Bay Area underground construction

Utility Hookups, Trenching, Grading, and Excavation

Golden State Underground handles the underground work behind residential and commercial projects: utility connections, sewer laterals, storm drains, PG&E gas line trenching, electrical conduit, grading, shoring, foundations, septic systems, and hauling.

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Utility Hookups

Water, sewer, gas, electric, and conduit trenching for new construction, additions, ADUs, and remodels.

Sewer Laterals

New sewer lateral installation and replacement, including trenching, connection work, and inspection coordination.

Storm Drains

Drainage systems, trench drains, and site drainage improvements that move water away from structures.

Grading and Excavation

Site preparation, land leveling, trenching, basement excavation, and dirt hauling for construction-ready lots.

Foundations and Shoring

Foundation excavation, temporary shoring, bracing, and structural support for safe underground work.

Septic Systems and Hauling

Septic installation for properties outside municipal sewer service, plus dirt, debris, and material hauling.

Serving the Greater San Francisco Bay Area

We serve San Jose, Santa Clara, Sunnyvale, Fremont, Oakland, and nearby cities. Call +1 (408) 910-2861 or use the contact form to confirm availability for your project location.

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