ORS 12.160, the time to bring an action to recover the property is extended if the owner was a minor or had a disabling mental condition when the adverse possession began.⁴

Tolling is capped. For minors, the deadline extends by whichever comes first: five years from when the cause of action arose, or one year after the person turns 18. For a person with a disabling mental condition, the extension lasts no more than five years, or one year after the condition ends, whichever is shorter.⁴ Extra time, not an indefinite freeze.

How Owners Stop a Claim Before It Ripens

If you own land in Oregon and someone else is using part of it, you have practical ways to keep an adverse possession claim from ever maturing. The simplest is written permission. Permissive use is not hostile, and a short letter or email acknowledging that you own the land and are letting the other person use it can defeat any future claim.

Other protective steps:

Inspect your property regularly. Walk the boundaries, check for encroachments, and compare what’s on the ground to your survey or plat map.
Post the property. “No Trespassing” signs and boundary markers signal that the land is neither abandoned nor unclaimed.
File an ejectment action. If someone refuses to leave, you can sue to recover possession. ORS 12.050 gives you ten years from the start of the adverse use to bring the action.⁵
Get a current survey. Most boundary disputes start because nobody knows where the real line falls. A professional survey removes the ambiguity and destroys the honest belief foundation of any future claim.

Doing nothing is the worst option. Ten years of inaction while someone else openly treats your land as their own is exactly the situation the statute was written for. Absentee owners and heirs who rarely visit inherited property are the most common targets.

Filing a Quiet Title Lawsuit

An adverse possessor who has met the statutory requirements still has to go to court. There is no administrative shortcut. ORS 105.605 authorizes suits to determine conflicting claims to real property, and this is the vehicle for converting adverse possession into legal title.⁶

The complaint has to identify the property, describe how each element of ORS 105.620 is satisfied, and name every party with a potential interest, including the record owner, mortgage holders, and lienholders. Leaving anyone out can expose the judgment to a later challenge. The standard circuit court filing fee is $281.⁷

After filing, the court issues a summons. Defendants have 30 days from the date of service to respond.⁸ If the record owner contests the claim, the case goes to trial. You carry the full burden of proof, and you should expect to present property tax records, photographs showing long-term use, boundary surveys, testimony from neighbors, and any documents supporting honest belief, such as a defective deed or a seller’s statements about the boundaries. If the owner does not respond, you can seek a default judgment, but courts typically still require an evidentiary showing before extinguishing another person’s title.

After the Court Rules

A judgment in your favor extinguishes the prior owner’s title. Record the court’s order with the county clerk in the county where the property sits, and public records will reflect the new ownership. You may also need to file a new deed and update the property tax account with the county assessor so future tax statements go to the right place. The land carries with it whatever zoning restrictions, easements, and environmental obligations run with title, some of which may not have been obvious during the years of informal use.

1
Oregon State Legislature. Oregon Code 105.620 – Acquiring Title by Adverse Possession
2
Oregon Public Law. Oregon Code ORS 105.620 – Acquiring Title by Adverse Possession
3
Oregon Public Law. Oregon Revised Statutes ORS 275.027 – Adverse Possession of County Lands
4
Oregon Public Law. ORS 12.160 – Suspension for Minors and Persons Who Have Disabling Mental Condition
5
Oregon Public Law. ORS 12.050 – Action to Recover Real Property
6
Oregon State Legislature. Oregon Revised Statutes Chapter 105 – Property Rights
7
Oregon Public Law. ORS 21.135 – Standard Filing Fee
8
Oregon Public Law. Oregon Rules of Civil Procedure 7 – Summons