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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 ADT
ADT
4.5(
889
)
Surveillance Cameras - Install or RepairAlarm or Security System - InstallAlarm or Security System - Repair+5 more

Serving Greenwich, CT and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1874

Free estimates

Emergency services offered

"I used to work in the security industry. Once I got married and had kids I definitely wanted a home security system. Bought ADT about a month ago and it’s worked out excellent. No glitches or issues and everyone was awesome in the buying and activation process."
Home Security Essentials
Smart Home Security
Cameras
Our Team
Home Security Essentials

+35

36 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Wa/ve Sound and Security, LLC
Wa/ve Sound and Security, LLC
4.6(
61
)
Surveillance Cameras - Install or RepairSurveillance Cameras - Install or Repair - For BusinessAlarm or Security System - Install

Serving Greenwich, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2007

Free estimates

Emergency services offered

"Wes did an outstanding job for us!! We installed a security system and upgraded our home audio system. First he did an evaluation of our needs and made recommendations to help us accomplish our goals. He was very knowledgeable and provided excellent advice including upgrading our wifi system so that the final installations would perform as intended. His pricing was fair, he always responded promptly and scheduled and completed the work on the dates he promised. I would highly recommend Wa/ve Sound & Security!"
speaker mounted on the wall and camera in corner
surveillance camera
Surveillance  Camera on Wall
surveillance camera mounter between ceiling joists
Under eve camera

+10

Response time2 days
18 neighbors recently requested a quote
Recommended by85%of homeowners
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

46 neighbors recently requested a quote
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

"Great company to deal with. Totally customer focused. My wife was not comfortable with me installing our security system myself, so internet based alarm companies were a no go. I contacted our existing company, Vector, Vivant, ADT & 1st Security. I met with all of the reps. Jeremy from 1st Security came to our home right away to conduct a detailed security assessment. He listened to our needs and our concerns with our existing landline based security system (through Vector), and he designed an effective yet practical and affordable set up for our home. Their prices cannot be beat- trust me I did my homework. Larry came to install the new security system and he was also great to deal with. Knowledgeable and patient- he took his time to explain how the system worked and gave us his cell # in case we had any issues. Kudos to 1st Security USA! Great folks doing business the way it should be done- honest and professional. I will be spreading the word"
Recommended by94%of homeowners
Avatar for Protect Your Home
Protect Your Home
3.3(
325
)
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 1998

Credit card accepted

"They gave us the best rate and the setup was great for ADT system. The installer did have to tell us about other options that would cost more money but he did not pressure us when we declined. We had door, window and motion detectors included. They gave us a week to practice on the new system, but we could call if we were ready to go live sooner which we did. Set up was quick, easy and uneventful. Very nice installer, Phillip Brown. The cost was quoted at a low price, but the bill came from ADT and was much higher. We were told the contract to ADT did not catch up and we will be getting the lower price with a reimbursement for the excess of the first bill. We did the $99 install and are getting a $100 gift card back. 3 year contract is a little annoying but we plan to stay here for a long time."
Protect Your Home Vehicle
Recommended by63%of homeowners
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Home Security Systems FAQs, answered by experts

You'll likely need more than great home staging to sell your home. Now is a great time to get to work on the curb appeal of your home . Hire local exterior painters and landscapers to coat the exterior of your home and bring it new life with some sprucing up.

Ultimately, the decision should align with your objectives. For general home security, visible cameras at entry points and high-traffic areas are recommended to deter intruders. In areas where privacy is a concern, use hidden cameras sparingly and within legal limits.

You should always install cameras at exterior doors and windows. Other areas where you should place cameras are your front and back yards, the garage and driveway, common living areas, hallways and staircases, and the basement. Remember, you can start with a small Wi-Fi security camera system and always add more cameras if needed.

While security hubs can streamline the management of security cameras, the placement of cameras itself is often determined by factors like your property layout, security objectives, and areas of concern.

Yes, keyless locks can deter burglars, mostly because they boost security and offer advanced features. Most models allow for unique codes or temporary access, making it harder for intruders to break in. Many of these smart locks even alert you if someone tries to tamper with them. However, you need to remember that while they provide an added layer of protection, no lock is completely foolproof. Pairing these locks with good security habits—like proper lighting and surveillance cameras—creates a strong defense to help stop intruders in their tracks.

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.