mfimage 286 Castlemead 15/09/2018 600 × 400 mfimage 286 Castlemead Castlemead rises above the Cabot Circus shoppers’ car park. Currently the tallest high rise office building in Bristol, Castlemead is 80 metres high. It was designed by AJ Hines and was built between 1973 and 1981. The building has 18 storeys.