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Home Security

Made Simple.

Get 140+ years of experience

with smart home security

systems monitored by ADT.

50% Off*

ADT Outdoor Cameras.
Use promo code: OUTSIDE50

Courtesy of Mountainside Security

with video lite monitoring

Get a FREE Quote

Fill out the form below and Mountainside Security will contact you about special offers.


About Us

Mountainside Security is a family owned and operated security alarm dealer based out of Phoenix, Arizona.  Partnered with SafeStreets USA, ADT's #1 Authorized Provider, we offer the highest quality of Home Security Systems, Cameras, Sensors and Home Automation systems on the market.  Our mission is to help the community protect what matters most with security alarm systems customized to fit your family's needs and to provide transparent, honest and World class customer service from start to finish.  

Alarm Systems Customized

For Your Home

Every home security package is designed to fit your specific needs at affordable pricing to fit your budget. Whether you want just the basics or the smart home security system of your dreams, our team can help you customize the alarm system that fits your home. Don't forget to mention offer code "outside50" to receive 50% off* an ADT Outdoor Camera.

Home Automation

Arm, disarm or check your home automation system status from virtually anywhere. Connect and control your security, lighting, locks, thermostats, cameras and more remotely with the highly intelligent ADT mobile app.

Security Cameras

From indoor and outdoor security cameras to video doorbell cameras, you can sleep easy knowing that your home is secure. Give us a call and we'll be happy to discuss our variety of HD security cameras and packages.

Help Protect What Matters Most

Watch how an ADT Monitored Smart Home Security system can transform the way you live and help you protect the ones that matter most.

Easy as 1, 2, 3...

Step 1

Get A Quote

Step 2

Get Installed

Our highly trained, certified technicians stay at the forefront of security technology to ensure your system works right.

Step 3

Download the App

Gain the freedom to control your home from virtually anywhere using our intelligent, convenient ADT mobile app.