Commercial Electrical Contractor in Fresno, CA
Sebastian is a trusted commercial electrical contractor based in Fresno, delivering reliable services for commercial facilities across California. From new installations to electrical maintenance and repairs, our team brings technical skills and experience to every project.
Commercial Electrical Services
Sebastian proudly delivers commercial electrical services to Fresno and the Central Valley. With over 80 years of experience, we’ve built a reputation as a trusted partner for commercial buildings seeking reliable electrical solutions. From complex electrical projects to repairs and upgrades, our team brings deep technical skills and works with industry-leading manufacturers to ensure lasting performance.
Commercial Wiring
Ensure your business is powered by safe, efficient, and future-ready infrastructure. Our commercial wiring services cover everything from structured cabling to full-scale electrical retrofits. We utilize specialized equipment and partner with industry-leading manufacturers to deliver long-lasting performance and prevent issues like faulty wiring.
We offer:
- Structured Cabling: Dependable and organized cabling solutions that support data, voice, and video systems, ensuring seamless operations.
- Electrical Retrofitting: Up-to-date modifications to existing electrical systems, enhancing safety and efficiency without major disruptions.
- Surge Protection: Advanced surge protection systems to safeguard your business’s electronic equipment from unexpected power spikes.

Commercial Lighting Solutions
Illuminate your business with precision and efficiency using our tailored commercial lighting solutions. From energy-efficient upgrades to emergency lighting systems, we design and install lighting that supports safety, performance, and long-term savings.
We offer:
- Energy-Efficient Upgrades: Transition to energy-saving lighting options that reduce costs and support environmental sustainability.
- Emergency Lighting: Reliable and compliant emergency lighting installations to ensure safety during power outages.
- Exterior Lighting: Design and installation of outdoor lighting systems that enhance security and aesthetics of your commercial space.

Commercial Power Systems
Ensure safe and consistent power flow throughout your facility with our reliable power distribution services. From electrical panel installations and transformer setups to backup generator integration, we deliver comprehensive solutions using high-quality electrical equipment and proven technical skills to support your operations without interruption.
We offer:
- Electrical Panel Installation: Installation of high-performance electrical panels to manage power distribution effectively.
- Backup Generators: Implementation of backup generators to keep your business operational during power outages.
- Transformer Installations: Expert installation of transformers for appropriate voltage regulation and efficient power supply.

Electrical Control Systems
Maximize efficiency, safety, and smart functionality with Sebastian’s advanced Electrical Control Systems. We offer automated power switches for streamlined energy management, USB and smart outlets for modern connectivity, and outdoor motion sensors to enhance security and conserve energy. Our industrial-grade safety switches also ensure immediate power shut-off during emergencies, helping protect your team and your facility.
We offer:
- Automated Power Switches: Implement automated power switches to enhance operational efficiency with streamlined energy management.
- USB and Smart Outlets: Incorporate USB and smart outlets into your business for convenient charging and smart device integration.
- Outdoor Motion Sensors: Boost security and conserve energy with advanced outdoor motion sensors that illuminate your business environment on demand.
- Safety Switches: Elevate workplace safety with industrial-grade safety switches that provide immediate power cut-off in emergency situations.

When It’s Complicated, The Answer Is Simple. Sebastian!
For over 75 years, Sebastian Corp has been the trusted source as a commercial electrical contractor for businesses across California. From small upgrades to large-scale electrical projects, we bring unmatched experience and professionalism to every job.
Our team of highly trained experts works closely with commercial clients to deliver safe, efficient, and code-compliant solutions—whether it’s electrical design, installation, troubleshooting, system upgrades, or repairs. We’re committed to providing innovative electrical services that meet the unique demands of commercial facilities.
What Clients Say About Us
Sebastian was able to determine the issues and make recommendations for solving those problems. We would most definitely recommend Sebastian to other colleges or businesses because of their well-rounded yet technical knowledge base, outstanding customer service, and continuing evolution of technology awareness.
Sebastian is one of the best companies I have worked with from a customer standpoint.
Sebastian is a well-recognized and highly recommended local company and a leader in the technology industry. Sebastian employees were all very gracious, friendly and technically competent. They were very quick to address our concerns.
Sebastian did a great job and I would use them again to run or fix fiber optic cables. Their team was very professional and did very clean work.
Karlene was a pleasure to work with and kept me updated during the entire process until the job was complete. I’ve worked with others in this industry and none compare to her experience or her professionalism!!
We are extremely appreciative and impressed not only with the work Sebastian has completed at Fresno State so far this year, but also the flexibility and commitment. We continually hear great things about Sebastian and are very excited to work with us on a new campus wide Access Point project.
Recent Projects
700 P. Street
- Fresno, CA
- CommercialMunicipal
- Fire Alarms, Access Control, CCTV
Agrian
- Fresno, CA
- AgricultureCommercial
- A/V, Video Wall, Telephony, WAP + IT Room, Alarms, Access Control
Costco
- Clovis, CA + Elk Grove, CA
- Commercial
- Underground, Electrical, Low Voltage, Site Lighting, Traffic Light Signalization
Sunmaid Headquarters
- Fresno, CA
- AgricultureCommercial
- Access Control, CCTV, Structured Cabling, A/V
Fresno State Communications Loop
- Fresno, CA
- Education
- Fiber, Structured Cabling, Underground
Heritage Center
- Clovis, CA
- Commercial
- CCTV, A/V, Projectors + Screens, IT infrastructure, Fire Alarms, Lighting
Let's Get In Touch
Whether you’re a new or an existing customer, we’re here to talk about your business needs and answer any questions you may have about our commercial electrician services.