City Building Permits

SeaTac, WA Building Permit Guide

How to apply for a building permit in SeaTac, Washington. Permit authority, application steps, fees, and inspection requirements.

Washington King County Updated March 2026

Permit Authority

All properties within the incorporated City of SeaTac.

Department: Permit Center Division (Community and Economic Development)
Address: SeaTac City Hall, Floor 3
Phone: 206-973-4750
Email: permittechnicians@seatacwa.gov
Website: https://www.seatacwa.gov/how-do-i/apply-for/a-permit

Online Permit Portal

Open SeaTac LAMA Portal

Platform: SeaTac LAMA Portal • Account required: Yes • Submission: Online only

Additional resources:

Planning Email

Application Process

Access LAMA portal at https://lama.seatacwa.gov
Create new user account
Complete online application forms
Upload electronic plans (PDF format, follow General Standards for Electronic Documents)
Pay fees online
Application routed to appropriate departments
Receive electronic permit notification upon approval

Typical processing time: Varies by permit type.

Source: Permit Center Division (Community and Economic Development)

General Requirements

A building permit is required for most construction within the City of SeaTac.

Required Documents

Completed permit application
Site plan
Electronic plans (PDF format per General Standards)
Construction specifications
Architectural plans

Permit validity: Varies by permit type.
Building code: 2021 Washington State Building Code
Contractor requirements: Contractors must hold a valid Washington State L&I registration.

Fees

Payment note: Payment through portal

Fees change. Verify current amounts at the official fee schedule (effective Current).

Work That Does NOT Require a Permit

Per state building code exemptions

Important: Contact Permit Center for specific questions about exemptions.

Inspections

How to Schedule

Customer portal (online)

Scheduling deadline: Requests received before 5:00 PM scheduled for next business day
Inspection hours: Monday, Tuesday, Thursday, Friday: 9:00 AM - 4:00 PM; Wednesday: 10:00 AM - 5:00 PM

Typical inspection sequence: Permits and approved plans required on-site

Additional Resources

Building code: 2021 Washington State Building Code
Verify contractor license: WA L&I Contractor Lookup
Planning Email
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 Permit Center Division (Community and Economic Development) before applying.

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Navigating permits in SeaTac can be complicated.

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Important: This page is an educational resource provided by jaspector.com. It is not legal advice, and it does not substitute for official guidance from the permit authority listed above. Permit requirements, fees, and processes change frequently. Always verify current requirements directly with the issuing department before beginning any construction project. Use of this page does not create an attorney-client relationship. Jaspector assumes no liability for any outcomes arising from reliance on this information.

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