Founded in 1972,[3] the school delivers the English National Curriculum and International Baccalaureate Diploma Program to 1,850 students between the ages of 3 and 18.

Both the school and the company, which was set up in April 1971, were founded by Alliott, who previously had been a British Government Headmaster in Singapore.

Alliott noted in a letter to parents and colleagues in 1989:"The development and growth of land and buildings into a fine school is achieved only when the sum of its parts is viewed constantly as infinite.

[...] My grateful thanks to all of you for your support and continued efforts to make Dover Court one of the finest schools of its kind in South East Asia".

[18] With the expatriate community in Singapore growing, Dover Court Preparatory School expanded in the 1980s to cope with the demand.

With a growing number of students on its waiting list, a three-storey building, which now houses the secondary school and Department of Supportive Education, was built.

A great benefit of the department extolled by Alliott is the inclusivity and integration of students with disabilities into main-school activities at Dover Court.

[22] This is a view shared by former Prime Minister of Singapore Lee Kuan Yew, whose first grandson attended the school.

[13] In the conversion of the barracks into Dover Court Preparatory School, rooms on the second and third levels, most of which had previously been soldiers' bedrooms, were converted into classrooms.

[13] A fountain from the barracks was removed to make way for a roundabout and a carpark was later built on a steep, grassy slope at the entrance to the school to allow for students to be dropped off by parents.

[13] In the early hours of January 24, 1978, a fire gutted the quarters of the office manageress adjoining the main building.

Since the school was established on a large plot of land, with the main building surrounded by undeveloped field, there was significant space to do so.

This decision was made in light of shortages of school places for expatriate children in the early 1980s, with the possibility left open for further expansion should there be the need.

[17][39] The campus underwent extensive refurbishment work following its change of ownership in 2014, with further refurbishment of the school's original infrastructure, and the development of new facilities - including the construction a running track, a grass football pitch, basketball and netball courts, a sensory garden, a radio and television recording studio, and several playgrounds.

[51] In September 2018, teacher Monica Dolan was announced as the winner of the Future Leaders Category at the British Chamber of Commerce's 19th Annual Business Awards.

[52] Dover Court International School was also awarded the UK Impact in Singapore prize by the Chamber the following year.

[2] A key event on the Dover Court calendar is its annual United Nations Day - a celebration of the school's rich cultural diversity among students and staff.

It was also described in an article in The Straits Times in 1982 by the then principal, James Watkins, of United Nations Day:"The school is like a mini United Nations, with pupils from every possible creed, a multitude of habits, cultures, customs and eating habits have come together -- and all in complete harmony.

[58] Another tradition is the annual Dover Court Christmas carols concert, featuring performances by the school choir and orchestra.

[18][60] The 1974 Dover Court Christmas concert also included the Band of the Gordon Highlanders, one year before the final withdrawal of the British military from Singapore in 1975.