Higher Customer Satisfaction with HM Security

Peace of mind starts with feeling secure. We're dedicated to helping protect Southern California communities with top-rated security systems and award-winning customer service.

We’re honored to have received the ADT Dealer Customer Satisfaction Award three years in a row.  

Thanks to our customers who trust us every day!

New Customer Deals

Customize Your Protection


Before it becomes part of your security system monitored by ADT, engineers test devices 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.

ADT systems work when there is no Wi-Fi or power, with cellular back-up  built in.

When it comes to smart, we offer new and intelligent Google Nest products.

See Equipment

Plans & Packages

With ADT-monitored 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.

Choose a plan for your:

Why Us

We want you to feel peace of mind, whether you’re at home, at your business  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 help protect your home or business.

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

We will customize a system to fit your needs and budget.


Schedule your installation

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

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
Burbank, CA
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
Sun Valley, CA
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
Long Beach, CA