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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

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 Monday May 24, 2021, our customer service hours have changed. This helps us provide better service to you. We have increased the number of staff that will be available for phones calls. We will be able to take calls during these times:

  • Monday: 9 a.m. to 4 p.m.
  • Tuesday: 9 a.m. to 12:30 p.m.
  • Wednesday: 9 a.m. to 12:30 p.m.
  • Thursday: 9 a.m. to 12:30 p.m.
Holiday closures
HolidayOffice closed
New Year's DayFriday, January 1, 2021
Martin Luther King Jr. DayMonday, January 18, 2021
Presidents DayMonday, February 15, 2021
Memorial DayMonday, May 31, 2021
Independence DayMonday, July 5, 2021
Labor DayMonday, September 6, 2021
Veterans DayThursday, November 11, 2021
ThanksgivingThursday, November 25, 2021
Native American Heritage DayFriday, November 26, 2021
ChristmasFriday, December 24, 2021
New Year's DayFriday, December 31, 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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