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What is the purpose of a legal lot determination?

A legal lot determination by the Department of Local Services, Permitting Division (Permitting) provides an applicant with a determination of legal lot(s) status based upon the parcel history, provided by the applicant, according to local and state laws governing subdivision of property.

Citizens may also perform their own property research and determine the history of a lot and/or legal status by contacting the various agencies included in the Property Research Guide.

For more information about legal lots, refer to the Permitting customer information Legal Lot handout and Legal Lot Determination Application.

What activities require a legal lot determination?

Before a property owner can build or subdivide, a lot must meet the requirements of a legal lot, as defined in Title 19A.08.070 of the King County Code (KCC), in order for an application to be deemed complete.

The burden of proving that a lot had been legally established, and still exists as a legal lot, is the responsibility of the person claiming legal lot status.

What if evidence shows that a lot was not created legally?

If research for evidence of a legal lot proves that a lot was not created legally, customers should see KCC Title 19A.08.090, "Determining Innocent Purchaser Status."

The legal lot determination process may be used to provide a one time exemption to the subdivision requirements for an Innocent Purchaser. An exemption to the subdivision code may be requested to establish a new legal lot that is consistent with KCC Title 19A.08.040.

How much will it cost?

See the current fee schedule for an estimate.

Where can I get an application?

What is the timeline for processing this permit?

Varies depending on workload and resources available.

Notes / Comments

For more information:

Legal authority

Title 19A of the King County Code

Administered by

The Department of Local Services, Permitting Division.

Schedule a land use inspection
  • Schedule a land use inspection or if you have questions, call 206-296-6600
Keep final plans and permits displayed on-site!

Approved building and land use permits must be displayed prominently on construction and development sites.

Maintaining these records on-site is the responsibility of the applicant and/or contractor.

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