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    Verified home security system services reviews

Find Home security system pros in Greenbrae

Avatar for ADT

ADT

3750 Priority Way South Dr
4.53(
734
)
Approved Pro

ADT

3750 Priority Way South Dr
4.53(
734
)
Approved Pro
Customers say: Terrific value
3699 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.

"Bought security through ADT mainly for the automation options that come with the system. My spouse loves being able to turn on and off our lights in different areas of the house while we are gone. We travel often, so giving the illusion that we are home is a good deterrent."

Luke W on October 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.

"Bought security through ADT mainly for the automation options that come with the system. My spouse loves being able to turn on and off our lights in different areas of the house while we are gone. We travel often, so giving the illusion that we are home is a good deterrent."

Luke W on October 2025


Avatar for Service Champions Heating & Air Conditioning

Service Champions Heating & Air Conditioning

4430 Yankee Hill Rd
4.64(
655
)
Approved Pro

Service Champions Heating & Air Conditioning

4430 Yankee Hill Rd
4.64(
655
)
Approved Pro
Customers say: Super punctual
457 local quotes requested
22 years of experience

Service Champions is the leading heating and air conditioning contractor in Northern California servicing homeowners in East Bay, South Bay and Sacramento areas. We can make your home more comfortable and improve the quality of air you and your family breathe. We specialize in maintenance, repair and sales of all brands of air conditioners and heaters, and are experts in indoor air quality improvement through filtration, duct replacement, insulation and hospital grade UV lights. All the air conditioners we install have the new environmentally friendly refrigerant that does not damage the ozone. We also are huge proponents of super high efficient equipment, such as 95% efficient furnaces. This equipment saves homeowners a tremendous amount of money on their utility bills.

"Our Service Tech, Alex Peck, arrived on time to perform the annual check up & tune-up of our HVAC System. He was very professional and following the Tune-Up asked if there was any other items that needed done or looked into that he could take care of. His services were very much appreciated and very professional. Lee"

Lain L on September 2025

Service Champions is the leading heating and air conditioning contractor in Northern California servicing homeowners in East Bay, South Bay and Sacramento areas. We can make your home more comfortable and improve the quality of air you and your family breathe. We specialize in maintenance, repair and sales of all brands of air conditioners and heaters, and are experts in indoor air quality improvement through filtration, duct replacement, insulation and hospital grade UV lights. All the air conditioners we install have the new environmentally friendly refrigerant that does not damage the ozone. We also are huge proponents of super high efficient equipment, such as 95% efficient furnaces. This equipment saves homeowners a tremendous amount of money on their utility bills.

"Our Service Tech, Alex Peck, arrived on time to perform the annual check up & tune-up of our HVAC System. He was very professional and following the Tune-Up asked if there was any other items that needed done or looked into that he could take care of. His services were very much appreciated and very professional. Lee"

Lain L on September 2025


Avatar for SafeStreets - ADT Authorized Provider

SafeStreets - ADT Authorized Provider

615 N 150 E
4.85(
292
)
Approved Pro

SafeStreets - ADT Authorized Provider

615 N 150 E
4.85(
292
)
Approved Pro
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
60 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

"connected with safestreets to get home security setup. it’s been fine. have used many other services before but this one seems like it will fit our needs best."

Cheri O on October 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

"connected with safestreets to get home security setup. it’s been fine. have used many other services before but this one seems like it will fit our needs best."

Cheri O on October 2025


Avatar for Digital Living

Digital Living

19201 Sonoma Highway
4.82(
266
)
Approved Pro

Digital Living

19201 Sonoma Highway
4.82(
266
)
Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
31 years of experience

****WINNER - 2021, 2020, 2019, 2018, 2017, 2016, 2015, 2014 BEST OF HomeAdvisor Award***** Digital Living is a licensed California contractor, bonded and insured, with over 25 years of extensive technology experience. We make technology work! From high end custom homes to Class A commercial buildings, Digital Living provides our customers with today's latest technology solutions that connect and enhance their lives. "We work with the most discerning clients to those on a budget, who just want their technology just to work correctly." "In all cases we build trusting and lasting relationships with our clients because customer service is the cornerstone of what we do and who we are." Owner Derich Marsh. Some of the services we provide are: home theater, multi-zone audio-video, home automation, TV mounting, universal remote controls, wifi and wired networks as well as extensive experience in structured commercial and residential cabling. Give us a call today!

"Very friendly and thorough"

Cheri R on June 2022

****WINNER - 2021, 2020, 2019, 2018, 2017, 2016, 2015, 2014 BEST OF HomeAdvisor Award***** Digital Living is a licensed California contractor, bonded and insured, with over 25 years of extensive technology experience. We make technology work! From high end custom homes to Class A commercial buildings, Digital Living provides our customers with today's latest technology solutions that connect and enhance their lives. "We work with the most discerning clients to those on a budget, who just want their technology just to work correctly." "In all cases we build trusting and lasting relationships with our clients because customer service is the cornerstone of what we do and who we are." Owner Derich Marsh. Some of the services we provide are: home theater, multi-zone audio-video, home automation, TV mounting, universal remote controls, wifi and wired networks as well as extensive experience in structured commercial and residential cabling. Give us a call today!

"Very friendly and thorough"

Cheri R on June 2022


Avatar for Northbay Technology Company

Northbay Technology Company

P.O. Box 2086
5.00(
2
)
Approved Pro

Northbay Technology Company

P.O. Box 2086
5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
52 local quotes requested

Northbay Technology Company 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.

"This was the third company we contacted after having no follow through with the first two. I explained to Ramiro of Northbay Technology what our problem was. He had a technician here in a few days, he fixed the problem as well as giving us useful feedback on our system. Our streaming and dvd system work after not having it for almost 3 months! Ramiro also called afterwards to make sure everything was still working. What a treat to find a quality company that does what they say they’ll do and also offer great customer service."

Pamela K on November 2018

Northbay Technology Company 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.

"This was the third company we contacted after having no follow through with the first two. I explained to Ramiro of Northbay Technology what our problem was. He had a technician here in a few days, he fixed the problem as well as giving us useful feedback on our system. Our streaming and dvd system work after not having it for almost 3 months! Ramiro also called afterwards to make sure everything was still working. What a treat to find a quality company that does what they say they’ll do and also offer great customer service."

Pamela K on November 2018






Avatar for North Cal Security Inc

North Cal Security Inc

7 Wilms Ave
5.00(
1
)

North Cal Security Inc

7 Wilms Ave
5.00(
1
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

North Cal Security Inc is a company based in South San Francisco CA providing their customers CCTV Camera surveillance, Alarm Panels Systems, intercoms (Multi Dwelling Apartments and Condos), Access (Door) Control Systems, Network and Cabling Services and more! Serving: Daly City, CA; San Francisco, CA; San Mateo, CA; San Carlos, CA; Redwood City, CA Petaluma, CA; San Rafael, CA; Palo Alto, CA; San Jose, CA and all other surrounding Bay Area Cities. Over 30 Years Experience, Family Owned and Operated. Lifetime Camera Warranty Available, No Contracts or Monitoring Fees. Schedule Free Walkthroughs and Quotes. Honest Prices, Honest Service, Professional Work. http://northcalsecurity.com

"Fixed issues from a previous contractor. Very professional and easy to work with. Understood exactly what needed to be done and completed on time."

Evan D on July 2024

North Cal Security Inc is a company based in South San Francisco CA providing their customers CCTV Camera surveillance, Alarm Panels Systems, intercoms (Multi Dwelling Apartments and Condos), Access (Door) Control Systems, Network and Cabling Services and more! Serving: Daly City, CA; San Francisco, CA; San Mateo, CA; San Carlos, CA; Redwood City, CA Petaluma, CA; San Rafael, CA; Palo Alto, CA; San Jose, CA and all other surrounding Bay Area Cities. Over 30 Years Experience, Family Owned and Operated. Lifetime Camera Warranty Available, No Contracts or Monitoring Fees. Schedule Free Walkthroughs and Quotes. Honest Prices, Honest Service, Professional Work. http://northcalsecurity.com

"Fixed issues from a previous contractor. Very professional and easy to work with. Understood exactly what needed to be done and completed on time."

Evan D on July 2024

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Home Security Systems questions, answered by experts

Yes, you should always change your locks after buying a house. Do so as soon as possible after you move in. Otherwise, you won’t know who has working keys to the property, whether they’re spare keys or otherwise. If an intruder gains access to your house with a key, it may not be covered under your homeowners insurance.

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.

The cost of a home security system depends on the kinds of devices you install, but the average cost is about $750. Fully monitored systems with hardwired alarms, cameras, motion detectors, and lights will cost a lot more—up to $2,000. Meanwhile, a few wireless cameras that deliver video to an app will be significantly less expensive, starting at as little as $200.

The most secure lock for a front door is typically a deadbolt. There are many types of deadbolts to choose from, the most basic of which is the standard single-cylinder deadbolt. This is the lock you find installed on most front doors. For added security, you could go with a double-cylinder deadbolt, which requires a key to operate the lock from both the outside and the inside. 

Yes, evaluating needs based on home size, layout, and climate.

The Greenbrae, 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.