How Much Does a Geotechnical Report Cost?
A geotechnical report for a typical commercial project costs $3,000 to $8,000. Larger or more complex sites run $10,000-$25,000. The report is essential — it tells the structural engineer what the foundation can bear on.
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What determines the cost
Number of borings (typically 2-4 for small commercial, more for larger sites), boring depth (deeper = more expensive), laboratory testing scope, and site access difficulty. A flat, accessible site with 3 shallow borings is at the low end. A hillside site needing deep borings with extensive lab testing is at the high end.
What's in the report
Soil boring logs, laboratory test results (bearing capacity, expansion potential, corrosivity), groundwater observations, seismic site class, foundation recommendations, slab design parameters, retaining wall design values, and pavement section recommendations. The structural engineer cannot design foundations without this data.
When you can skip it (rarely)
Some jurisdictions allow presumptive soil bearing values from the building code for small, low-risk structures. But this means designing conservatively — thicker foundations, more concrete — which often costs more than the report would have. For any commercial project, get the report. It's cheap insurance.
The bottom line
Budget $3,000-$8,000 for a typical commercial geotechnical report. Skipping it means conservative (expensive) foundation design.
Torch Engineering PLLC · (480) 490-0064 · info@torchengineering.com — PE stamping backed by Apex Grid Engineering.