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Geotechnical & Soil Engineering Services in San Jose, CA
South Bay / Santa Clara County
We provide geotechnical soil investigations across San Jose and the greater South Bay, helping homeowners and contractors navigate the city's building code requirements for new construction, additions, ADUs, and retaining walls.
San Jose's building code (Chapter 18/18A, Soils and Foundations, and Appendix F, Soils, Geology and Geologic Hazards) reflects the range of ground conditions found across the city — from expansive clay in older inland neighborhoods to areas closer to the Bay that fall within state-mapped liquefaction hazard zones. A site-specific soil investigation identifies which conditions apply to your lot so your foundation design and permit application account for them from the start.
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