In Centennial and the Greater Denver area, soil conditions—specifically the presence of expansive, bentonite-rich clay—are the primary drivers of total project costs. These soils influence expenses in the following ways:

• Required Depth: Centennial’s clay soils swell and shrink, requiring piers to reach stable, load-bearing strata to be effective. Steel push piers typically must be driven 25 to 60+ feet deep (often reaching bedrock or dense shale at 10 to 30 feet) to ensure stability. Because cost is heavily dependent on depth, deeper installations increase material and labor expenses.
• Installation Method and Equipment: Push piers use the structural weight of the home and heavy hydraulic equipment to reach deep strata, which often leads to higher mobilization and excavation costs. Conversely, helical piers are screwed in until specific torque readings are achieved (typically 15 to 35+ feet). They use lighter, more maneuverable equipment, which can be more cost-effective in areas where deep bedrock isn’t as easily accessible or where site access is tight.
• Soil Type Suitability: While push piers are often recommended for Centennial’s heavy clay and loam to provide deep anchoring, helical piers may be more cost-effective in sandy or loose soils or areas with high water tables where deep excavation is complicated.
• Custom Material Needs: The corrosive nature of Front Range soils may necessitate custom requirements, such as corrosion-resistant coatings or specific shaft diameters, which can increase material costs by 15% to 25%.

• Steel Push Pier vs Helical Pier Cost: Comparison Guide for Centennial