District 23 consist of Bukit Batok, Choa Chu Kang, Hillview

Bukit Batok

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Bukit Batok (Chinese: 武吉巴督, Tamil: புக்கிட் பாத்தோக்), often abbreviated as Bt Batok, is a planning area and matured residential town located along the eastern boundary of the West Region of Singapore. Bukit Batok statistically ranks in as the 25th largest, the 12th most populous and the 11th most densely populated planning area in the Republic.[3][5] It is bordered by six other planning areas – Choa Chu Kang to the North, northeast and northwest, Cashew to the northeast and east, Clementi to the south, Bukit Timah to the southeast, Jurong East to the southwest and Tengah to the west.[6][7]

Bukit Batok largely sits on Gombak norite, a geological formation that is found in high concentrations within the planning area itself, as well as in the western parts of neighbouring Cashew.[8][9][10] It was this presence of the igneous rock that made Bukit Batok a pivotal location for the quarrying industry in Singapore around the turn of the mid-20th century.[11]

Choa Chu Kang

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Choa Chu Kang, alternatively spelt as Chua Chu Kang and often abbreviated as CCK, is a planning area and residential town located at the north-westernmost point of the West Region of Singapore. The town shares borders with Sungei Kadut to the north, Tengah to the southwest, Bukit Batok to the southeast, Bukit Panjang to the east and the Western Water Catchment to the west. Choa Chu Kang New Town is separated into two portions by the Kranji Expressway.

Originally a kampung, the area has been rapidly developed under the ambition of the Housing and Development Board, to transform it into a modern township. The town comprises seven subzones, five of which are the most densely populated: Choa Chu Kang Central, Choa Chu Kang North, Yew Tee, Teck Whye, and Keat Hong.

Hillview

Hillview (Chinese山景) is a neighbourhood nestled within the western region of Singapore. The neighbourhood overlooks the nearby Bukit Timah Hill, hence its name.

Hillview is naturally endowed with lush greenery as it is encircled by the woodlands of Bukit Gombak to the north west, Bukit Batok Nature Park to the south and Bukit Timah Nature Reserve to the east. Nearby are several other nature parks, such as Hindhede Nature Park, Dairy Farm Nature Park, Chestnut Nature Park and the upcoming Rifle Range Nature Park.