City Building Permits
Milton, WA Building Permit Guide
How to apply for a building permit in Milton, Washington. Permit authority, application steps, fees, and inspection requirements.
Permit Authority
All properties within the incorporated City of Milton.
- Department
- Building Division
- Website
- https://www.ci.milton.wa.us/
Online Permit Portal
Platform: • Account required: No • Submission: In-person only
Application Process
- Submit permit application with required documentation.
- Pay permit fees at time of application (all fees must be paid in full at submission).
- Plan review by Building Official.
- Receive permit upon approval.
- Schedule inspections as required.
Typical processing time: Processing time varies by project complexity.
Source: Building Division
General Requirements
A building permit is required for construction within the City of Milton.
Required Documents
- Completed permit application
- Construction plans and drawings
- Permit validity
- Building permits are valid for 180 days from issuance unless extended.
- Building code
- 2021 Washington State Building Code with amendments.
- Owner-builder
- Homeowners may act as owner-builders; confirm requirements with Building Division.
- Contractor requirements
- All contractors must be registered with Washington State L&I. All permit fees must be paid in full at time of application submission. No permit issued until all costs paid.
Fees
- Plan check fee
- 65% of Building Permit Fee
- Permit fee formula
- Based on valuation using City of Milton Building Division fee schedule. Plumbing permit: $143. Freeway signs (includes building permit): $900.
- Trade permit fee
- $143 plumbing permit
- Reinspection fee
- Charged when work not ready.
- Penalty (no permit)
- $35 processing fee for denied or withdrawn applications
- Payment note
- All fees must be paid in full at time of application submission.
Work That Does NOT Require a Permit
Contact the Building Division to confirm whether your project requires a permit before starting work.
Inspections
How to Schedule
- Building Division (phone)
- Scheduling deadline
- Schedule inspections as required.
- Inspection hours
- Contact Building Division for hours.
- Time windows
- Inspection windows vary by project phase.
Typical inspection sequence: Inspections required at various construction phases.
Contact Building Division for remote inspection options.
Additional Resources
- Building code: 2021 Washington State Building Code with amendments.
- Verify contractor license: WA L&I Contractor Lookup
- License lookup guide: Washington Contractor License Requirements
- Contract template: Washington Homeowner-Contractor Agreement
- Washington hub: Washington Contractor License & Permit Hub
Information on this page was last verified: March 2026. Permit rules and fees change — confirm current requirements directly with the Building Division before applying.
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