Under Construction, Part II is the third and final studio album released by hip hop duo Timbaland & Magoo. It was released by Blackground and Universal on November 18, 2003, in the United States. The group's third album and Timbaland's fourth overall LP, as he issued Tim's Bio: Life from da Bassment, a solo album, in 1998, Under Construction Part II is nominally a sequel to Missy Elliott's fourth studio album Under Construction, which was also chiefly produced by Timbaland. The album was dedicated to R&B singer and regular Timbaland collaborator Aaliyah, who had died on August 25, 2001.

Timbaland & Magoo were an American hip hop duo composed of producer/rapper Timothy "Timbaland" Mosley and rapper Melvin "Magoo" Barcliff, formed in 1990. The duo signed with Blackground Records, an imprint of Atlantic Records to release three studio albums: Welcome to Our World (1997), Indecent Proposal (2001), and Under Construction, Part II (2003). Following the latter's moderate reception, Timbaland then focused on his solo career and production work, while Magoo failed to release any solo material. Magoo died of a heart attack in 2023.