The garden at Benvarden has been enclosed since the mid C17, most probably evolved from a semi-fortified Bawn. It is shown on a 1788 map soon after the neighbouring rhomboid cobbled courtyard was built. Bought by the Montgomery family in 1797, it was transformed into a modern walled garden with the bawn wall faced with brick and the height raised to the present 16ft, with paths and beds laid out.