and Gothic Revival styles, was designed by Henry Goodridge, an architect from Bath. It was begun about 1840 with a boldly asymmetrical design, and was extended northwards in the 1860s and succeeding decades. The north tower incorporates the remains of a 17th-century brick windmill.

According to the National Heritage List, excavations of the keep and aisled building were first done in 1858 and indicated "a number of lesser buildings surrounding