The Building Division protects the public health and safety by ensuring that all structures are built in accordance with adopted building codes.  This Division provides information to the public on building code requirements, reviews and approves building plans, and performs a complete range of building services including plan check review and inspections services for all required codes, including building, plumbing, mechanical, energy, barrier free, and building heights.

The Building Division also investigates complaints regarding illegal or unsafe structures and when necessary, initiates code enforcement orders against violators. To submit a complaint, please visit the Code Compliance webpage.

Washington Labor & Industries conducts electrical system plan checks and inspections.

Building Permit Application

Permit Applications can be found at our Online Permit Center. If you are unable to download the application online or need additional information, call (425) 263-8000.

Submitting Plans

A least two (2) legible sets of plans with a minimum of 1/4″ per foot scale need to be submitted.

Typical Plan Review Time on Construction Drawings

Once the Building Division receives the drawings, the review can be 4 to 6 weeks depending on work load and complexity of plans.

Current Building Codes in Effect

The current building codes have been adopted under Title 15 of the Mukilteo Municipal Code. Local and state amendments apply.

  • 2018 International Residential Code (IRC)
  • 2018 International Building Code (IBC)
  • 2018 International Mechanical Code (IMC)
  • 2018 International Fire Code (IFC)
  • 2018 Uniform Plumbing Code (UPC)
  • 2018 Edition of the International Energy Conservation Code/Washington State Energy Code (also see Chapters 51-11C and 51-11R WAC)
  • Washington State Energy-Related Building Standards (see Chapter 19.27A RCW)
  • ICC A117.1-2009 (Accessibility Code)

These codes are available to view at City Hall.

Building Permit Inspection Requests

Building inspection requests must be made by 3:00 pm the day prior to the requested inspection date. Please email or request an inspection via our online portal. We are currently providing inspections Monday – Thursday. Requests for morning or afternoon inspections will be honored if possible, but cannot be guaranteed.


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