# Soil Stabilization Cost Factors > What drives soil stabilization cost: agent and rate, depth and area, mobilization, moisture, dust, testing, weather, haul-off avoided, access — and how to Canonical: https://kueselinc.com/guides/soil-stabilization-cost-factors Last updated: 2026-10-31 No two stabilization prices are built the same way, because no two sites are. This guide lists the factors that move a soil stabilization number up or down and explains how to put a stabilization bid and an undercut bid on equal terms. It gives no dollar figures; for a planning comparison on your own site, use our [stabilization vs. undercut tool](https://kueselinc.com/tools/stabilization-vs-undercut), and for how we price and build the work, see our [soil stabilization services](https://kueselinc.com/services/soil-stabilization). ## What drives the price ### Agent type and application rate Lime, cement and fly ash cost different amounts to buy and deliver, and the rate in the mix design sets how much of the agent goes into each area. ### Treatment depth and area Deeper treatment needs more agent and more mixing effort. Area matters both for total quantity and for how efficiently the work can run. ### Mobilization and minimum production Spreading and mixing equipment has to be brought to the site whatever the quantity, so small or scattered areas carry more mobilization per unit than large, continuous ones. ### Soil moisture and water needs Wet soils may need extra drying; dry soils may need water added to reach the target moisture. Either way, water supply and trucking are part of the cost. ### Dust control and occupied-site constraints Wind limits, neighbors, live traffic and occupied buildings can slow spreading and require extra dust control and phasing. ### Testing and mix design Lab mix design and field testing take time and coordination, and who pays for them should be clear in the bid documents. ### Weather and schedule Most specifications restrict work in freezing temperatures and high wind and require curing protection. A schedule that pushes work into marginal weather adds risk. ### Haul-off and import avoided The main reason to stabilize is often what it avoids: excavating poor soil, hauling it to a disposal site and importing replacement material. ### Access and phasing Tight sites, multiple phases and areas released one at a time each add moves and restarts. ## How to compare stabilization and undercut bids on equal terms - Price the same area and the same depth of poor soil for both options. - Include haul-off, disposal and import material in the undercut number, not just excavation. - Include the agent, spreading, mixing, water, compaction and fine grading in the stabilization number. - Make testing and mix design responsibility the same for both. - Compare schedule as well as price: trucking cycles and weather exposure differ between the two. - Ask what happens if conditions change in the field, and how each option is paid for. Our [lime vs. cement vs. undercut guide](https://kueselinc.com/guides/lime-vs-cement-vs-undercut) explains the technical side of the same decision. ## Questions ### Why is there no price per square yard in this guide? Because the drivers listed here vary so much from site to site that a general figure would mislead. Send the geotech report and plans and we can price your site. ### Is stabilization always cheaper than undercut? No. It often avoids haul-off and import, but deep soft zones, small scattered areas or unsuitable fill can favor undercut. Pricing both on equal terms is the way to know. This guide is general information from a site contractor, not engineering advice. The geotechnical engineer of record and the project specification govern the stabilizing agent, rate, depth and testing on your project. ## Related - [Request a bid](https://kueselinc.com/bid-invite) - [Lime vs. Cement vs. Undercut](https://kueselinc.com/guides/lime-vs-cement-vs-undercut) - [Stabilizing Building Pads and Paving Subgrade on St. Louis Clay](https://kueselinc.com/guides/stabilizing-building-pads-and-paving-subgrade-st-louis-clay) - [What Drives Site Development Cost in St. Louis](https://kueselinc.com/guides/site-development-cost-drivers) - [All resources](https://kueselinc.com/resources)