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

Avatar for STANDGUARD SECURITY INC
STANDGUARD SECURITY INC
4.8(
75
)
Alarm or Security System - InstallAlarm or Security System - Install - For BusinessAlarm or Security System - Monitor+10 more

Serving Greenlawn, NY and surrounding areas

Approved

In business since 1982

Free estimates

Customers say: Super punctual

"We are very happy with our new alarm system and would definitely recommend Standguard Security Inc. to all our friends and family. They were a great team from start to finish, extremely professional and friendly. All of their work was cleanly done, the system was explained thoroughly and all of our questions were answered."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+4

Response time9 hrs
Response rate100%
Recommended by96%of homeowners
Avatar for ADT
ADT
4.5(
889
)
Fire - Protection and PreventionSurveillance Cameras - Install or RepairAlarm or Security System - Install+10 more

Serving Greenlawn, NY and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1874

Free estimates

Emergency services offered

"ADT has exceeded my expectations! The system is reliable, the app is easy to use, and the customer service team is always helpful. I appreciate the environmental monitoring features, which go beyond just security. Knowing my home is protected 24/7 is priceless. I highly recommend ADT to anyone looking for a trustworthy security provider."
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 EZ Switch
EZ Switch
4.6(
42
)
Surveillance Cameras - Install or RepairAlarm or Security System - InstallAlarm or Security System - Monitor+5 more

Serving Greenlawn, NY and surrounding areas

Approved

In business since 1996

Free estimates

Emergency services offered

"We hired EZ Switch to install exterior CCTV security cameras on a residential property. Alex was very helpful in selecting a product to suit our needs and demonstrated a good working knowledge of products available. The installation was completed as scheduled, with good communication keeping me advised of the status of special order products. The project was completed on time, with particular attention paid to every detail. The personnel were courteous, professional and Alex was very innovative in suggesting different methods to route the cables into the interior of the house. I am very pleased with the quality of the work performed by EZ Switch and would highly recommend them."
Bed-side light controller
Bed-side light controller
Bed-side light controller
Bed-side light controller
Main lobby camera

+24

Response time2 days
9 neighbors recently requested a quote
Recommended by96%of homeowners
Lovo Technology, LLC
5.0(
15
)
Alarm or Security System - InstallAlarm or Security System - Install - For BusinessAlarm or Security System - Monitor+4 more

Serving Greenlawn, NY and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's 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. We have consistently focused on the needs of our customers, providing personalized attention and a stress-free experience.

Recommended by66%of homeowners
Avatar for BuildingLI.com - BLI Facilities LLC
BuildingLI.com - BLI Facilities LLC
5.0(
32
)
Security Bars - Install or Repair - For Business

Serving Greenlawn, NY and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

BuildingLI.com specializes in commercial construction, site intel, site assessment, direct hands-on work, and coordinated subcontracted licensed MEP technical assistance to owners, property managers, and facility services companies. We specialize in occupied-space renovations in commercial, medical and mixed-use active environments.

before demo
kitchen demolition
demolition complete
kitchen tile job in progress
kitchen tile

+172

Response time7 hrs
Recommended by76%of homeowners
Concepts Automated
4.8(
6
)
Building Automation System - Install or Service - For BusinessSmart Home System - Install or Service

Serving Greenlawn, NY and surrounding areas

Approved

In business since 2016

Free estimates

Credit card accepted

Concepts Automated, a veteran owned business specializing in Residential and Commercial Audio/Video, Security Camera Systems, Automation Systems and Control, and Lighting Retrofits. Call us today and we look forward to your future business!

Response time7 hrs
Recommended by100%of homeowners
Avatar for Mr. Handyman of Huntington and Smithtown
Mr. Handyman of Huntington and Smithtown
4.6(
97
)
Security or Storm Shutters - InstallSecurity or Storm Shutters - Install - For Business

Serving Greenlawn, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Warranties offered

Small jobs welcome

"I highly recommend Greg very professional and experienced. Job was completed in a timely manner. Excellent job done ! Greg is on time and efficient, very professional and knowledgeable for all your home improvement needs. I highly recommend Greg."
Bath Wainscot
Before and After Photos
Before and After Photos
Before and After Photos
Fence and Gate Replacement

+130

Response time3 days
17 neighbors recently requested a quote
Recommended by67%of homeowners
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Showing 1-10 of 438

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