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How the 10-year rule could affect your property in Washington

On Behalf of | Jun 23, 2026 | Neighbor Disputes |

If a neighbor’s fence, shed or driveway has been sitting on your land for years, what started as a minor boundary issue can become a serious legal problem. In Washington, a neighbor who uses a portion of your property openly and continuously for ten years may have grounds to claim legal ownership of it. Understanding how this works is the first step toward protecting what is yours.

What adverse possession is and how it works in Washington

Adverse possession allows someone who has been using land they do not own to eventually claim legal title to it. In Washington, the standard period is ten years, though it can be shortened to seven if the person holds a document suggesting ownership and has been paying property taxes in good faith.

If a neighbor uses a strip of your land openly for that long without your permission, they may gain legal ownership; a quiet title lawsuit then makes that transfer official. This comes up most often when a fence sits a few feet over the property line, a driveway extends onto a neighbor’s lot, or someone maintains a strip of land they do not actually own.

What a claimant must prove to win

Washington courts use what is sometimes called the OCEAN framework to evaluate adverse possession claims. To succeed, a claimant must show that their use of the land was:

  • Open: visible and not hidden
  • Continuous: uninterrupted for the full statutory period
  • Exclusive: not shared with the general public or the property owner
  • Actual: involving real, physical use of the land
  • Notorious: use that a reasonable property owner would have noticed

Every element must be proven for the entire statutory period. If any is missing, the claim fails. Washington courts do not require the claimant to have acted in good faith, meaning someone who knowingly uses your land can still succeed.

What you can do to protect your property

The most effective protection is early action. If you suspect a fence, structure or landscaped area may be encroaching on your land, a boundary survey can confirm the actual property line. If an encroachment exists, taking action before the statutory period expires preserves your rights. Options include:

  • Documenting the encroachment and notifying your neighbor in writing
  • Granting a written license that makes the use permissive rather than adverse, interrupting the clock
  • Working with an attorney to resolve the boundary issue before it becomes a legal dispute

Once the statutory period is complete, your options become significantly more limited and more expensive.

Protecting what is yours

You may not think about your property boundaries until there is a problem. If you have questions about a potential encroachment or want to make sure your property rights are protected, speaking with a real estate attorney familiar with Washington law can help you understand where you stand and what steps to take.

 

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