After being enlarged, Coldstream Mill was used for preparing animal feed or meal, grinding linseed cake, beans, maize and barley. The mill had three sets of stones, two working whilst one was being dressed (serviced and sharpened). The mill never had an electricity supply and never needed any auxiliary power thanks to the mill pond. The mill was the last traditional working water mill in Ayrshire and one of the last in Scotland. Some of the items for the mill are on display at the nearby Dalgarven Mill museum near Kilwinning. The mill was converted to a private house and the waterwheel and mill pond have been preserved as part of this development.