Thornhill's Leading Private Investigation Agency

Thornhill's #1 Private Investigation Agency

We are an Award-Winning Private Investigation Agency serving Toronto, Mississauga, Oakville, Vaughan, the GTA and the Province of Ontario. Built on trust, expertise and integrity, Star Quality Private Investigations® Toronto is a full service firm for over two decades. Our investigative team is comprised exclusively of male and female former law enforcement detectives, sergeants and executives. Our ability to produce superior, confidential results while maintaining a dedication to your privacy, has elevated us to a nationally recognized and respected brand that individuals, corporations and legal teams can count on.


Whether you’re a business owner concerned that the integrity of your business operations may be compromised by an employee, or an individual crippled with doubt over suspicious of infidelity in your relationship, you don’t have to suffer in silence. With roots in the Greater Toronto Area, we have for over 3 decades been helping businesses, individuals and families find answers and clarity through our leading Private Investigation Services.

What sets us apart? An unparalleled dedication to compassionate service, and the delivery of customized, turn-key solutions for every investigative matter. To us, you’re not just another case number; here’s how we’ll prove it:

What is the Star Quality Difference?

Exceptional Expertise, Customized Approaches, Confidential Results, Total Transparency.

Our Thornhill Private Investigators hold a 99.9% success rate in securing high-quality evidence for our clients. The secret to these WINNING RESULTS is a team with unmatched industry experience, a commitment to personalized service, and a promise to work faster, and harder, for you!

When you choose Star Quality Private Investigations® Thornhill Team for your Family Law or Corporate Investigation, you’re benefit from the specialized expertise of Ontario’s Best and Brightest Private Investigation Rockstars. All Private Investigators within our agency are former law enforcement professionals with a highly refined set of investigative skills, ranging from digital forensics to mobile surveillance tactics.

As part of our approach to Private Investigations in Thornhill, we maintain an unequivocal focus upon you, the Client! Understanding that many of our clients approach us during period of immense stress and uncertainty, we are committed to managing each case with the utmost Compassion, Expertise, Guidance, and Empathy. Your highly personalized Investigation and Risk Management Plan is developed within a few hours of initial contact and initiation of our services, and is based on your unique goals, budget, and timeline.

Even the smallest of details can make a big difference, so our case workers and Private Investigators are Meticulous and Communicative at every step of your investigation; two factors that we believe lead to consistent, successful outcomes for our clients.

Watch Your Investigation Unfold Before Your Eyes

Imagine riding shotgun with your Private Investigator? We’ve made it possible, thanks to our Exclusive Investigation Live Feed Updates, keeping our Thornhill clients abreast of every critical facet of your investigation, in real time. You’ll know when your service has been initiated, when our subject changes location, each time evidence is secured, and of course, if your suspicions are confirmed.

Family Law Investigation Experts

Our Thornhill Private Investigators specialize in the niche realm of divorce and child custody private investigations, helping you secure professional evidence to reach a fair and favorable settlement faster, and in the best interest of your family.

Our Family Law Investigations are also critical tools in helping those navigating situations involving infidelity, substance abuse, fraud, hidden assets, and other legal issues involving family or loved ones.

Corporate Investigation Partners

Our Corporate Investigation Experts are proud to have supported hundreds of Fortune 500 Corporations, Law Firms, Local Businesses and Start-Ups with corporate investigation services involving fraud, WSIB investigations, theft, sabotage, or criminal/questionable behaviour.

Our Private Investigators can also serve as “Undercover Bosses” to expose inefficiencies or integrity issued within your business operations.

GPS Tracker Rental & Purchase

As one of few licenced dealers in Thornhill, SQPI sells and rents accurate and discreet GPS trackers to monitor the movement of a person or vehicle/property.
Our state-of-the-art tracking devices are an ideal solution to track the whereabouts of a loved one or employee if infidelity, questionable behaviour or substance abuse is suspected.

Background Checks

Our background check services offer individuals and businesses across Thornhill the opportunity to reveal concealed information or records to help you make informed decisions about an individual in question. These deep investigative searches are highly effective, particularly when the person of interest is a current or potential spouse/partner, a family member, a co-worker, an employee or employer, a future business partner, or a child or senior caregiver. Want to learn more about our full service offering in Thornhill? Explore the many ways in which our Team of Private Investigation Experts are dedicated to securing the answers you need – fast! All evidence secured by our team through any of our leading services is time-stamped and professionally presented to be used within a court of law, or any other government body. Courtroom evidence provided by our team may include date & time-stamped video and still photography, live witness testimony, written reports, and affidavits.

Rates That Feel Right

While the quality of our services is unrivaled, we also strive to make our rates as affordable and accessible as possible, because you shouldn’t have to break the bank for the answers you deserve. As a boutique firm, we are flexible enough to find a personalized approach that works within your budget.

We are proud to be the ONLY AGENCY WITHIN THE GTA WITH AN ALL-INCLUSIVE HOURLY RATE for surveillance and investigative services, and we never charge for extras that arise throughout your investigation. This hourly rate includes a senior private investigator, kilometers, gas, mileage, supplies, equipment as well as a USB of all high resolution 4K video and photography evidence.

Additional services such as GPS Rental, Background Checks, Asset Searches, Employment Verification, Person Locates and Skip Tracing are offered at a flat discounted rate when booked tandem with surveillance.

Trusted. Respected. Confidentialtity & Providing Results Is The Core Of Our Business.

As industry leaders, Star Quality Private Investigation Thornhill provides every client with evidence they need and want to move through their current situation. We built our Expert Investigation Team’s reputation by providing fast, accurate answers in an economical manner.

Call us now at 416-884-5100 to get a free, no-obligation quote for all your private investigative needs..

We are located at 1000-10 Four Seasons Pl, Thornhill, ON M9B 6H7, Canada. Contact our Elite Private Investigations Team to book an appointment today.

Choose Expertise. Choose Excellence. Choose Results.