A device and method for the creation of a water proof component void form unit to create space between concrete structures and expansive soil for the passage of utility conduit lines is described. The unit includes a plurality of panels interlocked with one or more connectors and supports that pass internally through flutes within the panel members. The void space is formed from a singular panel that is scored along a score line. The score line passes only through an upper surface. The panel member is folded about the lower surface at the score line to form the void space. The panels are located in a trench and configured to define a void space underground for the passage of the utility conduit lines. The unit is configured to resist soil expansive forces so as to protect the placement and integrity of the utility conduit lines.