A portable and modular foundation that can be utilized to support a monopole includes a central hub and a plurality of legs. A proximal end of each leg is removably attached to the central hub. A plurality of floor panels extends from proximate the hub to a perimeter of the foundation and define a substantially uninterrupted floor. With the plurality of floor panels attached to the legs, the foundation can optionally be buried where the soil or other material is positioned on top of the floor panels to provide the necessary ballast to allow the foundation to retain a monopole with a piece of equipment in an elevated position. Alternatively, if the foundation is to be utilized above ground, a plurality of wall panels can be attached to the floor panels and the legs with braces to retain the wall panels in a substantially vertical position. The plurality of wall panels forms a substantially continuous wall about a perimeter of foundation such that ballast can be placed therein.