Union is a co-living development of two towers in the St John's area of Manchester, England. The first phase, a 112 m (367 ft) tall, 36-storey skyscraper, is the first rent-by-the-room co-living building in the United Kingdom, where potential renters are matched with housemates based on their responses to a questionnaire. It was designed by Denton Corker Marshall and as of 2025 is the joint 17th-tallest building in Greater Manchester with Affinity Living Riverview in Salford. The second phase, consisting of a 32-storey building, is due for completion in 2025.

The planning application for phase one was submitted to Manchester City Council in April 2020 for a 36-storey building comprising co-living units, as well as amenity, flexible commercial (Sui generis), and co-work spaces. Planning approval was obtained in November 2021.

The planning application for phase two was submitted to Manchester City Council in December 2019 for a 32-storey building comprising co-living units, amenity space, gym and flexible commercial space. Planning approval was obtained in July 2021.

Construction of phase one was completed by property developer Renaker in March 2024.

• St John's
• List of tallest buildings and structures in Greater Manchester

• Official website
• Union at Vita Group
• Union Co-Living at Denton Corker Marshall