How Much Does a Geotechnical Report Cost? [2025 Data]

This article was created using automation technology and thoroughly fact-checked and edited by an Angi Editor in accordance with our AI policy.

On average, a geotechnical report costs between $1,000 and $5,000, with most homeowners spending an average of $2,700. Prices depend on site size, soil conditions, and the level of testing required. 

A geotechnical report is a crucial first step before building. It protects your investment by identifying soil issues, groundwater concerns, and site-specific risks. Understanding the costs involved helps you plan confidently and avoid surprises.

Geotechnical Report Cost Factors

Several key factors influence geotechnical report cost, from the type of report you need to the size and complexity of your property.

Types

Geotechnical reports come in different types, each designed for a specific purpose and level of detail. A basic report often covers simple residential builds, while advanced reports are required for large or complex projects. Preliminary investigations are less expensive but may not satisfy all regulatory requirements. Specialized studies, such as slope stability or liquefaction analysis, cost more due to the advanced testing and expertise involved.

A more detailed or custom report is needed when the site presents unusual challenges, such as building on a steep hill, near water, or in an area prone to earthquakes.

Property Size

The size of your property directly affects geotechnical report cost. Small lots require fewer soil borings and less testing, while large parcels or multi-acre developments increase both the number of samples and the amount of analysis needed. Each additional boring or test pit adds to the total price, especially if site access is challenging.

Materials

While geotechnical reports are primarily service-based, there are some materials and lab testing costs to consider. Sample collection materials, such as drilling or coring supplies, are required for obtaining soil and rock samples. Lab fees for analyzing these samples can add $100 to $200 per hour. Homeowners may also pay extra for additional report copies or digital files.

Labor

A range of professionals contribute to geotechnical reports. Geotechnical engineers, field technicians, and drill operators all play a role. Hourly rates for geotechnical engineers range from $100 to $250, while technicians earn $40 to $100 per hour. 

Labor costs vary by region and market demand, and complex projects require more labor hours. Expedited or after-hours service can increase labor charges significantly.

Prep

Preparing the site for a geotechnical investigation involves clearing vegetation and ensuring access for drilling equipment. Fees for utility locating or marking the site before drilling range from $200 to $500. 

Some municipalities require permits for soil investigations, adding to your costs. Sites with difficult access, such as steep slopes or remote locations, may have higher prep and mobilization fees. Coordination and scheduling for multi-day investigations can also add to the total.

Additional Cost Factors

Several additional factors can increase your geotechnical report cost:

• Demolition or removal of existing structures for site access.

• Site restoration or cleanup after the investigation.

• Permit and inspection fees related to geotechnical work.

• Supplemental engineering analysis or foundation recommendations.

• Installation of groundwater monitoring wells or environmental testing.

• Decorative or presentation add-ons, such as bound reports or expedited shipping.

• Follow-up site visits or additional testing if site conditions change.

Geotechnical Report Ongoing Costs

While most geotechnical reports are a one-time expense, there are a few ongoing or repeat costs to consider in specific situations.

Maintenance

Standard geotechnical reports do not require maintenance. However, follow-up testing or periodic site monitoring may be necessary if the site is prone to changes, such as settlement or groundwater fluctuations. Installing settlement gauges or groundwater monitoring equipment can cost $500 to $2,000, with additional fees for periodic checks. 

Re-Testing

If initial findings are inconclusive, supplemental investigations or additional soil borings may be needed, costing $300 to $900 per hole or more. Re-testing due to unexpected site conditions or changes in the project scope can add similar expenses. Revising or updating the report after significant project changes costs $250 to $2,500, depending on the extent of the revisions.

Insurance

Professional liability insurance for geotechnical engineers is often included in the service fee. Homeowners may consider additional insurance to cover unforeseen site issues discovered after the report. If the report identifies significant risks, your builder or lender may recommend extra coverage, depending on the site and policy terms.

DIY Geotechnical Report Cost vs. Hiring a Pro

Attempting a DIY geotechnical report presents significant challenges and risks. Proper soil testing and analysis require specialized skills, certifications, and equipment. Renting drilling equipment alone can cost $500 to $1,500 per day. Homeowners without professional training are unlikely to obtain accurate or regulatory-compliant results.

Legal requirements for certified geotechnical reports are strict. Most jurisdictions require a licensed professional engineer to prepare and sign the report. DIY attempts can delay your project, lead to rejected permits, or expose you to liability if structural issues arise later. While DIY soil testing may seem less expensive, the risks and potential for costly mistakes far outweigh the savings.

Not using a professional can extend your project timeline and result in additional costs to correct mistakes or redo the report. For nearly all homeowners, working with a licensed geotechnical engineer is the best way to ensure safe, reliable results.

Cost of Common Geotechnical Report Add-Ons

Several optional services can increase your geotechnical report cost. Common add-ons include:

• Additional soil borings or deeper test holes: $300–$900 per hole

• Site-specific recommendations (seismic, slope stability analysis): $1,500 to $5,000

• Environmental assessments or groundwater monitoring: $500 to $2,000

• Follow-up site visits or consultations: $300 to $1,500 per visit

Discuss the need for these services with your engineer to avoid unnecessary expenses.

Tips to Reduce Cost While Getting a Geotechnical Report

You can manage your geotechnical report cost by planning ahead and making informed choices:

• Obtain multiple quotes from licensed local soil testers.

• Clearly define the project scope to avoid unnecessary testing.

• Schedule the investigation during standard business hours to avoid overtime charges.

• Prepare the site in advance to minimize access or prep fees.

• Bundle geotechnical services with other site assessments (environmental, topographic).

• Request digital-only reports to save on printing and shipping.

• Limit the number of borings to what is required for your project.

• Ask about group rates for multiple lots or neighboring properties.

Taking these steps helps ensure you get the necessary information without overspending.

How Angi Gets Its Cost Data

Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We extensively research project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We rely on reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects. 

Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.