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Avatar for ADT

ADT

4.66(
684
)
Approved Pro

ADT

4.66(
684
)
Approved Pro
Super Service Award
Customers say: Terrific value
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
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.

"A wonderful gentleman named Jake sold us our alarm system. Jake ended up installing the equipment as well. We enjoyed working with him and the alarm works well. We hope ADT recognizes him for his outstanding work and customer service. We really appreciate it."

Jackie J on December 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.

"A wonderful gentleman named Jake sold us our alarm system. Jake ended up installing the equipment as well. We enjoyed working with him and the alarm works well. We hope ADT recognizes him for his outstanding work and customer service. We really appreciate it."

Jackie J on December 2025


RSB Construction Group Inc.

New on AngiNew on Angi
Approved Pro

RSB Construction Group Inc.

New on AngiNew on Angi
Approved Pro
4 years of experience
Free onsite estimate

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!


Avatar for Control Fire, Inc.

Control Fire, Inc.

3.50(
6
)
Approved Pro

Control Fire, Inc.

3.50(
6
)
Approved Pro
9 years of experience
Free onsite estimate

Control Fire specializes in the design and installation of residential fire protection systems. We handle everything from detached garages, ADUs, single family homes, large multi-family projects, Hotels, etc. We provide a full range of services including design, consulting, installation, repair and testing We'd sure appreciate a chance to serve your fire protection needs.

"I've worked with Jason in the past and as always he did a great job with the installation of our fire sprinkler system for a new construction build in Redwood City. I highly recommended Control Fire's services and I wouldn't hesitate to hire them again."

Omar G on September 2022

Control Fire specializes in the design and installation of residential fire protection systems. We handle everything from detached garages, ADUs, single family homes, large multi-family projects, Hotels, etc. We provide a full range of services including design, consulting, installation, repair and testing We'd sure appreciate a chance to serve your fire protection needs.

"I've worked with Jason in the past and as always he did a great job with the installation of our fire sprinkler system for a new construction build in Redwood City. I highly recommended Control Fire's services and I wouldn't hesitate to hire them again."

Omar G on September 2022


Spaghetti Networks, Inc.

New on AngiNew on Angi
Approved Pro

Spaghetti Networks, Inc.

New on AngiNew on Angi
Approved Pro
24 years of experience
Free onsite estimate

Spaghetti Networks INC 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!

Spaghetti Networks INC 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!


Accel Fire Protection Services

New on AngiNew on Angi
Approved Pro

Accel Fire Protection Services

New on AngiNew on Angi
Approved Pro
17 years of experience
Free onsite estimate

With an unrivaled commitment to excellence Accel Fire Protection Services is the unrivaled leader in fire protection services in the bay area. We are prepared for any demand that our customers may have, from the smallest repair to large commercial installation, we are ready for it all. Having spent years in the industry we have developed techniques to allow us to offer the most competitive pricing, the quickest turnaround, and the highest standards of any company in the area. Call us today and let us get to work for you! Our services includes: 1. Design and install fire sprinklers for residential and commercial, new construction or tenant Improvement. 2. Design and install Fire Suppression System for kitchen hood. 3. Design and install private fire Hydrant 4. Inspect, test, repair, and certify existing fire protection systems (Quarter, annual, 5-Year inspection and certifications)

With an unrivaled commitment to excellence Accel Fire Protection Services is the unrivaled leader in fire protection services in the bay area. We are prepared for any demand that our customers may have, from the smallest repair to large commercial installation, we are ready for it all. Having spent years in the industry we have developed techniques to allow us to offer the most competitive pricing, the quickest turnaround, and the highest standards of any company in the area. Call us today and let us get to work for you! Our services includes: 1. Design and install fire sprinklers for residential and commercial, new construction or tenant Improvement. 2. Design and install Fire Suppression System for kitchen hood. 3. Design and install private fire Hydrant 4. Inspect, test, repair, and certify existing fire protection systems (Quarter, annual, 5-Year inspection and certifications)


Home Theater and Satellite

4.67(
112
)
Approved Pro

Home Theater and Satellite

4.67(
112
)
Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
28 years of experience

Home Theater and Satellite was officially established in 1997, but we have far more years of experience behind us. Do you need your home theater system upgraded? Would you like a new telephone system installed? We can do it all! With Home Theater and Satellite, you can be sure you will have the options you want and the customer service that you deserve. Currently with ServiceMagic, we are specializing in, but are definitely not limited to; antenna installation, replacement, or repair, home theater systems or media centers, satellite dish systems installation and repair, telephone jacks, wiring, and telephone system installation. I, Mark Zarzycki, got into business for myself over ten years ago with one goal in mind, and that is to make people happy and keep them happy so they want to repeat business with me. My current repeat customer base is a testament, as well as a compliment, to the hard earned efforts of past projects. This is why I go the extra mile for my clients and guarantee their satisfaction. You can rest assured that Home Theater and Satellitewill meet and exceed all of your expectations and will communicate with you so we understand your needs. Please feel free to contact Home Theater and Satellite to learn more about the services we offer or to work with a professional to set a convenient appointment. Thank you for your interest and we look forward to working with you.

"EXCELLENT JOB. MADE CREATIVE USE OF SUPPLIES AND HAD ALL TOOLS NECESSARY TO DO THE JOB. EXCELLENT!"

Ed S on July 2025

Home Theater and Satellite was officially established in 1997, but we have far more years of experience behind us. Do you need your home theater system upgraded? Would you like a new telephone system installed? We can do it all! With Home Theater and Satellite, you can be sure you will have the options you want and the customer service that you deserve. Currently with ServiceMagic, we are specializing in, but are definitely not limited to; antenna installation, replacement, or repair, home theater systems or media centers, satellite dish systems installation and repair, telephone jacks, wiring, and telephone system installation. I, Mark Zarzycki, got into business for myself over ten years ago with one goal in mind, and that is to make people happy and keep them happy so they want to repeat business with me. My current repeat customer base is a testament, as well as a compliment, to the hard earned efforts of past projects. This is why I go the extra mile for my clients and guarantee their satisfaction. You can rest assured that Home Theater and Satellitewill meet and exceed all of your expectations and will communicate with you so we understand your needs. Please feel free to contact Home Theater and Satellite to learn more about the services we offer or to work with a professional to set a convenient appointment. Thank you for your interest and we look forward to working with you.

"EXCELLENT JOB. MADE CREATIVE USE OF SUPPLIES AND HAD ALL TOOLS NECESSARY TO DO THE JOB. EXCELLENT!"

Ed S on July 2025


Avatar for LANgineers

LANgineers

5.00(
1
)
Approved Pro

LANgineers

5.00(
1
)
Approved Pro
32 years of experience
Free onsite estimate

LANgineers has been delivering high-tech, IT Firepower services to businesses since 1993. We offer Surveillance Systems, including AI to detect loitering, concealment, consumption, Live Guard Services; Hosted VoIP Phone Systems, Wi-Fi Distribution, ISP both Backup and Primary, Multi-tenant Door Phones; Building to Building Radio Links, small solar power fr cameras and WiFi; Privately owned, LANgineers corporate offices are located in the San Francisco Bay Area. Even though we're brand new to Anji, we've been around for 32 years.

"LANgineers did an outstanding job installing our new business phone system! From start to finish, their team was professional, courteous, and incredibly knowledgeable. The installation was smooth and efficient, and they took the time to ensure everything was working perfectly before wrapping up. Their customer service was excellent - responsive, patient, and truly focused on making sure we were happy. Highly recommend LANgineers to any business looking for reliable communication solutions!"

Dominica L on October 2025

LANgineers has been delivering high-tech, IT Firepower services to businesses since 1993. We offer Surveillance Systems, including AI to detect loitering, concealment, consumption, Live Guard Services; Hosted VoIP Phone Systems, Wi-Fi Distribution, ISP both Backup and Primary, Multi-tenant Door Phones; Building to Building Radio Links, small solar power fr cameras and WiFi; Privately owned, LANgineers corporate offices are located in the San Francisco Bay Area. Even though we're brand new to Anji, we've been around for 32 years.

"LANgineers did an outstanding job installing our new business phone system! From start to finish, their team was professional, courteous, and incredibly knowledgeable. The installation was smooth and efficient, and they took the time to ensure everything was working perfectly before wrapping up. Their customer service was excellent - responsive, patient, and truly focused on making sure we were happy. Highly recommend LANgineers to any business looking for reliable communication solutions!"

Dominica L on October 2025


Avatar for L N S

L N S

4.65(
36
)
Approved Pro

L N S

4.65(
36
)
Approved Pro
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
10 local quotes requested

L N S invites you to experience a tradition of customer satisfaction that will exceed your greatest expectations. Our professionalism and quality workmanship will accurately reflect your taste and lifestyle. From conception to completion, we work with you until the job is done. We thrive to take care of all of our clients unique needs. We are ethical, honest and easy to communicate with. Call us today you will be pleased you did. Thank you!

""

Thomas A on April 2024

L N S invites you to experience a tradition of customer satisfaction that will exceed your greatest expectations. Our professionalism and quality workmanship will accurately reflect your taste and lifestyle. From conception to completion, we work with you until the job is done. We thrive to take care of all of our clients unique needs. We are ethical, honest and easy to communicate with. Call us today you will be pleased you did. Thank you!

""

Thomas A on April 2024


Avatar for TECHINSF CONSULTING LLC

TECHINSF CONSULTING LLC

5.00(
5
)
Approved Pro

TECHINSF CONSULTING LLC

5.00(
5
)
Approved Pro
28 local quotes requested
22 years of experience

We specialize in professional Low-Voltage Wiring for homes and businesses, including Ethernet and phone cabling, speaker wiring, coax, fiber, underground wiring, and wire testing. In addition to clean, reliable cabling, we also offer full-service IT support, from WiFi systems and networking to cloud services, desktop help, and security solutions. Whether you need structured cabling, door access systems, TV mounting, or expert IT help, we deliver fast, dependable service with both remote and on-site options.

We specialize in professional Low-Voltage Wiring for homes and businesses, including Ethernet and phone cabling, speaker wiring, coax, fiber, underground wiring, and wire testing. In addition to clean, reliable cabling, we also offer full-service IT support, from WiFi systems and networking to cloud services, desktop help, and security solutions. Whether you need structured cabling, door access systems, TV mounting, or expert IT help, we deliver fast, dependable service with both remote and on-site options.


Avatar for All Systems Approved, Inc.

All Systems Approved, Inc.

5.00(
13
)
Approved Pro

All Systems Approved, Inc.

5.00(
13
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
7 years of experience

ALL SYSTEMS APPROVED, INC is a family owned and operated Fire Sprinkler Design and Installation company. We specialize in Fire Protection for homes and businesses in the Bay Area, and are expert in protecting many custom projects. We look forward to building long-term relationships with our clients and guarantee your satisfaction! Our President, Edgar A. Hernandez, has over 40 years experience in the fire protection industry, particularly in Design, which is why we get ALL SYSTEMS APPROVED! Edgar's wife, Tracy Hernandez, handles Estimating & Administration. Daughter Sofia assists with Administrative Services and handles Project Management. Daughter Mikaela & grandson Billy perform design & calculations. And Mikaela performs surveys & inspections. You can see an Independent Review of our company here: https://www.buildzoom.com/contractor/all-systems-approved-inc# Or here: https://www.homeadvisor.com/rated.ALLSYSTEMSAPPROVEDINC.101649073.html

"The technician Was prompt, courteous and efficient. Weâ ll use them again."

Lucille Z on April 2024

ALL SYSTEMS APPROVED, INC is a family owned and operated Fire Sprinkler Design and Installation company. We specialize in Fire Protection for homes and businesses in the Bay Area, and are expert in protecting many custom projects. We look forward to building long-term relationships with our clients and guarantee your satisfaction! Our President, Edgar A. Hernandez, has over 40 years experience in the fire protection industry, particularly in Design, which is why we get ALL SYSTEMS APPROVED! Edgar's wife, Tracy Hernandez, handles Estimating & Administration. Daughter Sofia assists with Administrative Services and handles Project Management. Daughter Mikaela & grandson Billy perform design & calculations. And Mikaela performs surveys & inspections. You can see an Independent Review of our company here: https://www.buildzoom.com/contractor/all-systems-approved-inc# Or here: https://www.homeadvisor.com/rated.ALLSYSTEMSAPPROVEDINC.101649073.html

"The technician Was prompt, courteous and efficient. Weâ ll use them again."

Lucille Z on April 2024

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Home Security Systems questions, answered by experts

The average cost of a home security system is about $700, ranging from $280 to $1,150. Costs to consider include equipment, surveillance fees, and other additional features. Cost factors that determine your system’s price include the type of security system, materials, labor, activation fees, monthly fees, and permits. Additional features and upgrades may include:

  • Video surveillance monitoring: $40–$65 per month

  • Smart home locks: $150

  • Smart home lighting: $15–$90

  • Smart smoke, fire, and carbon monoxide alarms: $35–$100

  • Smart thermostat: $130–$500

Changing the alarm in your wireless security system is a perfectly reasonable DIY task that most people can complete on their own. Simply open the system’s control panel, remove the existing battery, and replace it with a new one. If you’re using a wired system, this may require disconnecting and reconnecting both the positive and negative wires attached to the battery, and you may want to call in a professional to help. 

Home automation costs an average of $1,000, and most projects fall between $200 and $2,000. The total cost will depend largely on the level of automation you want in your home. High-tech, all-inclusive systems can cost well over $10,000 for larger homes, so most homeowners set a budget and then provide that to an expert to get the best results. You can also opt for DIY home automation technology for between $100 and $500, but the scope and interaction between products are usually limited.

Your best bet is to install a bracket that secures to the bottom of the unit and the side of your house. You should still secure the AC unit in the open window using some of the other methods already listed, but a bracket is best to ensure that it stays put—both during operation and in case of an attempted theft.

Instead of a security door, you might opt for a heavy-duty screen door made from durable mesh, which allows better sunlight and airflow. Additionally, you could enhance security by installing strong locks on your existing door. A double-cylinder deadbolt provides robust security; however, be aware that some local laws prohibit them due to safety concerns during emergencies.

The Redwood City, CA homeowners’ guide to home security system services

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