HELP PROTECT YOUR HOME
ADT Home Security in Baltimore, MD
ADT is America’s most trusted* security company, tested and proven throughout our 150-year history Baltimore homeowners know we can help them protect what matters most.

Compare ADT security packages
Compare ADT security packages
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ADT+ Mobile App & Control
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Intrusion Detection
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Trusted Neighbor
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Front Door Video
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Perimeter Video
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Motion Detection
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Fire & Carbon Monoxide Detection
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Water & Temperature Detection
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Remote Access
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Alarm Cellular Backup
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30-day Event History
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Theft Protection Guarantee¹
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Money Back Guarantee¹
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24-Hour Battery Backup
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- 1 Requires ADT Complete pro monitoring plan and compatible devices. See here for terms.
- 2 Terms and conditions apply, see here for terms.
- 3 Applies after ADT has made attempts to resolve a system related issue. Requires purchase and continual monthly payment of both QSP and professional monitoring at time of activation to be eligible. See here for terms.
Convenience and protection in the palm of your hand
Convenience and protection in the palm of your hand
The ADT+ app lets you access your ADT system, Nest cams and Nest thermostats, all in one place.*
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Happy Customers in the Baltimore Area

Beverly
Ellicott City, MD
via ConsumerAffairs
Ellicott City, MD
via ConsumerAffairs
Feb. 28, 2017
"I have always trusted ADT to protect my home and family. They are conscientious and courteous. I have recommended them to my family, friends and neighbors.
They offer you the basic protection plan as well as the Medic-alert console. With this option they provide a feature in which they test your system monthly so that they could hear you in case of a medical emergency. I had to use them on one occasion in which they had to contact emergency services to get me an ambulance to get to the hospital. They literally saved my life."

Nicholas
Ellicott City, MD
via ConsumerAffairs
Ellicott City, MD
via ConsumerAffairs
June 25, 2017
"We had new windows installed, scheduled an appointment the next day to reinstall our sensors. ADT technician Matt **, the most courteous and knowledgeable technician I've ever met...
also reviewed and checked our entire system, ensuring that every facet of it operated correctly. When he finished, he thoroughly briefed us. If I ever need an ADT technician again, I want Matt **! Great ADT Service!"

William
Glen Burnie, MD
via ConsumerAffairs
Glen Burnie, MD
via ConsumerAffairs
Oct. 8, 2017
"I'm truly bless to have ADT for my service. ADT is there in need of time. They're with you twenty four Seven and three hundred and sixty-five days in a year.
ADT WILL KEEP YOU SMILING. I would tell everyone ADT GOT MY BACK."
ADT Baltimore Service Area
Our ADT Baltimore team offers professional home security installation and a variety of security and automation products and solutions.
Same-Day Installation
6-Month Money-Back Guarantee*
24/7 Live Phone Support
- ADT Security Services
- 9108 Guilford Rd Suite H
- Columbia, MD 21045
- United States
- (443) 863-7682
- Baltimore Office Hours
- M-F 8am - 4pm
- Sat/Sun Closed
- Questions? Call Us Today!
- M-F 7am - 9pm
- Saturday 8am - 6pm
- Sunday 9am - 6pm
- Catonsville
- Halethorpe
- Woodlawn
- Patapsco
- Lithicum Heights
- Brooklyn Park
- Dundalk
- Rosedale
- Edgemere
- Ferndale
- Essex
- Rossville
The ADT+ app gives you convenience and protection in the palm of your hand. You can access your ADT system, Nest cams and Nest thermostats, all in one place.*
More control, more choices, more peace. ADT has partnered with Google to give you more ways to help protected and stay connected to your home. Integrate Nest cams, Nest thermostats and Nest Hub for a more connected ADT system you can easily control, whether you’re at home or on the go.