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Commercial and multi-family permit process - Building and land use

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

Important information

Keep final plans and permits displayed on-site

Approved building, fire and land use permits must be displayed prominently on construction and development sites. 

Maintaining these records on-site is the responsibility of the applicant and/or contractor.

Apply for a commercial and multi-family permit

  • Property research

    Use our property research and maps to check jurisdiction and zoning to determine whether your property is located in unincorporated King County or within city limits.
  • 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.

  • Download needed applications

    Find and download the application materials that align to your project on our permit application forms listed by packet page.

    Commercial, mechanical forms are available on the MyBuildingPermit website.

  • Plan review

    We perform a review of the application for code compliance and safety requirements.

    Permit review timelines

    Find your permit fee schedule

  • Set up inspections

    We inspect work for code compliance and safety requirements.

Pre-Applications


Pre-Application Meeting Request

Information (234KB)


Pre-Application Meeting Requests and Waivers

Information (180KB)


Pre-Application Waiver Request

Application (148KB)


Commercial Construction


Bulletin 8: Commercial and Multi-Family Building Permits

Form (156KB)


Application, permit; Applicant Affidavit

Form (728KB)


Approval of Building Permit Application; Seattle - King County Public Health Department

Application for Approval of Building Permit


Applicant Status

Individual (1.06MB)

Public Agency, or Public Utility or Private Utility (1.06MB)

Corporation or Business Association (1.05MB)


Energy Code Worksheets for Commercial Construction

Building Envelope Summary

Lighting Budget Calculation Form


Landscape Bond Quantity Worksheet Form

Form (59KB)


Residential Density Calculation

Worksheet (PDF) (138KB)

Worksheet (MS Word) (100KB)


SEPA Checklist

Information (212KB)


SEPA Greenhouse Gas Emissions

Worksheet Instructions (182KB)

Worksheet (spreadsheet) (211KB)


SEPA Only Submittal Process

Information (176KB)


Sewer Availability

Certificate of Sewer Availability (200KB)


Site Areas Worksheet

Worksheet (144KB)


Site Plan and Temporary Erosion and Sediment Control (TESC) Template and Example

See, Computer Aided Design (CAD) Templates and Other Data Resources packet


Solar Photovoltaic Systems, Incentives and Permitting Guidance

Information (235KB)


Water Service Requirements

Information (867KB)


Commercial Structure Additions


Permit Guide, Commercial Additions

Commercial Additions Application Guide (281KB)


Water Service Requirements

Information (867KB)


Commercial - Tenant Improvements

Energy Code Worksheets for Commercial Construction

Building Envelope Summary

Lighting Budget Calculation Form


Tenant Improvement

TI Application Guide (241KB)


Sewer Availability

Certificate of Sewer Availabilty (200KB)


Site Plan and Temporary Erosion and Sediment Control (TESC) Template and Example

See, Computer Aided Design (CAD) Templates and Other Data Resources packet


Water Service Requirements

Information (867KB)


Commercial - Sign


Bulletin 8: Commercial and Multi-Family Building Permits

Form (156KB)


Sign Permits

Checklist (246KB)


Site Plan and Temporary Erosion and Sediment Control (TESC) Template and Example

See, Computer Aided Design (CAD) Templates and Other Data Resources packet


Cellular Communcation Facilities


Cellular Communication Antenna and Tower Applications

Available on MyBuildingPermit.com


Cellular Communication Antenna and Tower

Checklist (235KB)


Cellular Communication Antenna and Tower - Supplemental Information

Form (601KB)


Site Areas Worksheet

Worksheet (144KB)


Landscape Bond Quantity Worksheet Form

Form (59KB)


SEPA Checklist

See, State Environmental Policy Act (SEPA) Process packet


Site Plan and Temporary Erosion and Sediment Control (TESC) Template and Example

See, Computer Aided Design (CAD) Templates and Other Data Resources packet


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