Welcome to Golden State Underground
Specializing in California building best practices and servicing the greater San Francisco Bay Area.
Contact for a Quote
Specializing in California building best practices and servicing the greater San Francisco Bay Area.
Contact for a QuoteWater, sewer, gas, and electric connections for new construction and remodels.
New installation and replacement to keep your property connected and code-compliant.
Drainage systems that protect your property from water accumulation and flood damage.
Underground conduit runs for safe, code-compliant power delivery to your property.
Gas line installation and connection for residential and commercial service.
Full septic installation for properties beyond municipal sewer reach.
Site preparation, land leveling, and drainage grading for construction-ready lots.
Residential and commercial foundations built to California seismic standards.
Full basement excavation and construction, including waterproofing and structural support.
Temporary and permanent shoring to protect excavations and adjacent structures.
Dirt, debris, and material hauling to keep your job site clean and on schedule.
Golden State Underground is a family-owned underground construction company serving the greater San Francisco Bay Area since 2018. We specialize in utility connections, foundations, grading, and excavation work built to California's strict building standards.
Every project gets our full attention, from the initial site walk to final inspection. We believe in straightforward communication, honest estimates, and work that passes inspection the first time.