Commercial Permit Info & Forms

The Building Department requests all permit application documents also be submitted electronically via thumb drive.

Appointments may be scheduled for building permits. Scheduled submittal appointments will take priority over walk-in submittals. 

Walk-in building permit submittals are still accepted.  

Commercial Permit Process

Many commercial projects often involve land use permitting processes. As many of these can be complex, a pre-application is typically required for commercial development. Please contact a planner at 206-780-5270 to schedule your appointment.

In order to help our customers with the permitting process, the Building Division has created checklists and informational forms and brochures which clearly explain the requirements to apply for a permit.

If you are proposing to do only mechanical or plumbing work, complete the appropriate application below:

If you still have questions please call us at 206-780-3796.

New Commercial Structure

A Building Permit Application (PDF) is required to allow the construction of a new commercial structure. Look over the New Commercial Structure Checklist (PDF) in order to assist you in preparing and submitting a completed application.

Tenant Improvement

Tenant improvement projects are interior renovations to an existing commercial structure. They may also require separate permits for Fire Code Compliance. Before the Building Permit Application (PDF) is sent, take a moment to review the Commercial Tenant Improvement Checklist (PDF).

Related Permits

Related Forms & Brochures

Forms without hyperlinks have not been updated to reflect current codes. For questions regarding specific requirements please contact the Building Division at 206-780-3796.