In the 18th century, Adam was considered Scotland's "Universal Architect". However, since the early 20th century, architectural critics have taken a more measured view, Colin McWilliam, for instance, finding the quality of his work "varied to an extreme degree". As well as being an architect, Adam was involved in several industrial ventures and improvement schemes, including coal mining, salt panning, stone quarries and mills. In 1731 he began to build up his own estate in Kinross-shire, which he named Blair Adam. He was the father of three architects; John, Robert and James, the last two were the developers of the "Adam style".