Helmont House is a high-rise hotel and office tower in Cardiff, Wales. Completed in 1984, the 58-metre-high (190 ft) building has 12 floors and is the tenth tallest building in Cardiff. The building was renovated in 2009 into a 200-room Premier Inn hotel. The building was previously occupied by British Gas and was one of the largest office buildings in Cardiff, and is yards away from Cardiff Queen Street railway station.