The preventive excavations of the last few years give a better idea of the first enclosed settlements on the Caen plain that appeared from the 6th century BC onwards. Settlements with quadrilateral or polygonal enclosures stand out because of their large surface areas and the rare internal features. The most typical are the enclosures of more than half a hectare, these being the sites of Cairon/Rosel “Rue de Rots”, Mondeville “Rue Nicéphore-Niépce”, Escoville “le Domaine du Parc” and Bretteville-l’Orgueilleuse “le Bas des Prés”. One of the most remarkable aspects is the absence of residential buildings however, granaries that required deeper foundations to support the loads left post-holes. Storage is also attested through silos and parallelepiped pits. The diversity of the rare archaeological artefacts and the quantity of combustion waste indicate that these were settlements. The quantity, diversity and spatial distribution of the artefacts are indirect clues that lead to a better characterisation of the occupation and as far as possible the residential areas. The notable surface area of the enclosures shows their socio-economic importance. In some cases, the structured agrarian domain that includes a network of paths and plots of land often poorly documented due to the restrictions of the excavation areas increases the site’s status.