An archaeological watching brief was carried out in August 2005 during the construction of an extension at the side of Priory Cottage, Lewes, due to its location near the possible boundary wall of the demolished Medieval Cluniac Priory of St Pancras. A number of Medieval features were located during the watching brief, including two walls, one still retaining a trace of a wooden sill beam, rubbish pits and the base of an oven or kiln. A large assemblage of Medieval pottery, building materials and animal bone was recovered. The evidence suggests that one or more buildings, probably of a domestic nature, were located within the Priory precinct during the 13th and 14th centuries.