A flour mill operated on the site of the old herring station site between 1939 and 1948. Most of the mill workers were ferried daily to the island, but some housing was constructed at this time. Wheat was carried to an island wharf by sailing ship and flour transported back to Ullapool, from where it was distributed to bakeries across the north of Scotland. Sacks were labelled "Isle Martin Flour Mills". After the mill closed, its buildings and wharves were dismantled in 1948.