A system and method for a secondary water drainage system with street level leak detection positioned between spaced apart prefabricated building panels is disclosed herein. In the space between two adjacent prefabricated building panels, an inner line of caulk is formed from the top to the bottom of the panels. Next, a porous drain strip is positioned adjacent to a first side of the inner line of caulk, also extending vertically from the top to the bottom of the panels. Lastly, an exterior line of caulk if formed adjacent to the porous drain strip extending vertically from the top of the panels to a point just above the bottom of the panels. The porous drain strip is extended through this space formed in the exterior line of caulk and allows the water collected to exit through the same space.