In the early 2000s, the school expanded its high school section, relocating the boys to Ngong Road in 2002, and then to a permanent new campus on Karen Plains Road — now the Boys Campus. The girls’ high school remained in Karen until 2013, when it moved to the newly constructed Farm Lane Campus, following the initial development of the site in 2010. Further expansion included the opening of a dedicated Early Learning Centre next to the Ngong Road campus in 2016, and the acquisition of a new property in Runda in 2023, earmarked for a new primary school. Today, St. Hannah’s stands as a multi-campus institution offering holistic education from early years to high school.