Boundary or lot line adjustment

What is the purpose of a boundary line (lot line) adjustment?

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

A boundary line adjustment allows 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.

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.

How much will it cost?

See DDES' current fee schedule for an estimate.

Where can I get an application?

• Refer to the boundary line adjustments packet for application materials
• Request an application packet by mail by calling DDES customer service at 206-296-6600 or
• Pick up an application packet at DDES in Renton (see map and directions)

How do I submit my application?

To schedule an appointment to submit the application, call 206-296-6797. See Applying for a permit at DDES for more information.

What is the timeline for processing a boundary line adjustment?

Decision type 1: 90 days.

Notes / Comments

For more information:

• Type 1-4 Applicant Designation 
• See fee information for subdivisions
• See FAQ

Legal authority

Chapter 19A.28 (minor adjustments)* of the King County Code

Administered by

DDES Land Use Services Division

Contact

For questions, please contact DDES customer service at 206-296-6600.

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To request this information in alternate formats for people with disabilities, call 206-296-6600 or TTY Relay: 711.