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Find Electrical wiring or panel upgrade pros in Castro Valley

Baris Electric LLC

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Approved Pro

Baris Electric LLC

New on HomeAdvisorNew on HomeAdvisor
Approved Pro
19 years of experience
Free onsite estimate

Baris Electric 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 customer's interests, and make their concerns the basis of our business.

Baris Electric 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 customer's interests, and make their concerns the basis of our business.


Avatar for Atomic Telecomm & Electrical Inc.

Atomic Telecomm & Electrical Inc.

4.94(
8
)
Approved Pro

Atomic Telecomm & Electrical Inc.

4.94(
8
)
Approved Pro
Customers say: Quick response
36 years of experience
Free onsite estimate

We can take on a wide range of residential projects to include computer network or wiring, telephone, security system installs and a variety of other projects. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

"Job was tough due to small working space. They persisted and got the work done! Appreciated the extra help with cleanup and arranging the dryer for maximum efficiency."

Sheree L on November 2024

We can take on a wide range of residential projects to include computer network or wiring, telephone, security system installs and a variety of other projects. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

"Job was tough due to small working space. They persisted and got the work done! Appreciated the extra help with cleanup and arranging the dryer for maximum efficiency."

Sheree L on November 2024


Avatar for Bibiano Family Electric Inc. dba Golden Electric Services

Bibiano Family Electric Inc. dba Golden Electric Services

5.00(
2
)
Approved Pro

Bibiano Family Electric Inc. dba Golden Electric Services

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

At Bibiano Family Electric Inc we pride ourselves on being the best Electrical company in the area. We've built an excellent reputation for customer satisfaction by providing quick estimates, a great attention to detail, and competitive pricing. Being a screened and approved professional gives you the peace of mind you need to allow us to give your home the attention it deserves. Call us today and let's get started!

"They did an excellent job, very responsive, went out of their way to help and make recommendations. Work was done quickly, zero cleanup needed, will definitely use them for future projects."

Anthony F on March 2023

At Bibiano Family Electric Inc we pride ourselves on being the best Electrical company in the area. We've built an excellent reputation for customer satisfaction by providing quick estimates, a great attention to detail, and competitive pricing. Being a screened and approved professional gives you the peace of mind you need to allow us to give your home the attention it deserves. Call us today and let's get started!

"They did an excellent job, very responsive, went out of their way to help and make recommendations. Work was done quickly, zero cleanup needed, will definitely use them for future projects."

Anthony F on March 2023


JLL Electric Company

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Approved Pro

JLL Electric Company

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Approved Pro
5 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 CA ELECTRICAL GROUP 24/7

CA ELECTRICAL GROUP 24/7

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Approved Pro

CA ELECTRICAL GROUP 24/7

New on HomeAdvisorNew on HomeAdvisor
Approved Pro
24 years of experience
Free onsite estimate

CA ELECTRICAL GROUP 24/7 provides a wide range of electrical services including troubleshooting, electrical panel installs, service upgrades, complete rewiring, electrical safety inspections, new construction, remodeling projects, electric vehicle car charging stations and smart home integration. When you choose to work with CA ELECTRICAL GROUP 24/7, you will not be disappointed.

CA ELECTRICAL GROUP 24/7 provides a wide range of electrical services including troubleshooting, electrical panel installs, service upgrades, complete rewiring, electrical safety inspections, new construction, remodeling projects, electric vehicle car charging stations and smart home integration. When you choose to work with CA ELECTRICAL GROUP 24/7, you will not be disappointed.


Avatar for Boyes Electric Inc

Boyes Electric Inc

5.00(
4
)
Approved Pro

Boyes Electric Inc

5.00(
4
)
Approved Pro
Customers say: Quick response
36 local quotes requested
8 years of experience

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!

"My experience with Boyes Electric was truly professional; it was a smooth process, even though the project I gave them was quite challenging. The staff were very efficient, and even the difficult task was completed with ease. I am very happy to have found such a reliable company, thanks to the entire team."

Anthony on October 2025

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!

"My experience with Boyes Electric was truly professional; it was a smooth process, even though the project I gave them was quite challenging. The staff were very efficient, and even the difficult task was completed with ease. I am very happy to have found such a reliable company, thanks to the entire team."

Anthony on October 2025


Avatar for Dalcon, Inc.

Dalcon, Inc.

4.77(
77
)
Approved Pro

Dalcon, Inc.

4.77(
77
)
Approved Pro
Super Service Award
Customers say: True professional
42 local quotes requested
47 years of experience

Finding a licensed electrician that you can trust to service or repair your property can be difficult. While some electricians offer free consultations or other specials, they often do not have the skills or expertise necessary to efficiently perform the service you need. At Dalcon Electric, we have over 40 years of experience providing high-quality electrical services for our neighbors in San Jose and the surrounding areas. We are definitely able to take care of any electrical issues you run into big, or small!

"Work went well. Mods were well planned and made without complications. "

Patrick A on July 2025

Finding a licensed electrician that you can trust to service or repair your property can be difficult. While some electricians offer free consultations or other specials, they often do not have the skills or expertise necessary to efficiently perform the service you need. At Dalcon Electric, we have over 40 years of experience providing high-quality electrical services for our neighbors in San Jose and the surrounding areas. We are definitely able to take care of any electrical issues you run into big, or small!

"Work went well. Mods were well planned and made without complications. "

Patrick A on July 2025


SHORTBAR INC

5.00(
1
)
Approved Pro

SHORTBAR INC

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

We got our start in real estate, fixing restaurant equipment, lighting, and heaters for our business tenants. After four years, we started taking work as an independent general electrical contractor, and today, do a range of commercial and residential work including panel swaps, electric vehicle chargers, rooftop A/C units, etc. for single-family houses up to apartments, hotels, and strip centers. Our friendly and affordable techs are happy to install a new light over your kitchen table, but we also know our way around restaurants, daycares, and factories: three-phase wiring and motors, variable frequency drives, transformers, machine tools, and low-voltage communication and signaling (e.g. Ethernet). Prior to Shortbar, our owner worked nearly two decades developing software in Silicon Valley, and holds a master's degree in electrical engineering from the University of Illinois Urbana-Champaign. There isn't much we can't do--we look forward to serving you at Shortbar.

"Shortbar did a tricky install of a switched connection to an existing J-box in the concrete ceiling of my condo. If youâ ve owned a high-rise concrete place before, you know that can be tricky, but Shortbar figured out how to hook my new light fixture up to an existing 3-way switch and patched the holes where they had to open up the wall."

Caroline S on February 2024

We got our start in real estate, fixing restaurant equipment, lighting, and heaters for our business tenants. After four years, we started taking work as an independent general electrical contractor, and today, do a range of commercial and residential work including panel swaps, electric vehicle chargers, rooftop A/C units, etc. for single-family houses up to apartments, hotels, and strip centers. Our friendly and affordable techs are happy to install a new light over your kitchen table, but we also know our way around restaurants, daycares, and factories: three-phase wiring and motors, variable frequency drives, transformers, machine tools, and low-voltage communication and signaling (e.g. Ethernet). Prior to Shortbar, our owner worked nearly two decades developing software in Silicon Valley, and holds a master's degree in electrical engineering from the University of Illinois Urbana-Champaign. There isn't much we can't do--we look forward to serving you at Shortbar.

"Shortbar did a tricky install of a switched connection to an existing J-box in the concrete ceiling of my condo. If youâ ve owned a high-rise concrete place before, you know that can be tricky, but Shortbar figured out how to hook my new light fixture up to an existing 3-way switch and patched the holes where they had to open up the wall."

Caroline S on February 2024


"They called within minutes of posting needs and were at my door within an hour. Had parts on truck and finished job in about 30 minutes. Was polite and professional."

Scott M on December 2025

x

"They called within minutes of posting needs and were at my door within an hour. Had parts on truck and finished job in about 30 minutes. Was polite and professional."

Scott M on December 2025


Avatar for Perfect Star Heating and Air Conditioning

Perfect Star Heating and Air Conditioning

4.91(
265
)
Approved Pro

Perfect Star Heating and Air Conditioning

4.91(
265
)
Approved Pro
Super Service Award
Customers say: Quick response
959 local quotes requested
10 years of experience

With over 30 years of experience, Perfect Star Heating, Cooling, & Electrical is a locally owned and operated family business serving Alameda & Contra Costa County. We service all makes and models, offering top-quality comfort and energy efficiency solutions. Specializing in Furnace/Heating, Air Conditioning, and Ductless Mini-Split installation, we also provide repair and maintenance for Central HVAC systems, Ductwork, Indoor Air Quality, Electrical Repair & Installation, and Solar Installation. Free estimates are available for HVAC system replacement, new installations, and solar solutions. As a Lennox Premier Dealer, Daikin Comfort Pro, and WellAir Elite dealer, we are Diamond Certified, hold an A+ BBB Rating, and have been voted “The Best Heating & Air Company” and “The Most Community-Minded Company” by The Press in Brentwood, CA for two years. We are also SFGATE’s Best of the Bay Area Heating & A/C Service provider.

"They finished the job quickly and all is well. They were terrific."

Gaylord B on February 2026

With over 30 years of experience, Perfect Star Heating, Cooling, & Electrical is a locally owned and operated family business serving Alameda & Contra Costa County. We service all makes and models, offering top-quality comfort and energy efficiency solutions. Specializing in Furnace/Heating, Air Conditioning, and Ductless Mini-Split installation, we also provide repair and maintenance for Central HVAC systems, Ductwork, Indoor Air Quality, Electrical Repair & Installation, and Solar Installation. Free estimates are available for HVAC system replacement, new installations, and solar solutions. As a Lennox Premier Dealer, Daikin Comfort Pro, and WellAir Elite dealer, we are Diamond Certified, hold an A+ BBB Rating, and have been voted “The Best Heating & Air Company” and “The Most Community-Minded Company” by The Press in Brentwood, CA for two years. We are also SFGATE’s Best of the Bay Area Heating & A/C Service provider.

"They finished the job quickly and all is well. They were terrific."

Gaylord B on February 2026

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FAQs for electrical wiring or panel upgrade projects in Castro Valley, CA

While homeowners with substantial electrical knowledge might technically attempt a subpanel installation, most local building departments require permits and inspections for this type of work. Professional electricians understand local code requirements, can obtain necessary permits, and ensure the installation meets safety standards. Given the significant safety risks associated with incorrect electrical work, most homeowners benefit from hiring a licensed professional.

A standard subpanel installation takes an average of four to eight hours. This timeframe may extend if you're installing multiple subpanels or adding specialized circuits like those for spa equipment. Factors such as difficult access points, complex wiring paths, or permit processing times can also affect the overall project duration.

Adding a subpanel doesn't directly reduce electricity consumption or lower your utility bills. A subpanel simply redistributes power from your main panel to additional circuits. However, organizing your electrical system more efficiently may help prevent overloaded circuits and the associated problems. For actual cost savings, consider energy-efficient appliances and lighting instead.

The appropriate subpanel size depends on your specific electrical requirements. Consider the number and type of devices you'll be powering, potential future needs, and the capacity of your main electrical panel. An electrician can perform a load calculation to determine the most suitable amperage rating for your situation, ensuring you have adequate power without overpaying for unnecessary capacity.

A main electrical panel connects directly to your utility's power supply and contains your home's primary service disconnect. It distributes electricity throughout your entire house. A subpanel, by contrast, receives power from the main panel and redistributes it to a specific area of your home. Think of the main panel as the primary distribution point and the subpanel as a secondary branch that extends your electrical system's reach.

While electrical upgrades aren't as immediately visible as kitchen or bathroom renovations, they can contribute to your home's functionality and safety. Prospective buyers often appreciate updated electrical systems that can accommodate modern power demands. A properly installed subpanel that provides additional capacity for workshops, home offices, or future expansions could be an attractive feature for certain buyers, though the direct impact on home value varies by market.

The Castro Valley, CA homeowners’ guide to electrical wiring or panel upgrades

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