Underground Contracting

Experience unparalleled efficiency and safety with our Underground Construction Services, providing durable and precision-engineered solutions for subterranean infrastructure.

Underground Construction Services

Utility Installation

Ensure reliable utility services with our expert underground installation, designed for minimal surface disruption and long-term stability.

We offer:
  • Conduit Systems for Cabling: Robust conduit system installations for electrical and communication cables to protect from environmental factors and human interference.

Directional Drilling

Utilize advanced directional drilling techniques to place utilities with minimal impact on the landscape and existing structures.

We offer:
  • Horizontal Directional Drilling (HDD): HDD services for the installation of underground pipes, conduits, and cables with precision and minimal ecological footprint.
  • Utility Boring: Non-disruptive boring techniques that allow for utility installation in congested areas without significant surface damage.

Manhole and Vault Construction

Construct and maintain access points to your underground utilities with our manhole and vault construction services for easy inspection and maintenance.

We offer:
  • Precast Manholes: Installation of precast manholes for durable and rapid access to underground utilities.
  • Custom Vaults: Custom-built vaults designed to house and protect critical connection points and utility controls.

When It’s Complicated, The Answer Is Simple. Sebastian!

For over 75 years, Sebastian Corp has provided exceptional electrical services in California.

Our team of highly trained, dedicated professionals will work closely with you to handle your electrical design, installation, troubleshooting, upgrade, and repair work.
Count on us for the most innovative solutions in electrical services.


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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 services.