In 2011 a Building Committee was formed to start a design competition for the West Wing Building. The College had grown significantly and needed more bedrooms on-site and better facilities for all. The West Wing building was to complete the second quad, and the funds were raised from the University and from significant philanthropic support from College membership as part of a 50th anniversary campaign.
In November 2012, a design from Níall McLaughlin Architects was chosen. Planning Permission was granted in July 2014, and building work started in January 2015. A groundbreaking ceremony took place in 2015 and the building was fully open in March 2017.
The College has now grown into a vibrant and hugely active community. Sir Mark Jones FRSE, Master of the College from 2011-2016, was instrumental in the building project and accompanying fundraising campaign.
St Cross now has its sixth Master at the helm. Carole Souter CBE, former Chief Executive of the National Heritage Memorial Fund and Heritage Lottery Fund, took up the Mastership in September 2016.