In April 2017 Oxford Archaeology was commissioned by Croudace Homes to undertake an archaeological evaluation of land adjacent to Thame Road in Longwick, Buckinghamshire. The site, centred on NGR SP 7875 0525 and lying at 85m above Ordnance Datum, has been proposed for a new housing development. The evaluation involved the excavation of sixteen 25m by 1.8m trenches and it took place over three days from the 3rd to the 6th April 2017. The results of the evaluation confirmed the presence of archaeological features at the site, mainly comprising a modest number of linear features, laid out on an approximately NW-SE alignment. Some of the features, in the two most northerly of the three fields under investigation, were parallel with present-day field boundaries. Although most of these features remain undated, Roman pottery was recovered from one of them and medieval pottery was recovered from unstratified contexts.