The expandable shelf of the invention is formed of several telescoping tubular assemblies that are supported in parallel to one another between a pair of end plates. The end plates are mounted to opposed walls. A center bracket is provided to supportably mount between the end plates for embodiments having long or flexible tubes. In another embodiment, one end plate is mounted to a wall and a second end plate is supported on a floor-mounted column. A further embodiment has a removable end plate that is mounted to a wall surface and then the balance of the expandable shelf device is mounted to the removable end plate and the opposite end plate mounted to a second wall surface. An additional embodiment includes a solid surface platform that is adjustable in length to mount onto the expandable shelf.