Find a Licensed Private Investigator in Washington

01Why Washingtonians hire investigators

When a Washington matter needs a licensed investigator

Washington requests tend to start with a question the client cannot settle alone. A parent in a Snohomish County parenting plan dispute wants to know whether the other parent is drinking before pickups. A Bellevue software company suspects a former employee is soliciting clients in breach of an agreement. A family in Spokane has lost touch with a brother who moved to the coast. A self-insured employer in the Tri-Cities doubts the limits described in a workers' compensation claim. Each one calls for facts gathered lawfully and written up so an attorney, judge or claims manager can rely on them.

Washington regulates that work under Chapter 18.165 RCW. A private investigator agency, as the statute defines it, is in the business of detecting, discovering or revealing crimes, the identity, conduct or whereabouts of people, the location of lost or stolen property, the cause of fires and accidents, and evidence for use in court or other proceedings. Individual investigators must be licensed and employed by a licensed agency. So the first step is confirming who holds a current license, not which listing appears first in a search.

• Family law: parenting plans, dissolution and protection order matters
• Civil litigation: witness locates, statements and asset research
• Insurance and workers' compensation claim reviews
• Business concerns: non-compete issues, employee theft and fraud
• Personal safety: documenting harassment for counsel or police

02Licensing

How licensing works for a private investigator in Washington

The Washington State Department of Licensing administers Chapter 18.165 RCW and its rules. Licensing has layers. A business that offers investigations must hold a private investigator agency license and designate a principal who has passed the department's examination. Each person doing investigative work must hold an individual private investigator license, and RCW 18.165.030 ties that license to employment with, or an offer from, a licensed agency, along with age, fingerprint and background requirements. Investigators who carry a firearm on the job need a separate armed private investigator license and a firearms certificate.

RCW 18.165.150 sets out the penalties. Performing the functions and duties of a private investigator without a license is a gross misdemeanor, and so is owning or operating an investigator agency without an agency license or employing someone for investigative work who lacks a permanent license. Using vehicles or equipment that suggest a police affiliation is also barred. The statute lists exemptions in RCW 18.165.020, such as an employee investigating only for a single employer that is not an agency, and an attorney acting within the practice of law.

Washington also controls how licensees advertise. RCW 18.165.080 requires advertising by a licensee to show the name, address of record and license number as they appear in the department's records, which gives clients an easy cross-check. Out-of-state investigators on temporary assignment may not solicit business in Washington or represent themselves as licensed there. Program details are on the Department of Licensing private investigator page.

03Legal limits

What licensed Washington investigators can and cannot do

A Washington license allows investigative work for pay. It does not grant police powers. A licensed investigator cannot arrest, search, compel statements or enter private property without permission. Most work comes from public places, public records, lawful data sources and voluntary interviews. Recording is where Washington is strict. RCW 9.73.030 makes it unlawful to record or intercept a private communication by phone or other device, or a private conversation, without first obtaining the consent of all participants.

The same statute treats consent as obtained when one party announces to everyone, in a reasonably effective manner, that the conversation is about to be recorded, and the announcement itself is recorded. In practice, careful Washington investigators rely on notes, photographs and video from public vantage points and get legal advice before capturing any audio. Tracking devices are also addressed. Washington's stalking statute, RCW 9A.46.110, covers knowingly installing or monitoring an electronic tracking device to follow another person's location without consent, in circumstances that would cause reasonable fear or distress.

Repeated following or monitoring of a person can also fall within that stalking law, which is why professional surveillance is planned, time-limited and documented. Federal law separately bars pretexting for bank or phone records and restricts access to motor vehicle records. An attorney can confirm how these rules apply to a specific case before any work begins.

• Generally lawful: observation and video from public places
• Generally lawful: public records research and voluntary interviews
• Restricted: recording a private conversation without every participant's consent
• Restricted: placing or monitoring a tracking device without consent
• Not allowed: posing as police or using pretexts for bank or phone records

04Regions

Why local knowledge matters across Washington

The Cascades split Washington into two very different places, and the side of the mountains where a matter happens shapes the work. The Puget Sound region from Everett through Seattle and Bellevue to Tacoma and Olympia is dense, congested and connected by ferries, bridges and toll lanes. A surveillance day in King County can be lost to a single closed ramp, and ferry schedules decide how a case on Bainbridge, Vashon or Whidbey Island is staffed. Clark County, across the Columbia from Portland, often involves Oregon addresses and courts as well.

East of the mountains, distances and winter conditions take over. Snoqualmie, Stevens and White passes can slow or close, and towns such as Yakima, Wenatchee, Moses Lake, the Tri-Cities, Walla Walla and Spokane are separated by long highway stretches through farm and orchard country. Whatcom County shares busy border crossings with British Columbia, and the Olympic Peninsula and coast are rural, wet and sparsely served. Superior courts are organized into 32 judicial districts, with some rural counties sharing judges.

Washington has 29 federally recognized tribes, including the Yakama Nation, the Tulalip Tribes and the Puyallup Tribe, with reservations from Puget Sound to the eastern plateau. Jurisdiction on tribal land can differ from the surrounding county, so an investigator working nearby should raise it early and the client's attorney should weigh in. Requests sent through Delator Group are matched by county for these reasons.

05Pricing

How Washington investigators usually price their work

Every investigator sets and quotes their own fees, and the right structure depends on the assignment. Surveillance and field work are usually billed by the hour, often with a minimum block per day so that a short shift still covers travel. Mileage, tolls, ferry fares and travel time are commonly added when the work is away from the investigator's base, which matters in a state where a case may involve both Seattle and Spokane. Database searches, records requests and court copies are typically passed through as expenses.

Many investigators ask for a retainer, bill against it and refund or invoice the balance at the end. Some quote a set price for a narrow task, such as one records search or a defined background report. Ask what the quote covers, how often you will receive updates, whether report writing and video editing are billed separately, and what happens if a planned surveillance day produces nothing. A written agreement that answers those questions protects both sides.

06Before the first call

How to prepare for the first conversation with an investigator

A good first call is short and specific. Write down what you need to learn, why it matters and what you will do with the answer. If a case is open, have the case number, the superior court and county, your attorney's contact details and any hearing dates. For a person, gather the full name, date of birth if known, last known addresses, vehicles, employer, a recent photo and the usual routine. For a business concern, collect the documents that raised the question and the names of the people involved.

Expect the investigator to ask questions that test whether the goal is lawful and realistic. A licensed investigator will decline work that looks like an attempt to harass someone or to find a person who has a good reason to stay hidden, and may ask to see court papers in parenting plan or protection order matters. Mention anything that affects safety, such as weapons, past violence or an existing order. The more accurate the picture, the more accurate the quote. When you are ready, send a short request with the county and the goal.

• Your goal, in one or two sentences
• County and city where the activity happens
• Names, dates of birth, addresses and vehicles you already know
• Case number, court and attorney contact, if any
• Budget range and any hard deadline

Cities

Top 20 cities in Washington for private investigator requests

These are Washington's 20 largest incorporated cities by the Census Bureau's July 2025 population estimates, with the county that holds each one. Large unincorporated areas, such as South Hill in Pierce County, are not on the list but still generate many requests. The street address or ZIP code tells an investigator which superior court and sheriff matter, so include it when you send a request.

Counties

Top 20 Washington counties for investigator requests

Washington has 39 counties. Each has a superior court, though several small counties share judicial districts, for a total of 32 districts. The 20 below are the most populous by 2025 estimates, from King County on Puget Sound to Mason County on Hood Canal. Investigators who work these counties regularly know the clerks, records systems and local court habits.

Investigation types

Investigations licensed Washington investigators handle

These are the request types Delator Group most often refers to licensed Washington investigators. Each investigator decides what work to accept and how to carry it out. The descriptions below explain what the work generally involves under Washington law, so you can explain your need clearly when the investigator calls.

• SurveillanceA licensed investigator observes and video-records activity from public places, keeps a time-stamped log and writes a report. Washington's all-party consent law means audio is usually left out.Learn more
• Parenting plan investigationsInvestigators document conditions during residential time, a parent's conduct and who is present, giving a family law attorney observations to weigh before a superior court hearing.Learn more
• Infidelity investigationsWashington dissolution is no-fault, but conduct can still matter to parenting plans or the use of community funds. An investigator gathers lawful observations an attorney can evaluate.Learn more
• Locating peopleInvestigators find witnesses, heirs, debtors and relatives through public records, licensed data sources and field checks, within federal limits on phone, bank and driver records.Learn more
• Background researchInvestigators review court, property and business records on a person or company. Reports used for employment, tenant or credit decisions fall under the federal Fair Credit Reporting Act.Learn more
• Asset searchesInvestigators trace real property, vehicles, business filings and liens through county and state records to support collections, judgment enforcement or division of community property.Learn more
• Insurance and workers' comp claimsFor carriers, self-insured employers and defense counsel, investigators compare claimed limitations with observed activity and interview witnesses, all from lawful vantage points.Learn more
• Corporate and employee mattersInvestigators help counsel look into employee misconduct, vendor fraud and possible breaches of non-solicitation agreements, coordinating with forensic examiners when devices are involved.Learn more

How matching works

How investigator matching works in Washington

1. 01

   Send your request

   Use the contact form or call. Describe what you need, the county and city, any deadline and how you prefer to be contacted. Keep sensitive details brief until you speak with the investigator.

2. 02

   Request review

   Delator Group reviews the request for completeness and lawful purpose and may ask a short follow-up about location, timing or whether a court case is open.

3. 03

   Referral to a Washington investigator

   The request is referred to an independent investigator who holds a Washington license and works in or near the county involved, so local courts, ferries and passes are familiar.

4. 04

   The investigator contacts you

   The investigator calls or emails, discusses scope and method, quotes their own fee and, if you decide to proceed, signs a written agreement with you directly.

5. 05

   You verify and decide

   Before you sign, look up the investigator and the agency in the Department of Licensing license lookup. There is no obligation to hire, and the choice stays with you.

Licensing

How Washington licenses private investigators

Washington licenses both the agency and the person. A business that provides investigations needs a private investigator agency license with a principal who has passed the state examination, and each investigator needs an individual license tied to a licensed agency. Armed investigators carry an additional license. All of these records sit with the Department of Licensing, and checking them online takes a few minutes, which is the simplest protection a client has.

Before you hire

What to check before you hire an investigator in Washington

FAQ

Frequently asked questions

Nationwide

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