The first school was an old wooden building which was a vehicle repair shop opposite St. Margaret's Church.

The school was established by the efforts of founder Principal Rev L R Melling and the parishioners of St Margaret’s Church in Seria at Lorong Tiga to cater for those who wanted English as the medium of instruction.

It was officially opened by R E Hales, managing director of British Malayan Petroleum Company on 8 April 1956.

The ARCON building was inaugurated by the Managing Director of Brunei Shell Petroleum, PM Linton, on 7 May 1961.

A new classroom block was inaugurated by the Bishop of Borneo on 26 February 1967, and the principal's quarters were completed in October 1967.