[2] It worked in conjunction with a tide mill close by.[4] By 1939 it had been converted to residential accommodation, with the tower tarred and a new cap constructed.[3] The conversion was to a design by Ernst L. Freud with the first resident being Flora Twort.[5] Langstone Mill is a four-storey tower mill which shows evidence of having been raised by a storey at some point.It had a hand winded domed cap and the four common sails were carried on a wooden windshaft.