Scott was appointed architect to Westminster Abbey in 1849, and in 1853 he built a Gothic terraced block adjoining the abbey in Broad Sanctuary. In 1858 he designed ChristChurch Cathedral, Christchurch, New Zealand which now lies partly ruined following the earthquake in 2011 and subsequent attempts by the Anglican Church authorities to demolish it. Demolition was blocked after appeals by the people of Christchurch, and in September 2017 the Christchurch Diocesan Synod announced that the cathedral would be reinstated.