One Eastside is a residential skyscraper under construction in Birmingham, England. It is planned to be 155 metres (509 ft) tall, and 51 storeys. Upon completion, it will become the joint-tallest building in Birmingham and the West Midlands, alongside Octagon. One Eastside and Octagon will be Birmingham's first buildings to be taller than 150 m (490 ft), and are defined as skyscrapers by the Council on Tall Buildings and Urban Habitat.

The scheme also includes a second 16-storey building. It is being developed by local developer Court Collaboration. The scheme is located near the upcoming HS2 terminus station. It is expected to cost £160 million.

In 2019 planning permission was originally approved. In 2021 planning permission was granted again by the Birmingham City Council.

Construction of the tower began in 2023. The building topped out on 10 July 2025 and is expected to complete in 2026.