Type of late Iron Age house found in Cornwall in the southwest of England dating to the later 1st millennium bc and early 1st millennium ad. Such houses have a cellular plan with a central precinct off which there are two or more chambers. The outer wall is generally curvilinear and irregular in plan. Entry to the central precinct is gained through a single narrow doorway; from the precinct there is access to some but not all of the attached chambers, many of which are interconnecting and can only be entered via another internal room. Courtyard houses are found singly or in village clusters.