32 Price Considerations for a Foundation Nine: The cost for a concrete foundation can vary widely based on labor and material costs in your area. Quotes should always be based on site inspection as certain conditions can greatly affect cost such as: Slope A significant slope in your yard could mean the diff- erence between 2 yards of concrete and 5 yards and a few hours of labour for digging out a retaining wall. Ground quality Is there a presence of moisture or large rocks that will need to be fixed prior to laying the foundation? Will you need a mini excavator to clear the area? Accessibility Another factor to consider is how easily accessible is your yard? How will the contractor bring materials