Masjid Mujahidin is the second mosque designed by the Housing and Development Board (HDB) under the Mosque Building Fund (MBF). Built at a cost of $900,000, the Mosque was officially opened on 9 October 1977 by then Acting Minister for Social Affairs, Dr Ahmad Mattar, to house a growing number of worshippers and provide adequate facilities to conduct religious classes Islamic learning programmes. Before the existence of the mosque, religious classes were conducted at the nearby Police Reserve Unit as the surau or prayer halls within the estate were not large enough.
The Mosque was the result of 11 years of hard work in planning and fundraising by the Muslim community in Queenstown who collaborated with Majlis Ugama Islam Singapura (MUIS). The Building and Construction Committee of the Mosque was first established in 1967 to organise fund-raising through the sale of calendars islandwide and food bazaars conducted in nearby housing estates. When it opened in 1977, specialised departments in education, youth, religion and welfare were established at the mosque.
