Nat West House

103 Colmore Row is a 108-metre tall, 26-storey commercial office skyscraper located on Colmore Row, Birmingham, England. Completed in 2021, this building replaced the former NatWest Tower designed by John Madin and completed in 1975. In 2008, a plan by then owners British Land to demolish Natwest Tower and replace it with a taller modern equivalent was approved. This plan never progressed and in 2015 the building passed to the developer Sterling Property Ventures, who successfully applied to have the building demolished. Construction of the new tower began in June 2019 and completed in 2021.

103 Colmore Row is the tallest office building in the United Kingdom outside London to be constructed since the completion of Alpha Tower, also in Birmingham, in 1973.