To the west of Lanercost Priory stands the remains of the inner arch of the priory gatehouse. Forming a link between the outside world and the canons inside, the surviving part of the outer gatehouse above would have faced into the precinct and the building would have extended to the edge of the road. Dating to the early 13th century, the gatehouse was constructed of squared calciferous sandstone and coursed rubble which was taken from the nearby Roman wall. The gatehouse remains feature a chamfered segmental arch of three orders, hood mould and moulded corbel stops with fragments of fan vaulting. The current gates reflect the Arts & Crafts interests of George Howard, ninth Earl of Carlisle, who erected them during his restorations. The surviving inner arch of the gatehouse is Grade I Listed.