If the information on this translated website is unclear, please contact us at 360.902.3900 for help in your language of choice.

Contact us: Private investigators

We no longer offer in-person customer counter service at our Black Lake office. For the quickest service, log in or sign up for online account access.

For questions about:

Getting or renewing your Private Investigative Agency license

Contact: State of Washington Business Licensing Service

Getting or renewing your Armed/Unarmed Private Investigator license or Certified Trainer license

Contact: Department of Licensing Public Protection Services Section

License Status, Regulations, and Business Practices for Private Investigative Agencies, Armed/Unarmed Private Investigators, and Certified Trainers

Contact: Department of Licensing Public Protection Services Section

For complaints only:

Business hours

Monday through Friday
9 a.m. to 4 p.m.

Phone hours

As of March 2022, our customer service hours have changed. This helps us provide better service to you. We have increased our phone hours to the following:

  • Monday – Friday, 9 a.m. – 4 p.m.
Holiday closures
HolidayOffice closed
New Year's DayFriday, December 31, 2021
Martin Luther King DayMonday, January 17, 2022
President's DayMonday, February 21, 2022
Memorial DayMonday, May 30, 2022
JuneteenthMonday, June 20, 2022
Independence DayMonday, July 4, 2022
Labor DayMonday, September 5, 2022
Veterans DayFriday, November 11, 2022
ThanksgivingThursday, November 24, 2022
Native American Heritage DayFriday, November 25, 2022
ChristmasMonday, December 26, 2022
New Year's DayMonday, January 2, 2023

Private investigator agencies

  • Mailing address:
    State of Washington
    Business Licensing Service
    PO Box 9034
    Olympia, WA 98507-9034
  • Physical location:
    Business Licensing Service
    6500 Linderson Way
    Tumwater, WA 98501
    Map and directions

Armed private investigators, unarmed private investigators, and certified trainers

  • Mail forms with payments to:
    Private Investigator Program
    Department of Licensing
    PO Box 35001
    Seattle, WA 98124-3401
  • Mail correspondence with no payments to:
    Private Investigators
    Department of Licensing
    PO Box 9649
    Olympia, WA 98507-9649
  • Physical location
    Department of Licensing
    405 Black Lake Blvd SW
    Olympia, WA 98502
    Map and directions

Overnight mailing (FedEx, UPS, USPS)

Private Investigators Program
Department of Licensing
1125 Washington Street
Olympia, WA 98501

Related information

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