Acoustic guitar sets the repeating harmonic frame, with recorder-like lines and added guitar voices widening the opening without changing its basic job. The song begins as a measured instrumental premise before the lyric enters.

The first vocal section places the lady, the stairway, and the first return of Ooh, and she’s buying a stairway to Heaven. Repetition matters here: the form narrows around a sung image while the accompaniment stays restrained.

The makes me wonder refrain separates the first strophic frame from a broader middle. Electric guitar and fuller support enter, and the lyric perspective shifts from story toward omen, westward pull, and collective calling.

The “bustle in your hedgerow” verse brings the rhythm section forward and gives the song a more explicit forward drive. The earlier reflective frame remains, but the form now moves in a firmer pocket, carrying the repeated wonder refrain into a higher-pressure setting.

The extended guitar solo takes over the vocal space and turns the build into an instrumental passage. Rather than resolve the climb, it holds the return back until the band has fully converted the song into its rock arrangement.

Plant re-enters for the climactic closing verse: And as we wind on down the road. The band carries the final ascent, then withdraws sharply near the end, leaving the plaintive a cappella close: And she’s buying a stairway to Heaven. The form resolves by emptying out rather than by sustaining its peak.