Abstract: A plastic foundation system for quickly providing a structural foundation. The plastic foundation system includes plastic components having heating elements selectively embedded within for fusing abutting portions of adjacent components. The components include wall portions having a flange for insertion into the keyway of a base portion. The base portions can be segmented to provide adjustability to various angles. Heating elements are provided to fuse the segments of the adjustable base portion together. The base portion is also segmented with apertures to permit drainage through the base portion. In an alternate embodiment, connecting rods extend between adjacent wall portions.