Commercial Electrical Contractor in Fresno, CA
Commercial Electrical Services
Sebastian proudly delivers commercial electrical services to Fresno and the Central Valley. Since 1946, 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.
- Standby Generators: Standby generator installation, transfer switches, and service to keep your business running 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.
Standby Generator Installation and Service in Fresno
A standby generator keeps a business running when utility power fails, but only if it’s sized for the right loads and connected through the right transfer equipment. Sebastian installs and services standby generators for commercial and industrial facilities in Fresno and across the Central Valley.
A standby generator project typically covers:
- Load assessment. Deciding which systems must stay on during an outage (refrigeration, servers, lighting, life-safety equipment, production lines) and sizing the generator to match.
- Transfer switch installation. An automatic transfer switch detects a utility outage, starts the generator, and shifts designated circuits to generator power without anyone flipping a switch.
- Electrical integration. Tying the generator into the building’s service, panels, and distribution, including any upgrades the existing gear needs.
- Permitting and inspection. Coordinating permits and inspections with the local jurisdiction.
- Testing and maintenance. Scheduled exercise runs, load testing, and inspections so the generator starts when it’s actually needed.
For a deeper look at the options, see our guides to commercial backup generator types and why businesses invest in a backup generator.
Industrial Electrical Services for Central California Facilities
Industrial facilities put heavier, more continuous demands on an electrical system than a typical office or retail space. Packing houses, food processing plants, cold storage, distribution centers, and manufacturing floors in the Central Valley depend on three-phase power, dedicated equipment circuits, and electrical systems that can be maintained without shutting down production.
Sebastian provides industrial electrical services including:
- Three-phase power distribution for motors, compressors, and production equipment (three-phase vs. single-phase power explained)
- Equipment and machinery circuits, disconnects, and safety switches
- Service upgrades and panel work as facilities add equipment or expand (commercial electrical panel upgrades)
- Industrial and high-bay lighting, inside and out
- Arc flash and electrical safety support, so facility teams know the hazards at each piece of equipment (what an arc flash study involves)
- Scheduled maintenance and repair planned around production schedules
Learn more about how we support industrial facilities and agricultural operations.
Electrical Remodeling and Tenant Improvement Build-Outs
Remodeling a commercial space almost always means reworking its electrical system. New floor plans move outlets, lighting, and data drops, new equipment adds load, and older buildings often need panel or service upgrades to support how the space will be used now.
Sebastian handles electrical remodeling for offices, retail, medical suites, and industrial spaces, from design coordination with the architect and general contractor through permitting, installation, and final inspection. For landlords and tenants planning a build-out, our guide to tenant improvement electrical work explains who typically handles what.
Surge Protection for Commercial Equipment
A single power surge can damage servers, controls, refrigeration, and production equipment, and the damage often isn’t obvious until a component fails weeks later. Sebastian designs layered commercial surge protection, starting at the electrical service entrance and continuing through distribution panels to sensitive equipment, so each stage limits what reaches the next. Read what happens to a business after a power surge to see why whole-facility protection matters.
Emergency Electrical Service and Maintenance Programs
When a commercial electrical failure takes down power, lighting, or equipment, Sebastian’s electricians provide 24/7 emergency service to find the problem, make the space safe, and restore power as quickly as conditions allow. See our electrical troubleshooting guide for common problems and warning signs.
The best way to reduce emergency calls is scheduled maintenance. A commercial electrical maintenance program inspects, tests, and services panels, connections, lighting, and critical equipment on a set schedule, and catches loose connections, overheating, and worn components before they cause an outage.
Commercial Electrical Contractor Serving Fresno, Central California, and Beyond
Sebastian is headquartered in Fresno and has served California businesses since 1946. Our commercial electrical contractors work throughout Fresno and Clovis and across Central California, with local offices that also support projects farther north.
Areas we serve include:
- Fresno and Clovis, from downtown offices to industrial parks
- Kerman and the west Fresno County communities, where Sebastian began in 1946
- Central California, including the wider Central Valley
- Modesto and Stanislaus County, along the Highway 99 corridor
- Sacramento and the surrounding region, supported from our Sacramento office
- Foresthill and the Sierra foothills, supported from our Foresthill office
- Projects across California for multi-site and institutional clients, such as Costco locations in Clovis and Elk Grove
As a licensed California electrical contractor (CSLB License No. 940822), Sebastian takes on projects ranging from single-suite repairs to multi-building commercial and public-sector work.
Commercial Electrical FAQ
What does a commercial electrical contractor do?
A commercial electrical contractor designs, installs, maintains, and repairs electrical systems in businesses and institutional buildings. That includes power distribution, panels and service upgrades, lighting, standby generators, surge protection, and code-compliant wiring for offices, retail, healthcare, education, and industrial facilities, along with the permits and inspections that commercial work requires.
Does Sebastian provide industrial electrical services?
Industrial electrical services are part of Sebastian’s commercial electrical work, including three-phase power distribution, equipment circuits, panel and service upgrades, industrial lighting, and scheduled maintenance for plants, packing houses, cold storage, and distribution facilities across Central California.
Can Sebastian install a standby generator for my business?
Standby generator installation for businesses is one of Sebastian’s core electrical services. A typical project includes a load assessment, generator sizing, automatic transfer switch installation, integration with the building’s electrical system, permitting, and ongoing testing and maintenance.
Does Sebastian offer 24/7 emergency electrical service?
Emergency electrical service from Sebastian is available 24/7 for commercial customers dealing with power loss, equipment failures, or electrical hazards. For non-emergency work, a scheduled maintenance program helps reduce the chance of an unplanned outage.
What areas does Sebastian serve for commercial electrical work?
Commercial electrical work from Sebastian covers Fresno, Clovis, Kerman, Modesto, and the wider Central Valley, plus Sacramento and Foresthill through Sebastian’s offices there. Sebastian also handles projects elsewhere in California for multi-site and institutional clients.
Is Sebastian a licensed electrical contractor in California?
Sebastian is a licensed California contractor, CSLB License No. 940822. Commercial clients and public agencies can verify a contractor’s license status directly through the Contractors State License Board’s online license lookup before awarding work.
Commercial Electrical Resources
When It’s Complicated, The Answer Is Simple. Sebastian!
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
Start Your Commercial Electrical Project
Every commercial electrical project starts with understanding the building, the equipment it needs to support, and the schedule the work has to fit around. A site visit gives our team what it needs to scope the work accurately and plan around your operations.
To schedule a site visit or request a quote, request a proposal or call (559) 316-5179.
