We’re honored to have received the 2022 ADT Customer Satisfaction Award for the third year in a row. We take pride in every home we help to protect, and achieved this award based on our best-in-class customer service and commitment to the ADT brand. Thank you to all of our customers for helping us achieve this award!*

*Based on independent 2020-22 customer surveys. Customers are surveyed with one question following installation of an ADT-monitored security system

Customize Your Protection


Before it becomes part of your security system monitored by ADT, engineers test our products under some of the most difficult conditions to make sure they’ll perform in real-life scenarios when your health and safety may be at stake.

Plans & Packages

With ADT-monitored home security packages, you get more than just a smart security system. You get peace of mind from knowing there are more than 17,000 people across the United States helping to protect what you value most in your life.

Why Us

We want you to feel peace of mind, whether you’re at home or on the go. With so many parts of our lives changing there are also threats to our security that are changing. HM Security is adding even more ways to help you and your loved ones stay protected.

Professional Installation

Our highly trained and skilled technicians are ready to protect your home or business.
Call at 800-377-4082.

to get your free quote.

How to Get Started


Give us a call

Call us at 800-377-4082 to get a free quote.


Customize your system

In the call we will customize a system to fit your needs.


Schedule your installation

Pick a time that works for you. HM Security will send a professional technician to get your system installed.

About Us

HM Security Inc. is an ADT Authorized Dealer (LIC 8066019) that covers the [Los Angeles County] area and has been in business for over 10 years. We are located at: 11455 Paramount Blvd Suite H, Downey, CA 90241. Our phone number is: (800) 377-4082. We take pride in delivering world-class customer service and providing our clients with the perfect security system to match their needs.

What Our Customers Say

Highly recommend! Installed cameras and security system for our business with very personalized, seamless service at a great price.
– Dan Fournier
I am so happy I called HM Security for my ADT alarm system. I wanted to get an alarm system to save on my homeowners insurance. I called Rey the owner at 11am and by 5pm i was already installed with my new alarm system and explaining to my husband and I how to use it. I will definitely recommend HM Security to my friends, cowokers and family for any of their security needs.
– Mie Nocon
We had Bay Alarm in our facility we made some changes to our building and called for new service the price was much higher than we expected. We decided to look for another company. I called HM Security and Rey was so helpful and he came out the same day with his tech. He send me the quote for ADT and it was amazing. We are grateful and thankfull for the amazing work and support and dedication that he has given to us. If anyone is looking for a great company and services please contact Rey.

– Erika Sanchez