The mosque was opened in 1966; and it could hold up to 1,000 worshipers and has amenities like a library, a multipurpose hall, and a chamber for burial preparations.

[4]The construction of the Hassanal Bolkiah Mosque, situated on a 2.2357 acres (0.9048 ha) site, commenced on 17 April 1965 and was completed by mid-1966, at an estimated cost of B$700,000.

[2] On the morning of Friday, 9th Jamadilawal 1386 (26 August 1966), the mosque was officially inaugurated by the then-Crown Prince Hassanal Bolkiah.

During the opening ceremony, the Crown Prince expressed his appreciation to the committee responsible for organising the event and to Pengiran Anak Kemaluddin, the State Religious Affairs Officer, for inviting him to inaugurate the mosque, which was named in his honour.

[6] Later, on 7 October, the jubilee was marked with a Khatam Al-Quran assembly, attended by Badaruddin Othman and Abdul Mokti.