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Boundary or lot line adjustment - Land use permit process

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.

Important information

Keep final plans and permits displayed on-site

Approved building, fire 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.

About

A Boundary Line Adjustment or BLA 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. See also Affidavit of Correction and Subdivisions.

BLAs are administered by the Department of Local Services, Permitting Division (Permitting). Legal authority Chapter 19A.28 (minor adjustments) of the King County Code covers this permit.

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

Cost and timeline

Check the current fee schedule for an estimate of costs

The timeline is 90 days for processing the plan.

Applications

Use our boundary line adjustments packet found below, or on our Permit forms, application materials, and resources page.

The Boundary Line Adjustment application is available online through MyBuildingPermit.com.

Schedule a land use inspection

King County inspects work to ensure code compliance and safety requirements.

Learn more about scheduling inspections

Boundary Line Adjustments

Handouts

Boundary Line Adjustment Permit

Checklist

Boundary Line Adjustment: Procedures Following the Approval Process

Information

Residential Building Permit Agencies, Who does what

Information

Legal Lot Status

Proof of Legal Lot Information

Legal Lot Status Determination Service

Application

Boundary Line Adjustment: Title Page Template

See, Computer Aided Design (CAD) Templates and Other Data Resources packet

Property Research Guide and Worksheet

Information

Worksheet

Forms

Boundary Line Adjustment Permit

Available on MyBuildingPermit.com 

Critical Areas Compliance Affidavit

Form

Boundary Line Adjustment Owner Information

Form

Applicant Status

Individual

Public Agency, or Public Utility or Private Utility

Corporation or Business Association

Boundary Line Adjustment: Seattle - King County Public Health Department

Application for Review of Boundary Line Adjustment or Rezone

Application

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