New Mill is a post mill on a two-storey roundhouse.
It had four patent sails carried on a cast iron windshaft and was winded by a tailpole-mounted fantail.
When originally built, the fantail was roof-mounted, in a similar manner to that still to be seen at Hogg Hill, Icklesham.
Medhurst fitted a five-bladed fantail, which was replaced in 1907 by an eight-bladed fantail of 11 feet (3.35 m) diameter by Neve of Heathfield.
The mill originally drove two pairs of millstones, driven by a 9-foot-8-inch (2.95 m) diameter head wheel and 8-foot-4-inch (2.54 m) diameter tail wheel.
Later, another pair was added to the breast, driven by a spur gear arrangement, the spur wheel being 4 feet (1.22 m) diameter.
One pair of stones in the breast was removed in 1933.

The body of New Mill is 21 feet (6.40 m) long and 12 feet (3.66 m) wide.
The mill is 45 feet (13.72 m) high to the roof.
The roundhouse is 25 feet (7.62 m) diameter and the main post is 2 feet 6 inches (760 mm) square.
New Mill is a post mill on a two-storey roundhouse. It had four patent sails carried on a cast iron windshaft and was winded by a tailpole-mounted fantail. When originally built, the fantail was roof-mounted, in a similar manner to that still to be seen at Hogg Hill, Icklesham. Medhurst fitted a five-bladed fantail, which was replaced in 1907 by an eight-bladed fantail of 11 feet (3.35 m) diameter by Neve of Heathfield. The mill originally drove two pairs of millstones, driven by a 9-foot-8-inch (2.95 m) diameter head wheel and 8-foot-4-inch (2.54 m) diameter tail wheel. Later, another pair was added to the breast, driven by a spur gear arrangement, the spur wheel being 4 feet (1.22 m) diameter. One pair of stones in the breast was removed in 1933.
The body of New Mill is 21 feet (6.40 m) long and 12 feet (3.66 m) wide. The mill is 45 feet (13.72 m) high to the roof. The roundhouse is 25 feet (7.62 m) diameter and the main post is 2 feet 6 inches (760 mm) square.
New Mill, Cross in Hand