Commercial Building Permits
Commercial Building permits are needed for the following buildings and structures:
- Commercial Buildings (new and additions)
- Multifamily Housing Units (Apartment Buildings, Condominiums, and Townhomes)
- Tenant Improvements
- Antennas
- Personal Wireless Telecom Facilities
- Signs and Billboards
- Retaining Walls
Permits may be required for mechanical, plumbing, and fire systems in commercial buildings. These include:
- Plumbing (fixtures, water heaters, drains)
- Mechanical (appliances, ventilations, heating/cooling systems)
- Fire Alarms Systems
- Fire Sprinkler Systems
- Fire Pumps
- Underground Supply Main (Fire)
- Gates or Barricades across fire apparatus access road
- Marijuana Extraction Systems
To apply for any of these permits, go to MyBuildingPermit.com. For more information on how to apply online, see the information on the following page: Online Permitting | Snohomish County, WA - Official Website (snohomishcountywa.gov).
Commercial Building Permit Submittal Checklist (PDF)
Supplemental - Urban Residential Design Standards (30.23A)
Landscape Plan Submittal Checklist (PDF)
Tree Canopy Ordinance Highlights (PDF)
Tree Canopy Calculation Sheet (PDF)
Building Code Summary Worksheet (PDF) (Commercial, Industrial, & Mixed Use Occupancies)
Land Disturbing Activity Forms (Grading, Clearing, & Drainage)
Commercial Pre-Application Review (PDF)
Application & Ownership Authorization (PDF)
Applicant's Guide - Commercial Sign Applications (PDF)
Fire Systems Application (PDF)
Commercial Kitchen Hood Worksheet/Checklist (PDF)
Application Form (PDF) (Updated May 20, 2018)
Personal Wireless Service Facilities Submittal Checklist (PDF)