Dean's Yard is built on the site of The Elms and the former monastery farmyard. Since the 18th century there have been three rows of trees and a central green here, but the high railings surrounding it were removed in 1967.
The yard now features a number of large trees, including London planes, a red horse chestnut, a tulip tree, maple and sycamore. Smaller trees include silver birches and a medlar. The surrounding buildings are in an attractive ‘collegiate' style. The site is used by Westminster School as an occasional football pitch.