New construction on private property will require a Department of Planning and Development (DPD) Construction Permit. When a Construction Permit application includes work within the street right-of-way, the Seattle Department of Transportation (SDOT) will review and must approve the work to be permitted. Depending on the scope and type of construction required the applicant may need to get their SDOT permit(s) at the time they are getting their Construction Permit. Refer to Section 2.10.

Grading Regulations and Permitting: Grading activity, whether or not it requires a permit or approval from the City, must comply with the provisions of the Stormwater, Grading and Drainage Control Code (SGDC). The following guidance applies:

• Separate Grading Permits issued by DPD are required for work on private property when the work is not associated with a Building Permit.
• When grading is associated with a Construction Permit, grading review and approval become a component of the Construction Permit and a separate Grading Permit is not required.
• Grading review takes place only when the thresholds referred to in the DPD Client Assistance Memo 502: Grading Regulations in Seattle are exceeded. DPD administers the grading and drainage provisions of the SGDC for work on private property when part of a Building or Grading Permit.

When documentation exists or it is suspected that hazardous materials will be encountered at the site, known information concerning the nature, occurrence, and the extent of the contamination shall be included in the Environmental Checklist.

Refer to the Building and Alley Grade Sheet to determine appropriate grades for a project.