Masjid Al-Istiqamah is a mosque in Singapore which was completed in 1999. The building is located at the corner of Yio Chu Kang Road and Ang Mo Kio Ave 3, with the front entrance at Serangoon North Avenue 2, directly facing Blk 139 on the opposite side of the street. The three-storeyed mosque with a combination of designs from the Nusantara, Middle East and Mauritius can cater to a maximum of 3,300 worshippers at any one time. Its convertible concept enables the optimisation of space and multiple functionalities of the rooms.