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Top-Rated Alarm or security system installers in Brentwood - Updated Nov 2026

Avatar for SafeStreets - ADT Authorized Provider
SafeStreets - ADT Authorized Provider
4.8(
320
)
Alarm or Security System - Install

Serving Brentwood, CA and surrounding areas

Approved (Corporate)

In business since 2010

Free estimates

Emergency services offered

"It was nice to felt heard and understood when we contacted Alarm Protect Group. Our prior experiences with other security companies was horrible. You could either never get ahold of someone or they offered overly expensive options. Received a security system that was in our budget and wish we could have found Alarm Protect Group sooner."
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+1

4 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for ADT
ADT
4.5(
891
)
Alarm or Security System - Install

Serving Brentwood, CA and surrounding areas

Approved (Corporate)

In business since 1874

Free estimates

Emergency services offered

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. \n \nWe 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. \n \nAll 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.

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+44

Recommended by88%of homeowners
Avatar for SafeTight Security LLC
SafeTight Security LLC
5.0(
1
)
Alarm or Security System - Install

Serving Brentwood, CA and surrounding areas

Approved

In business since 2021

Free estimates

Warranties offered

SAFETIGHT SECURITY LLC 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.

SafeTight Security
Services We Offer
SafeTight Security
Services We Offer
SafeTight Security

+23

Response time2 days
Recommended by100%of homeowners
Avatar for Protect Your Home
Protect Your Home
2.6(
6
)
Alarm or Security System - Install

Serving Brentwood, CA 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 Security One
Security One
4.1(
456
)
Alarm or Security System - Install

Serving Brentwood, CA and surrounding areas

In business since 2007

Credit card accepted

".After our home was broken into in January 2014, I was motivated to install a security system. I asked my family about the services they use, and several people warned me about the small print in most contracts, and how tough it is to get out of contracts. Angie's List was running a special with Security One/Safe Home Security systems; they are highly rated, so I bought the special. I am very pleased with the level of customer service: they responded quickly via email or phone to all of my questions. Their technician guided me on the doors & windows to select for motion sensors. I am able to track disarming of the security pad by user via email, which means an email pops up whenever my kids come home/disarm the system. I am also able to track arming/disarming via their mobile app, or use the mobile app to arm/disarm the house. The monthly payment plan is affordable & there are no contract surprises/changes written in. They also guide me on things I would have forgotten, like registering my alarm system with the local police. I appreciate their guidance and service.
"
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+16

Recommended by84%of homeowners
Premier Security Solution
4.4(
81
)
Alarm or Security System - Install

Serving Brentwood, CA and surrounding areas

In business since 2007

Free estimates

Emergency services offered

"We contacted this company because our burglar alarm wasn't working. Deanna, who works in the office, helped us troubleshoot the problem over the phone and she quickly resolved the issues. The burglar alarm works fine now thanks to Deanna, who was so professional and patient with us and went out of her way to help resolve the problem. I will definitely use them again if I have problems and would highly recommend them."
Recommended by100%of homeowners
Avatar for Frontpoint
Frontpoint
4.7(
8,819
)
Alarm or Security System - Install

Serving Brentwood, CA and surrounding areas

In business since 2007

Free estimates

Emergency services offered

"Frontpoint is very easy to use... it's one of the only DIY services out there. You can install all the sensors yourself (they are all wireless). You stick them where they need to go with very clear instructions, and if you do need help Frontpoint support is excellent. You always get someone on the phone, and they are always happy to walk you through any issues you're having. I've had issues a few different times with dead batteries in a sensor, or misplacement of a sensor causing issues, and in all cases they've resolved the issues quickly over the phone. Because of this, I can manage the system myself (and that's pretty much installation upfront, updating equipment every few years/as needed, and support very rarely). We've yet to have a breakin or anything like that, but we've had several false alarms where my wife accidentally set the alarm off... and in those cases, Frontpoint calls you immediately, asks you for a password, and then asks if you need assistance. Of course we don't, but if they can't reach you... which has also happened... they call the next person on the list (my wife). If they can't reach that person, the cops are already on their way while Frontpoint works down the list of family members, neighbors, etc. to let them know there is an incident at the house and the cops are on their way. This has happened a couple times (due to user error). But it's good to know they have our backs if there is ever a real issue. A+ for Frontpoint."
Recommended by93%of homeowners
Avatar for SafeStreets, USA
SafeStreets, USA
4.4(
160
)
Alarm or Security System - Install

Serving Brentwood, CA and surrounding areas

In business since 2014

Free estimates

Emergency services offered

"Jason answered all our questions and helped evaluate what equipment would meet our needs. The installer Scott spent the entire day installing the alarm system and cameras (on a cold and rainy/snowy day). He took the time to ask us where we wanted the alarms installed, and explained how everything worked. Very impressed by the quality of work and customer service. I would recommend this company highly."
WIRELESS FLOOD SENSOR
WIRELESS CARBON MONOXIDE DETECTOR
WIRELESS SMOKE & HEAT DETECTOR
WIRELESS GLASS BREAK DETECTOR
WIRELESS DOOR & WINDOW SENSORS

+8

Response time6 days
Recommended by98%of homeowners
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FAQs for alarm or security system installation projects in Brentwood, CA

If you terminate your security system before your contract ends, you’ll likely have to pay a cancellation fee—often a percentage of the remaining contract balance. To avoid these fees, consider choosing a brand that offers contract-free plans, like SimpliSafe or Vivint. You can also negotiate with your provider to see if they provide pro-rated cancellation fees or special exceptions.

Paying for a security system is a valuable investment because it enhances your home’s safety and deters criminal activity. With millions of property crimes each year, having robust security measures helps protect your property and might even lower your insurance premiums. It's a worthwhile investment for lasting peace of mind.

The average cost to install security cameras ranges from $125 to $3,500, depending on the amount, type, and placement. To install a complete setup of four cameras, homeowners can expect to invest an average of $1,300 for labor and equipment. Installing multiple cameras gives you comprehensive coverage of vulnerable entry points and enhances overall property security.

The Brentwood, CA homeowners’ guide to alarm or security system installations

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

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