Quinn & Associates Confidential Investigations
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1 of these agencies is based in Westminster; the others serve Westminster from towns including Newport Beach (12 mi), Santa Ana (7 mi) and Orange (10 mi).
9 open 24/7 · 18 open weekends · 23 rated 4.5+ · 9 show a license
Data verified October 16, 2026
The 24 agencies on this page are the private investigators listed for Westminster, CA. What each one states about its license, its specialties and the areas it covers comes from its own website; ratings and quotes come from public reviews.

The 24 agencies on this page are rated from 4.3 to 5.0 across 721 reviews; 5 have 50 or more reviews and 23 are rated 4.5 or higher. When clients rate these agencies on specific qualities, they most often praise professionalism (93%), responsiveness (89%) and quality (85%). The topics that come up most in reviews of the agencies on this page are "communication", "expertise" and "price". 9 are open around the clock; 17 are open on Saturdays and 14 on Sundays. 9 show a license on their websites and 3 have a BBB rating of A or A+. 16 have ten or more years of experience, the longest 34 years. 9 offer urgent consultations; 11 offer a free initial consultation and 1 lists coupons or special offers. 2 have Spanish-speaking staff. We have a website on file for all 24 of the agencies on this page; 21 publish a contact page; 19 list a public email and 1 takes bookings online. We count these figures across the agencies on this page; distances are straight-line, and hours and prices change, so confirm the details with the agency before you book.
All 24 agencies on this page have a website on file. Those pages are where an agency states its license, the kinds of investigation it takes on, and whether it works mainly for attorneys, for companies or for private clients. That last point changes how a report gets written.