A pre-wire routing apparatus and method is provided during construction of a building to provide an inexpensive way to later install a wiring interconnect between first and second terminal locations. The apparatus includes a strand of flexible material, preferably string, which has an enlarged tail element at a trailing end and an enlarged head element connectable at a leading end. Fastening structure, such as a cable tie, is secured to the leading end to allow selected connection of the head element to the strand after the strand has been threaded along an interconnect pathway through an interior wall portion of the building. The fastening structure preferably forms a leader to facilitate installation, the tail element is a pull ring and the head element is a waisted rod. Protector sleeves may be positioned in openings, e.g., bores, formed in the internal framing elements, and, in an alternative embodiment, a sheath surrounds the strand. The method has the steps of forming openings through the internal framing elements to define an interconnect pathway between a pair of terminal locations through adjacent openings and the interior spaces between the framing elements, installing a flexible strand along the pathway and securing opposite ends of the strand at a respective terminal location.