 In 1822, Lord Stewart became the 3rd Marquess of Londonderry.By 1835, the home's transformation was complete.Some half a century later, in 1882–83, the 5th Marquess commissioned James Brooks to build, in red brick with terracotta facings, a handsome new stable yard, coach houses, and accommodation for the stable staff of Londonderry House, arranged around an internal courtyard (all of which were accessible via wide double doors opening on to Brick Street).