Top-rated home security system pros.

Get matched with top home security system pros in Diamond Bar, CA

There are 4 highly-rated local home security system pros.

Need a pro for your home security system service project in Diamond Bar, CA?

Select your specific project to find the pro for you.

TRUSTED BY DIAMOND BAR, CA HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon30
    Verified home security system services reviews

Find Home security system pros in Diamond Bar

Avatar for ADT

ADT

4.53(
736
)
Approved Pro

ADT

4.53(
736
)
Approved Pro
Customers say: Terrific value
4014 local quotes requested
151 years of experience

ADT home security systems are backed by more than 145 years of experience. As the leader in home security, ADT can help you customize a home security system with easy-to-use equipment and special security features to meet your safety needs. We have service centers nationwide that can install an ADT home security system within 24 hours in most areas. Once your home is equipped with our top-of-the-line system, it is connected to a network of ADT Monitoring Centers nationwide which deliver non-stop security monitoring 365 days a year. All of our installation technicians are internal employees, and not third-party contractors. You can count on your Security Advisor to take the time to set up your system properly, help you understand how the system works, and help make sure your home and family are thoroughly protected.

"Went well. Will know more later"

Pre P on November 2025

ADT home security systems are backed by more than 145 years of experience. As the leader in home security, ADT can help you customize a home security system with easy-to-use equipment and special security features to meet your safety needs. We have service centers nationwide that can install an ADT home security system within 24 hours in most areas. Once your home is equipped with our top-of-the-line system, it is connected to a network of ADT Monitoring Centers nationwide which deliver non-stop security monitoring 365 days a year. All of our installation technicians are internal employees, and not third-party contractors. You can count on your Security Advisor to take the time to set up your system properly, help you understand how the system works, and help make sure your home and family are thoroughly protected.

"Went well. Will know more later"

Pre P on November 2025


Avatar for SafeStreets - ADT Authorized Provider

SafeStreets - ADT Authorized Provider

4.85(
296
)
Approved Pro

SafeStreets - ADT Authorized Provider

4.85(
296
)
Approved Pro
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
105 local quotes requested

For 140 years, ADT has been the leading home security provider in the country. SafeStreets, ADT's Authorized Provider, sells and installs ADT-monitored home security systems. Our team consists of 300+ trained consultants, covering more than 90% of the United States across 44 states. We are experts on the latest smart-home technology, and highly focused on giving all customers a 5-Star Experience™. SafeStreets is committed to bringing high-tech security equipment, backed by 24/7 professional monitoring, to the place that matters most - your home. We have same day and next day appointments available, all scheduled within a one hour window. Call us anytime for a custom home security assessment and free quote! Comprehensive Security System ADT 24/7 Monitoring Touch Screen Control Panel Motion Detectors, Glass Break Sensors, & Point-of-Entry Sensors Indoor, Outdoor, & Doorbell Cameras Smart Home Automation Smoke, Carbon Monoxide, & Flood Sensors Mobile App Control Cellular Connection Back-up Battery Supply Maintenance/Extended Warranty Homeowners Insurance Certificate Theft Protection Guarantee

"In the past we’ve avoided getting into agreements or contracts with our home security providers but felt comfortable and confident doing so with Safe Streets. Their monitoring and surveillance centers are nationwide and open 24 hours. They made the process really easy and informed us of all the benefits by being under monitoring agreement. Told both of our neighbors about our experience and they plan to sign up too."

Jacob F on November 2025

For 140 years, ADT has been the leading home security provider in the country. SafeStreets, ADT's Authorized Provider, sells and installs ADT-monitored home security systems. Our team consists of 300+ trained consultants, covering more than 90% of the United States across 44 states. We are experts on the latest smart-home technology, and highly focused on giving all customers a 5-Star Experience™. SafeStreets is committed to bringing high-tech security equipment, backed by 24/7 professional monitoring, to the place that matters most - your home. We have same day and next day appointments available, all scheduled within a one hour window. Call us anytime for a custom home security assessment and free quote! Comprehensive Security System ADT 24/7 Monitoring Touch Screen Control Panel Motion Detectors, Glass Break Sensors, & Point-of-Entry Sensors Indoor, Outdoor, & Doorbell Cameras Smart Home Automation Smoke, Carbon Monoxide, & Flood Sensors Mobile App Control Cellular Connection Back-up Battery Supply Maintenance/Extended Warranty Homeowners Insurance Certificate Theft Protection Guarantee

"In the past we’ve avoided getting into agreements or contracts with our home security providers but felt comfortable and confident doing so with Safe Streets. Their monitoring and surveillance centers are nationwide and open 24 hours. They made the process really easy and informed us of all the benefits by being under monitoring agreement. Told both of our neighbors about our experience and they plan to sign up too."

Jacob F on November 2025


Avatar for Its Showtime Inc

Its Showtime Inc

5.00(
15
)
Approved Pro

Its Showtime Inc

5.00(
15
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
107 local quotes requested

Its Showtime Inc has been in business since 1999 and specializes in making complex audio and video system easy to use. From the simplist living room system to the most complex bar or restaurant system we can make the system not only look clean but give you the ability to work it with ease.

"Amazing. These guys are the best. I have used them several times and I refer them often"

Landon P on October 2024

Its Showtime Inc has been in business since 1999 and specializes in making complex audio and video system easy to use. From the simplist living room system to the most complex bar or restaurant system we can make the system not only look clean but give you the ability to work it with ease.

"Amazing. These guys are the best. I have used them several times and I refer them often"

Landon P on October 2024


Avatar for BORIS BETOEI FIRE PROTECTION

BORIS BETOEI FIRE PROTECTION

5.00(
5
)
Approved Pro

BORIS BETOEI FIRE PROTECTION

5.00(
5
)
Approved Pro
Customers say: Quick response
20 local quotes requested
15 years of experience

Boris Betoei Fire Protection is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you!

"Work done quickly and at reasonable price."

Ryna A on July 2025

Boris Betoei Fire Protection is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you!

"Work done quickly and at reasonable price."

Ryna A on July 2025


Avatar for Dru.id Security, LLC

Dru.id Security, LLC

5.00(
4
)
Approved Pro

Dru.id Security, LLC

5.00(
4
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
6 years of experience

With years of experience in the security industry, we are the experts you need to take care of your business. We handle all of your surveillance and security needs with great care. We will treat your business as we would treat our own. Give Dru.id Security a call today, we look forward to working with you!

"Andrew and his team worked very efficiently and cleaned up their mess as if they were never here. They arrived on time to each meeting and was willing to work with my company in finding a system that met our budget. Would definitely recommend them to anyone looking for a good security system! They do it all, the research finding the right system to meet your budget, taking down old systems, installing and tech support! Simply amazing!"

Amy X on February 2023

With years of experience in the security industry, we are the experts you need to take care of your business. We handle all of your surveillance and security needs with great care. We will treat your business as we would treat our own. Give Dru.id Security a call today, we look forward to working with you!

"Andrew and his team worked very efficiently and cleaned up their mess as if they were never here. They arrived on time to each meeting and was willing to work with my company in finding a system that met our budget. Would definitely recommend them to anyone looking for a good security system! They do it all, the research finding the right system to meet your budget, taking down old systems, installing and tech support! Simply amazing!"

Amy X on February 2023


A.H.S. Protection

5.00(
1
)
Approved Pro

A.H.S. Protection

5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
10 years of experience

We are a locally owned and operated company. We value honesty and integrity in all aspects of our business. We offer a variety of home improvement services that are customized to each individual project. We pride ourselves on the quality of our work, as well as our commitment to outstanding results. We look forward to building lasting relationships with our clients and guarantee your satisfaction!

"Really fast response, always in touch by email or phone, really flexible on time and dates, highly recommended."

Madi on October 2021

We are a locally owned and operated company. We value honesty and integrity in all aspects of our business. We offer a variety of home improvement services that are customized to each individual project. We pride ourselves on the quality of our work, as well as our commitment to outstanding results. We look forward to building lasting relationships with our clients and guarantee your satisfaction!

"Really fast response, always in touch by email or phone, really flexible on time and dates, highly recommended."

Madi on October 2021


Avatar for Legion Fire Protection

Legion Fire Protection

5.00(
2
)
Approved Pro

Legion Fire Protection

5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
7 years of experience

Legion Fire Protection is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

"Great customer service, works really fast."

Michale M on December 2021

Legion Fire Protection is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

"Great customer service, works really fast."

Michale M on December 2021


Avatar for Resource One Low Voltage Security, Inc.

Resource One Low Voltage Security, Inc.

4.95(
21
)
Approved Pro

Resource One Low Voltage Security, Inc.

4.95(
21
)
Approved Pro
Customers say: Quick response
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
9 years of experience

We specialize in Low Voltage Surveillance Security Cameras. We are committed to the highest quality work, and promise expert professionalism, and respect. We have over 17 years of industry experience can do just about anything to do with Low Voltage work. We pride ourselves in promptness, and efficiency. Call now to book an appointment with one of our well trained installers today! Satisfaction Guaranteed!

"On time service. Delivered what he promised and went out his way to keep me happy. He is the best and I highly recommend him to anyone."

Harry K on September 2020

We specialize in Low Voltage Surveillance Security Cameras. We are committed to the highest quality work, and promise expert professionalism, and respect. We have over 17 years of industry experience can do just about anything to do with Low Voltage work. We pride ourselves in promptness, and efficiency. Call now to book an appointment with one of our well trained installers today! Satisfaction Guaranteed!

"On time service. Delivered what he promised and went out his way to keep me happy. He is the best and I highly recommend him to anyone."

Harry K on September 2020


Alternative Fire Protection Services

5.00(
2
)
Approved Pro

Alternative Fire Protection Services

5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
29 years of experience

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.

"They sent 2 guys who treated me as a customer. How novel."

Jac C on June 2023

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.

"They sent 2 guys who treated me as a customer. How novel."

Jac C on June 2023


Avatar for CSI Security

CSI Security

4.63(
8
)
Approved Pro

CSI Security

4.63(
8
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
13 years of experience

CSI Security is an independent local security, fire, camera, and card access system firm in West Los Angeles. We are dedicated to delivering exceptional results to our clients. With over 40 years of industry experience and 10,000 system installs, we have developed keen knowledge of installing trouble-free systems.

"My security system was not working properly. They where here on time the repair person Amir was knowledgeable and replaced my transformer and backup battery in less than a hour. Now it works great. I would recommend to anyone who wants or has security system.. Review by jim G. Malibu,CA"

Jim G on October 2020

CSI Security is an independent local security, fire, camera, and card access system firm in West Los Angeles. We are dedicated to delivering exceptional results to our clients. With over 40 years of industry experience and 10,000 system installs, we have developed keen knowledge of installing trouble-free systems.

"My security system was not working properly. They where here on time the repair person Amir was knowledgeable and replaced my transformer and backup battery in less than a hour. Now it works great. I would recommend to anyone who wants or has security system.. Review by jim G. Malibu,CA"

Jim G on October 2020

...
Showing 1-10 of 225
Home Security Systems questions, answered by experts

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.

Various types of deadbolts are available, from the classic single-cylinder lock to a double-cylinder, rim deadbolt, smart deadbolt, and electronic deadbolt lock. Most homes in the U.S. use a single-cylinder deadbolt lock, which requires a key on the exterior and only a thumb turn on the interior to open or close the lock. 

You don’t need to completely revamp your security system constantly, but it’s a great idea to give it a once-over every year. Look for potential upgrades or new features—like smart home tech or replacing outdated equipment—that could boost your safety. If you make any significant changes, let your insurer know as they may adjust your discounts to reflect your improved security. Staying on top of your security not only keeps your home safe but ensures you’re getting the best possible rate on your insurance.

Home security cameras typically do not record continuously 24/7. Most options use motion detection technology to trigger recording when they sense movement or a significant change in their field of view. This approach conserves storage space and reduces the need for constant monitoring. When motion is detected, the camera starts recording and may send alerts to the homeowner. However some cameras offer the option for continuous recording, but this requires substantial storage capacity and may overwrite older footage when space runs out.

Some but not all security cameras have monthly fees, depending on the specific camera system and the services offered with it, especially monitored vs. unmonitored security systems. Home security companies that offer monitoring services along with cameras will charge a monthly fee for monitoring and possibly for using the security cameras. Cameras that you monitor yourself as part of your own security system will not have monthly fees charged.

The Diamond Bar, CA homeowners’ guide to home security system services

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