Before the foundation is poured, there is a lot of work to do. The site must be graded and excavated and the foundation laid out according to the plot map. Rough plumbing is installed and inspected and, finally, the foundation for the house, garage and porch is poured.
As with all aspects of construction, weather can play a part in foundation delays. Improper grading and drainage can undermine a foundation from the beginning. Be sure to have the foundation thoroughly checked by your own inspector.