Headland Archaeology (UK) Ltd conducted a trial-trench archaeological evaluation on land at Holwell Road, Pirton, Hertfordshire, prior to submission of planning consent for the residential development of the site. The trial-trenching evaluation uncovered a single area of medium local significance remains at the northern end of the site. The artefactual, ecofactual and contextual information are, when combined, suggestive of occupation activity within the PDA, in the form of an infilled ditch of uncertain function - though presumably located close to settlement activity. These are most likely to have been infilled during the mid-late Iron Age. These were picked up as a geophysical survey anomaly and targeted by trenching (Trench 1). Medieval - post medieval agricultural remains were also picked up on the site, consisting of plough furrows and field boundaries.