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ADT, your trusted Home Security Provider in Long Island City, NY
(800) 489-9070ADT provides professional security installation and 24/7 monitoring to homeowners and small businesses across Long Island City, New York, and the surrounding boroughs. The ADT Long Island City team serves homes and local businesses throughout Queens, Brooklyn, and Manhattan, including Astoria, Sunnyside, Woodside, Jackson Heights, Greenpoint, Williamsburg, Midtown, and the waterfront developments along the East River.
ADT has six company-operated 24/7 monitoring centers, the largest presence in the industry. All of our monitoring centers are based in the U.S. and are not outsourced.
47-40 21st St
Long Island City NY 11101
United States
(718) 395-2048
Nearby Cities
Mon-Fri: 8AM - 4PM
Sat-Sun: Closed
Mon-Fri 7AM to 9PM
Saturday 8AM to 6PM
Sunday 9AM to 6PM
Happy Customers in the Long Island City Area
Tyson
Brooklyn, NY
“Greeting, I appreciate your service. Customer service is wonderful. Technician that was sent to my home was great. A true professional. This is why you are one of the best alarm company is the nation. I will look forward to future system and software upgrade.”
Judy
Brooklyn, NY
“ADT responded to the alarm very quickly and the operator was very professional but friendly. Asked all the right questions and wanted to know if she could be of any more assistance. I would definitely recommend ADT to a friend or family member.”
Yolanda
Bronx, NY
“Your system is very dependable, reliable, secure and a real peace of mind. I would recommend it to all my family and friends. I'll get it anywhere I move, if it's available, of course. Thank you, thank you, thank you for your service! I appreciate it.”

Already know what you want? Sit back and relax while ADT pros get it done right.

Need help deciding? ADT Solutions Advisors can come to your home and help create a system recommendation.

Looking for quick and easy install? Do it yourself with no heavy-duty tools needed.
Long Island City, NY Service Area & Local Process
The ADT Long Island City branch provides professional installation of the ADT Smart Home System for residences, along with tailored small business security solutions—including video surveillance, access control, and intrusion detection—throughout Queens, Brooklyn, and Manhattan.
New York City experiences nor’easters, heavy snow, and coastal flooding in fall and winter, along with severe thunderstorms and heat waves in summer. The ADT Smart Home System includes backup battery power to help keep the system powered during a power outage. If internet service is disrupted, cellular backup may help keep the system connected to ADT monitoring, as long as you have an active ADT monitoring plan and cellular service is available. Water and temperature sensors are a practical addition for Long Island City homes, condos, and storefronts, where urban flooding, aging building infrastructure, and basement water intrusion are persistent concerns.
Long Island City, NY Local Regulations & Requirements
Contact the NYPD or your local precinct to verify current alarm permit and registration requirements for residential security systems in New York City. Your ADT professional installation technician can provide guidance during your consultation.
Homeowners and renters in Long Island City apartments, condominiums, and co-ops should verify installation permissions with their property management or building board before scheduling professional installation.
Award-winning protection trusted by nearly 15M+ ADT customers.
WHY ADTExplore security solutions designed to help protect your small business, property and people. See how ADT can help you find the right security system for your business.


If you’ve moved into a home with an ADT smart home security system that’s still working, we can reactivate it for you—just give us a call.
You have questions, we've got you covered
Do I need an alarm permit in Long Island City, New York?
Contact the NYPD or your local precinct to verify current alarm permit requirements for residential security systems in New York City. Your ADT professional installation technician can provide guidance during your consultation.
Does ADT install in Long Island City apartments and condos?
ADT offers professional installation for apartments, condos, and co-ops in Long Island City and throughout Queens, including waterfront high-rises, brownstones, and multi-family buildings. Before scheduling, verify with your building management or co-op board that security system installation is permitted.
Does ADT provide security for small businesses in Long Island City?
Yes. ADT offers professional security solutions for small businesses across Long Island City, Queens, Brooklyn, and Manhattan, including video surveillance, access control, intrusion detection, and 24/7 monitoring backed by six U.S.-based monitoring centers.
What areas near Long Island City does ADT serve?
The ADT Long Island City branch serves homeowners and businesses throughout Queens, Brooklyn, and Manhattan, including Astoria, Sunnyside, Woodside, Jackson Heights, Flushing, Greenpoint, Williamsburg, and Midtown.
How long does ADT installation take in Long Island City?
Installation times depend on the home, system configuration, equipment selected, and installation conditions.
Can I add cameras or smart home devices after installation?
ADT customers in Long Island City can add cameras, smart locks, smart lighting, and additional sensors to their ADT Smart Home System at any time.