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Grading 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 doesn’t shed 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

Proposed Changes

City Council is expected to vote on our proposed 2014 Seattle Grading Code on Monday, October 20. Our proposed changes will likely take effect in late November.

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