The exhibits are arranged into nine themes some of which accord with building function, namely Domestic Architecture; Public Architecture; Public Utilities; Industrial, Commercial, and Military Architecture; Religious Architecture; Lost Houses; Unfulfilled Conceptions; R.E. Bonsall : Examples from an Aberystwyth Practice; Photographs and Postcards. .

Vernacular and grand domestic architecture together with drawings of places of worship numerically dominate the departmental collection, whilst drawings of several other categories are rare, for example, military constructions. The exhibits selected and their categories are by no means proportionally representative in the entire collection.