Typical of later prehistory, the site's inhabitants lived in round houses. Built of wattle and daub, these would have had reed thatch roofs, though (as shown) their roof lines may have had a variety of forms.

The round houses at Bradley Fen and King's Dyke West showed some variation in plan but on the whole consisted of 8.5-9.0m diameter circular foundations made up of post circles or post rings. The entrances were marked by substantial porch constructions that were invariably oriented towards the east. The entranceways measured around 1.75m across. All of the buildings included internal uprights, and these appear to have been both structural and a means of dividing up the inside space of the house.

The best example of a round house is Building 5 from King's Dyke. This was built with two rings of posts (one set in individual postholes, the other within a post-ring) with an opening towards the east, and probably sunrise. Internally the space was broken up by a series of pits and small posthole arrangements, including a small four-post setting in the southern part and a screen across the northern part. Also present on the site were a series of distinct four-square post settings. Such structures have been interpreted in a number of ways, including exposure burial platforms. However, the most likely explanation is that they were raised granaries, as still used in Africa, and until recently in continental Europe.

Four oval-shaped, under-floor storage pits arced around the south and west of the building and a hearth was located roughly centrally. Cut close to the southern edge of the internal space was a rectangular pit with vertical sides. This pit contained fourteen layers of 'rubbish' (ash, charcoal, burnt stones) some of which contained concentrations of disarticulated lamb bones belonging to animals aged between 2-6 months. This is an attribute shared by many of the roundhouses at Whittlesey where consistently the remains of slaughtered new born lambs are found either buried inside or close to the entranceways.