Coultershaw is an important part of Petworth’s history. The Trust operates and maintains the Coultershaw Heritage Site located on the A 285 1 1/2 miles south of Petworth The former corn mill site is open to the public on the 1st and 3rd Sundays and Bank Holidays from April to September.
Coultershaw is on the routes of the Rother Navigation, the Petworth to Chichester Turnpike and the Pulborough to Petworth Railway.
In 1782 a waterwheel driven Beam Pump was installed alongside the mill to supply water to Petworth. In 2012 a 15kW Archimedes Screw water turbine was installed in the wheel pit of the old corn mill.New displays included an exhibition of George Garland photographs.