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Top-Rated Electrical wiring or panel upgrade pros in Brentwood - Updated Nov 2026

Avatar for Hamilton Electric
Hamilton Electric
4.9(
74
)
Electrical Wiring or Panel Upgrade

Serving Brentwood, CA and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

Hamilton Electric is a trusted electrical contractor serving residential, commercial, and industrial clients across the Bay and surrounding areas With over 15 years of experience, our licensed electricians specialize in electrical repairs, installations, panel upgrades, lighting solutions, EV charger installations, and energy-efficient retrofits. Whether you're building a new home or upgrading an office, we deliver reliable, code-compliant service on time and on budget. We proudly serve Oakley Ca and surrounding areas and are known for our commitment to safety, transparency, and customer satisfaction. \n

Charge controller
Charge controller
Charge controller
Charge controller
Charge controller

+40

Recommended by22%of homeowners
Avatar for Mister Sparky
Mister Sparky
4.8(
13
)
Electrical Wiring or Panel Upgrade

Serving Brentwood, CA and surrounding areas

Approved

Free estimates

Warranties offered

Small jobs welcome

At Mister Sparky®, we know how much you depend on electricity to power your daily life. Luckily, we’re experts when it comes to safeguarding against its inherent dangers and are ready to do the reliable work needed to ensure your home’s electrical systems work for years to come. \n \nOur highly trained, licensed electricians are professional troubleshooters who hunt potential hazards and fix them before they cause serious damage. We show up on time, guaranteed, and deliver 100% satisfaction guaranteed with every service call. And because we’re locally operated, our electricians are familiar with the challenges you might face.

21 neighbors recently requested a quote
Avatar for Dr. Wattz Electric
Dr. Wattz Electric
4.5(
24
)
Electrical Wiring or Panel Upgrade

Serving Brentwood, CA and surrounding areas

Approved

In business since 2015

Free estimates

Emergency services offered

"Robert did an excellent job installing LED ceiling lights in our family room. I couldn't be happier with the finished work. The installation was very neat and professional. I would not hesitate to call Robert again for any future work. I will be referring Robert to anyone that may need some electrical work."
Ceiling Fan & Track Lighting
Standard Ceiling Fan
Chandelier Over Kitchen Table
Exhaust Fan
Surface Mount Fixture

+16

Response time10 hrs
Recommended by100%of homeowners
Towers EC
5.0(
10
)
Electrical Wiring or Panel Upgrade

Serving Brentwood, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2002

Free estimates

Emergency services offered

"Totally Rewiring and new panel home built in 1947. Professional team on time answering all my questions. Kept me updated daily and what was planned for the next day Very detailed cleaned up throughout day Got the job done within agreed time and stayed on budget."
10 neighbors recently requested a quote
Recommended by30%of homeowners
Avatar for Perfect Star Heating , Cooling, & Electrical
Perfect Star Heating , Cooling, & Electrical
4.9(
351
)
Electrical Wiring or Panel Upgrade

Serving Brentwood, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2016

Free estimates

Emergency services offered

"Anthony was on time and worked solid until the job was completed. I asked him for advice on other electrical matters and he gave me a positive response and suggestions pertaining to them. He did the work very efficiently and was professional."
Lead Install Tech Gilbert Caceres w/New AC Install
Lead Install Tech Gilbert Caceres w/New AC Install
New Furnace Installation
Lead Installers David & Gill on the Job.
Lead Installer David Mendoza hard at work.

+8

Response time4 hrs
1746 neighbors recently requested a quote
Recommended by75%of homeowners
T-1 Electric, Inc.
4.5(
10
)
Electrical Wiring or Panel Upgrade

Serving Brentwood, CA and surrounding areas

Approved

In business since 2009

Free estimates

Credit card accepted

"Estimate I was given by a reputable handyman service was twice the amount that Tony actually charged me for the work. There were 3 fixtures and a troublesome GFCI outlet in my project. He took care of the work in about 2 hours (including the time to purchase the needed parts). His work was outstanding!"
Response time2 hrs
Recommended by100%of homeowners
Avatar for Atomic Telecomm & Electrical Inc.
Atomic Telecomm & Electrical Inc.
4.5(
9
)
Electrical Wiring or Panel Upgrade

Serving Brentwood, CA and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"Joe is hard working, diligent, and honest. I hired him 1) to put up an antenna for local tv service and 2) to fix poor wifi signals. TV was converted from cable rapidly using leftover wires. Saving $ not paying for cable and streaming off wifi. Great signal strength! WiFi was harder. He worked with ATT to determine my new iMac was sucking signals. He installed a more powerful router that solved wifi issues when iMac is off. Now I have to work with Apple to figure out how to manage the computer searching. I would not hesitate to call Joe back again. He is an excellent technician and a fine person. He is pretty busy, so sometimes it takes a few days before he can come out, but he is worth the wait."
Network Switch and Router
Driveway Camera
Backyard Camera's
Front Yard Camera
NW corner of house

+9

Response time1 day
Response rate85%
Recommended by87%of homeowners
...
Showing 1-10 of 235
FAQs for electrical wiring or panel upgrade projects in Brentwood, CA

Yes, a licensed electrician is essential for this project. Running an electrical service from the road to your house involves connecting to utility power lines, complying with national and local electrical codes, and safely handling high-voltage systems. 

Licensed professionals understand proper wire sizing, grounding requirements, and voltage drop calculations needed for safe installation. Most jurisdictions require permits and inspections that only certified professionals can obtain. The safety risks and potential for property damage make this project inappropriate for DIY attempts.

Overhead installations are less expensive than underground options. For a 1000-foot run, overhead service costs between $8,000 and $15,000, while underground service ranges from $10,000 to $25,000. 

Overhead lines require less labor and fewer materials since they don't need trenching or conduit. However, underground lines offer better protection from weather events and aesthetic benefits. Your decision should balance your budget constraints with long-term reliability and visual preferences.

You might need to upgrade your electrical panel depending on your power requirements. If your existing panel cannot handle the additional load from the extended service, upgrading to a 200-amp service (costing $750 to $2,000) may be necessary. 

A licensed electrician can evaluate your current system and determine if an upgrade is required. Factors include what you'll be powering at the end of the line, existing electrical demand, and whether voltage drop over the distance will affect performance.

Running electric service from the road to a house requires electrical permits from your local building department, costing between $500 and $2,000 depending on your location. You may also need excavation permits for trenching work if installing an underground service. Your utility company will have its own application process for connecting to its grid. A licensed electrical contractor can handle all the necessary permit applications as part of their service, ensuring your installation meets all local code requirements.

The Brentwood, 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.