LGC Geotechnical Companies
  • Lawson & Associates Geotechnical Consulting Inc.
  • LGC Inland, Inc.
  • LGC Valley, Inc.


Three independent companies providing
full service geotechnical consulting


  • Grading Plan Reviews
  • Landslide Investigations
  • Forensic Evaluations
  • Fault Investigation
  • Field Density Testing
  • Expert Witness Testimony
  • Pavement Design
  • Seismic Analysis
  • Foundation Engineering
  • Settlement Analysis
  • Liquefaction Analysis
  • Slope Stability Analysis
  • Planned Community Design
  • Laboratory Testing
  • Earthquake Engineering

This website contains examples of work performed by different LGC companies. Specific experience varies from company to company.


We Also Provide Geotechnical Consulting for Homeowners
As experienced geotechnical consultants in Southern California, our geotechnical evaluation services are essential for those planning to purchase an existing home or home site, build a new custom home or add on to an existing home. Our engineering geologists and geotechnical engineers have the experience and knowledge to help you make the appropriate decisions with regard to your site geotechnical conditions. When planning to purchase an existing home or property, our research and site geologic reconnaissance services can aid in determining if a site has a history of distress related to geotechnical issues and/or if there is a potential for development of future issues. Where geotechnical distress is found, LGC has the knowledge and ability to design an appropriate mitigation for the issue.

Whether planning a new custom home or remodeling an existing one it is essential to have a good understanding of the local geotechnical conditions. LGC can help you avoid geotechnical issues that could affect the integrity and value of your property and home such as active faulting, landslides, slope stability, slope creep, liquefaction, expansive soils, corrosive soils, ground water seepage issues, and more. It is our job to analyze the site geology and the engineering properties of the site materials to provide the necessary data to the project civil engineer, architect, structural or foundation engineer to design the project appropriately in consideration of the site geotechnical conditions.

Those not familiar with the term geotechnical consultants may recognize us by other frequently used labels such as: soil engineers, soil technicians, or soil consultants. Whatever name you choose, we're definitely soil experts. Dirt testing is in our nature. In addition, our geotechnical evaluation reports are commonly referred to as: soils reports, geological investigations, geologic inspections or geotechnical investigations.

Are all geotechnical companies the same?
Absolutely not! When hiring a soil engineer to do your soil testing, (soil analysis) it is essential to hire a well established geotechnical company (soil testing company) that can provide a list of past and current references. LGC is one of the top soil testing companies in California and has an exemplary record – past and present.

The LGC Geotechnical Companies are located in:
• San Clemente, Orange County (OC), California.
• Murrieta, Riverside County, California
• Simi Valley, Ventura County, California