Keeping Chicago Safe

We Are Your Expert Source for New Alarm Systems in the Windy City

Alarm Detection Systems, Inc. has been family owned and operated in Aurora, Illinois for over 50 years. Therefore we have a rich history of protecting thousands of homes in Chicago and the burbs when it comes to essential security thousands of customers in Illinois turn to us.

We’ve got you covered with Home & Business Security everywhere in Chicago, be it Bridgeport, Downtown, Hyde Park, Old Town, or Wicker Park.

Limited Time Intrusion Takeover Offer

90 Days Free Security Monitoring on Takeovers

If you are a current alarm user in Chicago, ADS wants to earn your business! For a limited time, we are offering 90 Days Free Monitoring for all Security Takeovers.

This offer is available to both commercial and residential customers.


Offer is contingent upon subscriber signing a minimum three years Security System and Services Agreement and subscriber’s payment of activation fee. Alarm Detection Systems (ADS) may revoke or modify this offer at any time. Additional terms and conditions apply. See Security Systems and Service Agreement for details.

Unbeatable Customer Service 24 Hours a Day, Seven Days a Week.

At ADS, we specialize in alarm system reactivation and takeovers. We can reactivate your alarm system, monitor it 24 hours a day, provide maintenance throughout the life of your system, and even complete an alarm takeover from your previous provider. We’re so confident you’ll appreciate our services that we’re waiving the $75 activation fee for a limited time. 

Four Great Reasons to Choose Alarm Detection Systems. We:

  • Are a family-operated company that’s large enough to provide around-the-clock service, yet small enough to care about your individual needs
  • Are able to provide same- or next-day service with more than 100 certified technicians
  • Offer a Five Diamond Certified central monitoring system with continuous live support
  • Have been protecting local communities around Chicago for more than 50 years.

Home & Business Security
in Chicago

ADS professionals are ready to help you protect and secure your Chicago property with a complete security system. These are just a few of the threats a home or business security system can detect: 

  • Burglary
  • Fire
  • Intrusion
  • Carbon Monoxide
  • Flooding
  • Medical Emergencies
  • Unauthorized Access

“The installation techs went above and beyond what was required or expected. They spent a lot of time here and made sure I was 100% comfortable before leaving. Great job!”

Illinois Customer

“Technician was on time, professional and completed the service call quickly.”

Illinois Customer

“I would recommend ADS (Alarm Detection Systems, Aurora) for your companies alarm needs. They are prompt, informative, and friendly when they come to test the alarms. Paperwork from testing is received quickly.”

Illinois Customer 

“I have used ADS for over 6 years and had a service call. The technician, Israel, was one of the most thorough technicians I have ever had. Great company.”

Illinois Customer