Turbine House at Pontsticill Water Treatment Works

Small building of coursed occasionally snecked rock-faced sandstone with ashlar dressings, its outer side forming part of the wall of the Compensation Basin. Welsh slate roof. Round-arched doorways with heavy doors, hinges and locks at each end of inner side and multipane metal-framed round-arched windows to sides and in the gable ends, the S masked by a later addition.

Interior painted white with a stained planked ceiling. Original hydro turbine by Gilkes of Kendal is retained, though this no longer in use having been replaced by a new version. Gantry for maintenance supported by heavy corbels and valves still in place.