Grading Code

See also: Grading Permit, Grading Season Extensions, Side Sewer Code, Stormwater Code

What Is It?

Our Grading Code is designed to protect the graded site and adjoining property, preserve natural drainage patterns and watercourses, and control pollution. All grading activity must comply with the code, whether or not it requires a permit or approval from us. The code applies to:

  • Permanent and temporary grading
  • Land-disturbing activities such as replacement of impervious surface (surface that sheds water)
  • Maintenance and protection of grades, slopes, and soil stability

Our code requires that you protect adjoining property, control erosion, and install fencing, boundary designation, and temporary stockpiling during grading activity. The code also specifies when we require permit or approval for grading activity.

Read the Code

Construction and Inspections

Nathan Torgelson, Director
Address: 700 5th Ave, Suite 2000, Seattle, WA, 98104
Mailing Address: P.O. Box 34019, Seattle, WA, 98124-4019
Phone: (206) 684-8600
Phone Alt: Violation Complaint Line: (206) 615-0808
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SDCI issues land use, construction, and trade permits, conducts construction and housing-related inspections, ensures compliance with our codes, and regulates rental rules. SDCI is committed to an antiracist workplace and to addressing racism through our work in the community.