Being a British colony, in 1941 a crisis arose. Kenya was affected by World War II. The army took over Msongari and the school relocated to Lumbwa (Kipkelion). Many parents did not want their young daughters to go so far away. So a 'temporary' school was opened in Valley Road. When the war ended the school had established it's own identity, it never closed and the pupils never rejoined Msongari. Loreto Convent Valley Road School offers education for girls starting with Pre-Primary, Primary and Seconadary Education. Founded by the Loreto sisters in 1941 it forms part of a large, worldwide family and inherits a rich tradition. The school began with 6 boarders and 40 day pupils. The first classrooms were built with wood and Makuti. In February 1943, the boarding section closed. In September the foundation stone of new classrooms was laid. In May 1946 there were 104 children Standard 1-5. and babies who were 53. Until 1970 boys were admitted up to Std.3.
It seems that what we now know as Valley Road grounds are made up of 4 different properties bought over the years. Annals are not clear on when exactly the Secondary Section began but there is a quote from January 1949 ' Big girls are slow to come in, I think because we are looked on as a kindergarten school still' By January 1950 there were 9 classes(220) with 5 Loreto Sisters and 3 lay teachers on the staff. Three girls sat for the Cambridge exams in 1955. With the opening of Bishops Road in 1951 and 3rd Ngong Avenue in 1953 access to the school improved.
A highlight of this time was the consecration of the Chapel to 'Our Lady Immaculate' on 11th April 1954. And in December 1955 the statue of Our Lady of the Immaculate Conception, which still welcomes all visitors who arrive at the school. May 27th 1967 saw the celebration of the Silver Jubilee of the opening of the school.