Due to recent interim regulations implementing state legislation (effective July 2025) and pending changes to the Design Review program and the local codes implementing State Environmental Policy Act (SEPA) requirements, SDCI's Tips, Director's Rules, and other guidance documents may not reflect the most current regulations or requirements. To ensure accuracy and applicability to specific code questions or permit applications, please contact us through our Send Us a Question website.

Tips

Summary: Washington State law allows adjustments of boundary lines if certain conditions are met. Applications for lot boundary adjustments in Seattle are filed by appointment with the Seattle Department of Construction and Inspections (SDCI) as a Master Use Permit application.

Lot Boundary Adjustment (AutoCAD)

Lot Boundary Form Attachments (PDF)

Note: AutoCAD files are not screen reader compliant. For assistance, contact SDCI's ADA Coordinator.

Date Revised: 07/07/2026

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