The farm has an ancient moat. This dates back to between 1250 and 1350AD. Discovery of roof tiles and charred layers suggest the presence at some time of a timber building.  Today the moat forms part of a water system that is between a feeder pond and the lake which flows into the River Arun.

The Moat at Brownings is a Grade II Listed Scheduled Monument.  It is a very rare site for West Sussex

https://historicengland.org.uk/listing/the-list/list-entry/1406949