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Permitting services are available online via this website and For details and information about our location and office hours, see our Customer Service Bulletin.

For new construction, and additions/alterations to existing buildings, including commercial tenant improvements

What requires a permit?


Property Research

Check jurisdiction and zoning to determine whether your property is located in unincorporated King County or is located within city limits.

Find your jurisdiction

step 2

Schedule a pre-application meeting

Pre-application meetings are held between a prospective permit applicant and Permitting Department staff before a permit application is filed.

Pre-application meeting packet

step 3

Download application materials

Find and download the application materials that align to your project on our permit application forms listed by packet page, including the following:

  • Commercial Construction
  • Commercial Tenant Improvements
  • Commercial Signs
  • Commercial Cellular Communication Facilities
  • Commercial, Mechanical - available on
step 4

Plan Review

King County will review the application to ensure code compliance and safety requirements.

step 5


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

Department of Local Services, Permitting Division
919 SW Grady Way, Suite 300
Renton, WA  98057

In-person customer service is by appointment only.

To reach customer service, call 206-296-6600 during the following call center hours:
9-11 a.m. and 12:30-2:30 p.m., Mon, Tues, Thurs, Fri