View Profile
Best Private Investigators near Northbrook, IL
1 of these agencies is based in Northbrook; the others serve Northbrook from towns including Chicago (22 mi), Evanston (9 mi) and Park Ridge (9 mi).
6 open 24/7 · 12 open weekends · 16 rated 4.5+ · 10 show a license
Data verified October 21, 2026
View Profile
Carlson Investigations
- Defendant
- Sheriff
- Process Server
“I couldn't get my tenant served for months because he kept dodging other process servers but then I hired William and he got inventive and served my tenant in a day.”
View Profile
On Q Professional Investigations
- Job
- CCW
- Instructor
“Instructor Diaz was an extremely knowledgeable instructor who made learning interesting and fun, info was up to date and relevant, I would highly recommend this course to anyone looking to take courses for security or private investigation”
View Profile
Special Solutions
“Very satisfied with there professional expertise.”
View Profile
Scoutlogic Pre-Employment Background Screening
- Employers
- Questions
- Company
“I would highly recommend you work with them and make sure you ask all of your questions and really dig in with them for what your needs are- they are a valuable partner and don't treat you like just another numbered client!”
View Profile
Blue Star Security
- Officer
“Well l like it there it has the hot chocolate in the lobby they have all the cable channels the rooms are nice next door is a burger king and other stores near by the motel price is Good From Monday thru Thursday a bit more on Friday and Saturday”
The 24 agencies on this page are the private investigators listed for Northbrook, IL. 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: Northbrook, IL
21 of the 24 agencies on this page have a rating, from 3.8 to 5.0 across 466 reviews; 2 have 50 or more reviews and 16 are rated 4.5 or higher. 6 are open around the clock; 12 are open on Saturdays and 8 on Sundays. The services the agencies on this page list most often on their websites are surveillance (5), background investigations (3), child custody (2), corporate investigations (2) and criminal investigations (2). 10 show a license on their websites and 1 has a BBB rating of A or A+. Domain records put 19 websites of the agencies on this page at ten or more years old; the oldest dates from 1997. 6 offer urgent consultations; 5 offer a free initial consultation; 1 is family- or locally-owned and 1 lists coupons or special offers. We have a website on file for all 24 of the agencies on this page; 22 publish a contact page and 17 list a public email. 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.
Do investigators listed for Northbrook discuss a case free?
5 of the 24 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.
View Profile
U.S. Security and Protective Services
“Very professional place well structured i recommend them for their services!!!!”
View Profile
Citywide Security Group
“Because I work there”
View Profile
International Protective Services
View Profile
Myers Service
“I spoke to Nerdisa and she was knowledgeable and gracious in answering all of my questions and I had many.”
View Profile
Courthouse Courier
“Professionalism from start to finish, expedited services and would definitely recommend them to others, as well as using them again in the future.”
View Profile
Marshall Investigative Group
“From insurance fraud, to workers comp claims, Marshall Investigative Group goes the extra mile to find out critical information about a case.”
View Profile
Foresight Investigative Services
“I recently hired Foresight Investigative Services for a sensitive matter, and I couldn't be more impressed with their service.”
View Profile
Forest Security
- System
- DIY
- Technician
“The cellular coverage in my area changed a year after the alarm was installed FOREST came out immediately and replaced the radio communicator with a new one to account for the cellular service changes in my area which provided uninterrupted protectio...”
View Profile
Hogan Investigative Services
“The service was prompt, professional, and a reasonable price.”
View Profile
Chicago PI Services Group
“I might work with them one day!”
View Profile
H Brown Investigations
“Harry brown is the most effective investigator i have ever dealt with in all the years of my criminal law practice.”
View Profile
Culper
View Profile
Hibernian Strategic Solutions
“Our law firm has used Hibernian numerous times for service of process and investigative work.”
View Profile
Ginss
“Excellent service and communication.”
View Profile
Detective.com
View Profile
SCS & Associates
View Profile
Capital Security & Investigations
View Profile
Chicago Loss Prevention Group
Private Detective Services in Northbrook, IL Cost Estimates
Minimum cost
$300
Maximum cost
$9500
National Average
$1200
Avg Per Hour Rates
$125
$700
$2000
Fair price range is based on 404 cost profiles
Why these companies made our list
Is this page useful? Yes
No
Is there anything wrong with this page?
