Between April and November 2015 Wessex Archaeology, commissioned by Linden Homes South and Bloor Homes Southern, undertook archaeological mitigation on land at Crowdhill Green, Fair Oak, Eastleigh, Hampshire, centred on National Grid Reference 448830 119560. The works, a condition of planning permission being granted by Eastleigh Borough Council (Planning Reference O/13/73707 and R/14/75539) totalled 1.3 ha. Comprising two large areas (Areas 1 and 2), and seven smaller areas (Areas 3-9) approximately 20 x 20 m, they were subject to strip map and record excavation. A watching brief was also maintained during access road and swale groundworks. A subcircular feature of unknown function contained a Mesolithic tranchet axe (c. 8500-4000 BC) and fragments of charred hazelnut shells. Further Mesolithic flints were recovered from the subsoil, and residually from later features. A group of three Middle Bronze Age cremation graves containing urned burials, of which two were radiocarbon dated to 1620-1300 cal. BC. All three urns were inverted and damaged by ploughing, but well preserved. A small pit contained three sherds of possibly Middle Bronze Age pottery along with three pieces of struck flint and burnt flint. Further late prehistoric sherds were also found residually in other features. A long curving gully pre-dates a Romano-British ditch and may also be of later prehistoric date. Late Iron Age/early Romano-British pottery and Romano-British tile were recovered from a small number of features in Area 1, including two ditches possibly forming part of a small Romano-British enclosure with a group of intercutting pits.