Modular Storage Assemblies and Components Thereof

A pole cup for a hang rod may include a wall-mountable member, and a cradle extending from the wall-mountable member. The cradle may include a substantially u-shaped sidewall defining a cavity for securely receiving an end of the hang rod such that the hang rod is retained in a downward first direction, in a lateral second direction, and in a lateral third direction opposed to the second direction, when the hang rod is positioned within the cavity. A pair of ribs extend from a cavity-facing surface of the substantially u-shaped sidewall. A modular storage assembly may include a hang rod and a pole cup. A method of installing a modular storage assembly may include mounting to a wall at least one bracket configured to support a shelf, installing trim for the shelf, and mounting a pole cup to a wall via the wall-mountable member.