City Building Permits

Black Diamond, WA Building Permit Guide

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

Washington King County Updated March 2026

Permit Authority

All properties within the incorporated City of Black Diamond.

Department: Community Development
Address: 24301 Roberts Drive, PO Box 599, Black Diamond, WA 98010
Phone: 360-851-4447
Website: https://www.blackdiamondwa.gov/planning-division/pages/applications-checklists

Online Permit Portal

Open City-specific system (not MyBuildingPermit)

Platform: City-specific system • Account required: Yes • Submission: Online only

Additional resources:

Applications & Checklists

Application Process

Pre-Application Meeting (available and required for some permit types)
Complete forms available online or at Permit Center
Prepare documents (plans and supporting documents)
Submit application online or in-person
Pay fees at submittal
City staff reviews application
Permit issuance upon approval

Typical processing time: Varies by permit type.

Source: Community Development

General Requirements

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

Required Documents

Completed permit application
Site plan
Construction plans
Project specifications

Permit validity: Varies by permit type.
Building code: 2021 Washington State Building Code (adopted 2018 code with updates)
Contractor requirements: Contractors must hold a valid Washington State L&I registration.

Fees

Payment note: Fee estimate provided at pre-application meeting

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

Work That Does NOT Require a Permit

Contact Black Diamond Permit Center for specific exemption information

Important: Forms and tip sheets available on website.

Inspections

How to Schedule

Inspection Line: 360-851-4447 (phone)
Schedule online (if available) (online)

Inspection hours: Monday-Friday, 8:30 AM - 5:00 PM

Additional Resources

Building code: 2021 Washington State Building Code (adopted 2018 code with updates)
Verify contractor license: WA L&I Contractor Lookup
ADU Applications
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 Community Development before applying.

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Navigating permits in Black Diamond 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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