L&B Services
“Blanca and Maria really know what there doing 🙂 I'm glad I came to this place for help on my custody order 🙂”
Best Private Investigators near South El Monte, CA
These agencies serve South El Monte from nearby bases in towns including Pasadena, Los Angeles and Monterey Park.
15 agencies listed · 3 open 24/7 · 9 open weekends · 13 rated 4.5+ · 3 show a license
Data verified October 17, 2026
Larsen Kristine
“Best Private Investigator in LA County!”
Sunset Blvd. Investigations
“Both these people really cared about my ordeal and went above and beyond to help me, and I cannot speak highly enough about the integrity and honesty they both continue to show even when not expecting it”
Paramount Investigative Service
“I requested their services in order to locate someone for a very urgent matter, and they were really reactive and efficient.”
MCM Investigations
“The results concerning my situation were fast and effective !!”
California Recovery Investigations
“Was very discreet, thorough and professional, as well as polite and conscientious about the sensitivity of the work needed.”
The 15 agencies on this page are the private investigators listed for South El Monte, 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.
Area overview: South El Monte, CA
13 of the 15 agencies on this page have a rating, from 4.5 to 5.0 across 369 reviews; 3 have 50 or more reviews. 3 are open around the clock; 9 are open on Saturdays and 7 on Sundays. The services the agencies on this page list most often on their websites are surveillance (3), background checks (2) and missing persons (2). 3 show a license on their websites and 5 have a BBB rating of A or A+. Domain records put 7 websites of the agencies on this page at ten or more years old; the oldest dates from 2001. 3 offer urgent consultations and 4 offer a free initial consultation. 1 has Spanish-speaking staff. We have a website on file for 13 of the agencies on this page; 9 publish a contact page; 5 list a public email and 1 takes bookings online. We count these figures across the agencies on this page; hours and prices change, so confirm the details with the agency before you book.
Do investigators listed for South El Monte discuss a case free?
4 of the 15 agencies state that a first consultation costs nothing. Use it to describe the problem and hear whether the work can be done lawfully at all. A straight agency will sometimes tell you on that call that what you want cannot be obtained, which saves you a retainer.
Excaliber Investigations
“Reliable, trustworthy and highly recommended investigated service.”
Rush Intel Services
“Would not hesitate to use them again for process of service.”
Schubert Investigations
“I highly recommend this private Investigator who is the best…”
Applied Facts
Kale Investigation Agency
“I am grateful for my time there.”
Bert Porter & Associates
“I am sure that I have prevailed on cases where I utilized the service, largely due to the material discovered during the investigation.”
G.G. & Associates Investigation Firm
“Gregg helped my brother in a case , he was able to get him out with the footage evidence he got from a business, lawyers are good but they are not going to leave their office to go search for info.”
Diversified Risk Management
Professional Solutions
Why these companies made our list
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