Development Costs

New Construction or Additions

For new commercial buildings, new single family residential homes, any additions, decks, and new accessory buildings, the cost of the permit is based on the square footage and type of construction of the project. For a fee quote you may contact Permit Services at 425-806-6400 or you may download a fee quote form and fax it to Permit Services at 425-806-6130 including your return fax number. We will complete your fee quote and return it to you within one week of receiving the request.


For tenant improvements, single family remodels not adding square footage, signs, commercial re-roofs, portable structures, detention vaults, retaining walls and personal wireless buildings, the cost of the permit is based on the valuation of the project. For sign permits and retaining walls, a separate valuation is required for each. The valuation is determined by the cost of the project including tax.

Additional Fees

Additional fees may apply to your project. See information forms A (Building Fees) (PDF), D (Development Review Billing) (PDF), and E (Public Works Fees) (PDF), Commercial/Multi-Family Plumbing/Mechanical Fees (PDF):