Most of Halfpenny's buildings, including several that may have been designed by him or his contemporaries, are or were located in and around Bristol, where he was probably based from about 1730 (his "Perspective Made Easy", published in 1731, contains various views of the city). The Coopers' Hall, King Street, built from his designs in 1743–4, is the most notable and the only surviving building in the area which can positively be identified as his work. The coopers relinquished it in 1785, and it was later used as assembly rooms, warehouses and a Baptist chapel. Since 1972, the ground floor has formed the main entrance to the Bristol Old Vic theatre, and the upper floors house various theatre facilities.