Losh based her design on an early Christian basilica, with an aisle-less rectangular nave ending in a semicircular apse. She termed the style "early Saxon or modified Lombard". The apse has columns between spaces for 13 seats. The altar is a slab of Italian marble on brass eagles. The inside and outside surfaces are decorated with naturalistic stone carvings of fossils, plants and animals, many of them done by William Hindson, son of a local builder. Sara and her cousin William carved the font out of alabaster. The results were compared by Pevsner to the arts and crafts workmanship of decades later. There are no explicitly Christian symbols, not even a cross, but the profusion of decoration has been seen by some as a celebration of creation.