Top-rated home security system pros.

Best home security system pros near Greenwich, CT

Enter your zip and get matched with up to 5 pros

Need a pro for your home security system service project in Greenwich, CT?

Select your specific project to find the pro for you.

TRUSTED BY GREENWICH, CT HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon44
    Verified home security system services reviews

Top-Rated Home security system pros in Greenwich - Updated Nov 2026

Avatar for Protect Your Home
Protect Your Home
2.6(
6
)
Alarm or Security System - InstallAlarm or Security System - Monitor

Serving Greenwich, CT and surrounding areas

Approved (Corporate)

In business since 1998

Free estimates

Credit card accepted

Protect Your Home is a leader in the home security industry, providing safety and peace of mind to more than 1.5 million families nationwide. Since we emerged in 1998, we've grown from a company of few to having over 2,000 high performance team members, three locations in Indianapolis, a sales center in Kentucky, and over 128 field branches across the country—and we're still growing. \n \nFor nearly 20 years, Protect Your Home has partnered with ADT®, the #1 name in home security. Today, with our national reach, we are one of ADT's biggest partners and the only partner to be designated as an Authorized Premier Provider. \n \nOur commitment to serving others combined with our projects, events, and culture contribute to the development of our team professionally, personally, and financially. \n \nIt's our mission. It's who we are. It's our legacy. \n

SA and Homeowner
Recommended by100%of homeowners
Avatar for Mario's Electrical Technologies LLC
Mario's Electrical Technologies LLC
5.0(
3
)
Smart Home System - Install or Service

Serving Greenwich, CT and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's custom needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job. \n

Panel Upgrade(400 Amp)
Panel Upgrade(400 Amp)
Panel Upgrade(400 Amp)
Panel Upgrade(400 Amp)
Panel Upgrade(400 Amp)

+3

50 neighbors recently requested a quote
Avatar for Security One
Security One
4.1(
456
)
Alarm or Security System - InstallAlarm or Security System - Install - For BusinessAlarm or Security System - Monitor+7 more

Serving Greenwich, CT and surrounding areas

In business since 2007

Credit card accepted

"It went great!  From Travis the sales person to Noah the installer I couldn't have asked for a more professional and through team to deliver my home security needs.  We just bought a new house in a neighborhood that's up and coming but there's still an element that we want to protect our home and valuable from.  Security One helped us find a system that we could monitor while we're away and that would make my girlfriend feel safe when I'm not a home.  We highly recommend them especially Travis and Noah.  Ask for them by name!
"
Pictures
Compare our Compact Door Sensors to our Competitors
Additional Photos
Additional Photos
Additional Photos

+16

Recommended by84%of homeowners
Avatar for 1st Security USA
1st Security USA
4.6(
362
)
Alarm or Security System - InstallAlarm or Security System - Install - For BusinessAlarm or Security System - Monitor+7 more

Serving Greenwich, CT and surrounding areas

In business since 2002

Free estimates

Emergency services offered

"Jeremy came out to my house to explain 1st Security's system (co-branded system with alarm.com), and gave me an amazingly good deal with the best pricing possible. The thing that amazed me was that 1st Security's pricing (both upfront equipment cost and the monthly monitoring charge, with full access to smart phone system) was LESS than the do-it-yourself options like FrontPoint. Yes--it was less than FrontPoint, even though 1st Security's pricing includes FULL installation by a professional (Larry, who was amazing--spent hours at my house making sure everything was right and teaching my husband and me how to use the system). Even more amazingly, 1st Security's monthly rate (again, less than FrontPoint) includes service, meaning that there is NO house-call charge, the way there was with my previous alarm company. If anything breaks, etc., they will come out and fix/replace it! Jeremy and Larry were both awesome--helpful, courteous, professional, prompt, etc. I highly HIGHLY recommend them and 1st Security. If you're thinking of going with a DIY alarm company to save money, don't bother--call 1st Security. They will also match other companies' prices!"
Recommended by94%of homeowners
...
Showing 1-10 of 117
Home Security Systems FAQs, answered by experts

It depends on your specific needs. A security system typically includes alarms, sensors for windows and doors , and 24/7 monitoring services, offering comprehensive protection with immediate response to potential threats. Cameras, on the other hand, primarily provide visual surveillance and evidence collection. A security system is preferable if your primary concern is deterring intruders and receiving real-time alerts. Cameras are ideal for monitoring and recording activities but might offer a different level of active protection. In many cases, a combination of both—a security system with integrated cameras—provides the most robust home security solution, offering prevention and documentation.

Yes, you can install a home security system in an old house. In fact, you can install a security system in any home. Some wiring may need to be added, but most home security systems do not require a lot of additional wiring. Wireless security systems can easily be installed with minimal additional wiring, if any at all. Most wireless security systems can be monitored and controlled from your smartphone, and the cameras and sensors operate on batteries.

Home automation systems offer a wide range of automation products and services. Some of the most popular options include:

  • Cameras: $35–$350

  • Door and window sensors: $20–$100

  • Doorbells: $100–$350

  • Locks: $150–$400

  • Garage door openers: $150–$500

  • Lighting: $20–$100

  • Speakers: $30–$300

  • Outlets and plugs: $20–$100

  • Thermostats: $150–$300

  • Smoke and carbon monoxide detectors: $50–$150

  • Smart home hubs: $200–$900

  • Blinds: $50–$75

  • Appliances: $50–$3,000

  • Vacuums: $200–$1,200

  • Lawn systems: $80–$300

  • Wi-Fi and Mesh systems: $200–$500

  • Water monitoring: $100–$1,000

Yes, these services often increase home value by preventing moisture-related issues and enhancing the usable space in basements or crawlspaces.

Each has its use, depending on the scenario. Security doors are primarily intended to keep people out of the home, while storm doors are used to protect the home from extreme weather. Both tend to be made from heavy-duty metal and may include glass panels to allow light to enter the home. Storm doors can feature mesh screens, just like screen doors, to allow for increased ventilation and to keep out pests. Security doors rarely, if ever, have mesh screens.

The Greenwich, CT homeowners’ guide to home security system services

From average costs to expert advice, get all the answers you need to get your job done.