Weather and road conditions may affect some of our licensing locations. Be sure to check the status of your local office before you go.

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

Our Customer Service Counter has moved. The counter is located at 405 Black Lake Blvd, Olympia, WA 98502. Map and driving directions (google.com)

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:

Office hours

Monday through Friday
8:30 a.m. to 4:30 p.m.

Holiday closures
HolidayOffice closed
New Year's DayWednesday, January 1, 2020
Martin Luther King Jr. DayMonday, January 20, 2020
Presidents DayMonday, February 17, 2020
Memorial DayMonday, May 25, 2020
Independence DayFriday, July 3, 2020
Labor DayMonday, September 7, 2020
Veterans DayWednesday, November 11, 2020
ThanksgivingThursday, November 26, 2020
Native American Heritage DayFriday, November 27, 2020
ChristmasFriday, December 25, 2020
New Year's DayFriday, January 1, 2021

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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Access Washington – official state government website