"Fifth House" is a hard-charging original composition from Coltrane Jazz, recorded in November 1959 with the Wynton Kelly trio. The piece is a contrafact based on the chord changes of Cole Porter's "What Is This Thing Called Love," recast in the key of C with a 32-bar AABA structure at a blistering tempo around 221 BPM. Coltrane tears through three choruses on tenor saxophone with extraordinary technical command, weaving complex lines through the familiar harmonic framework with an intensity that presages his work on Giant Steps, recorded just months earlier. Kelly responds with two fluent choruses that balance bebop precision with blues feeling, supported by Chambers and Cobb's unwavering swing. The title reportedly refers to a house in Philadelphia where Coltrane and fellow musicians would gather to practice and exchange ideas. As a contrafact, the composition reveals Coltrane's deep engagement with the bebop tradition of reimagining standard chord progressions, even as he was simultaneously pushing beyond those boundaries. The performance crackles with competitive energy, as each soloist seems driven to match the other's inventiveness, resulting in one of the most kinetically exciting tracks on the album.