[2] Located about 26 kilometres (16 mi) from Tutong town, it is bordered by Kampong Luagan Timbaran and Kebia.

Kuala Birau also served as the main gateway for people living along the river to access the interior of Tutong District for rice farming and buffalo herding.

Early settlers included Jumat bin Kadir, Yakub, Bungsu, and Ludin, who hailed from Kampong Panchor.

The ketua kampung (village head) at that time was Pengiran Osman, originally from Sarawak, who lived in a place known as Suak Ajung.

Sambiling was a swampy area near Bukit Mahligai (the site of the current Kampong Birau Mosque) that was developed by Orang Kaya Temenggong Umo, a Dusun leader with connections to the Dusun people of Laman Kebia (Kampong Kebia) and Batang Mitus.

[4] The migration of the Tutong people to the new settlement accelerated after the construction of the Kuala Abang road in the late 1930s, connecting Brunei Town to Kampong Lamunin.

The school building measured approximately 36 by 18 feet (11.0 m × 5.5 m), had no floor, and was made with bulian wood pillars, kajang walls, and a thatched nipah roof.

The students came from the Tutong, Kedayan, and Dusun communities living in Kebia, Birau, and Luagan Timbaran.

[7] In addition to educational development, the village residents also participated in Quranic studies and religious lessons, including the practice of prayer, taught by a teacher named Syiling bin Ahmad, known as Guru Keling, who was from Sarawak.