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Purpose

A boundary line adjustment (BLA), also known as a lot line adjustment, accommodates a transfer of land between adjacent separate lots. BLAs do not create additional lots or building sites.

They allow legal transfer of ownership and minor relocation of property boundaries or merging lots for any recorded or unrecorded, subdivided parcel. Changes in lot configurations may also be allowed provided the building site remains within the original parent parcel. This process allows for corrections to created gaps or overlaps of property caused by erroneous occupation or legal descriptions. See also Affidavit of Correction and Subdivisions. Administered by the Permitting Department. See legal authority Chapter 19A.28 (minor adjustments)* of the King County Code. Contact us at customer service 206-296-6600 for questions .

What activities require a boundary line adjustment?

Includes activities to correct property line or setback encroachments, to create better lot design, or to improve access without creating substandard lots or setbacks.

See the current fee schedule for an estimate.

Where can I get an application?

How do I submit my application?

To schedule an appointment to submit the application, call 206-296-6797.

What is the timeline for processing a boundary line adjustment?

Decision type 1: 90 days.

For more information