Choa Chu Kang MRT/LRT station

The LRT island platform with a side platform for alighting commuters seen on the right

On 31 October 2012, the Land Transport Authority (LTA) announced that Choa Chu Kang LRT station will have two more platforms, specifically for commuters to exit the trains to allow the existing platform in the centre to have more space to cater to boarding passengers. There will also be additional fare gates and a new covered linkway from the LRT station to Lot One. These new additions which also include widening the staircase between the MRT and the LRT stations were completed in 2016. New Exit E was opened at the same time, to Lot One Shoppers Mall but despite that, there is no lift access, only stairs.[9] The two newly constructed platforms at the LRT station began operations on 27 December that year. The two new side platforms, platforms 3 and 4, lack lift access so passengers who needs to take the lift when alighting at Choa Chu Kang LRT station have to wait for the doors to open to the island platform (platforms 1 and 2), where lift access is available. Stickers to remind passengers to exit at platforms 1 or 2 if they need a lift to exit are placed on all the LRT doors.[10]

In 2016, platforms 1 and 2 of the LRT had half-height platform barriers installed. Choa Chu Kang (and Bukit Panjang) was the first to install half-height platform barriers due to the high commuter traffic at this station. Half-height platform barriers were installed at platforms 3 and 4 during construction.[11] The half-height platform barriers are red in colour as compared to grey in colour on other parts of the line except Bukit Panjang Station. The red colour signifies the availability to transfer to the North-South Line which the line colour is red.

Beginning of the JRL station construction

On 9 May 2018, LTA announced that Choa Chu Kang station would become a terminus for the Jurong Region line (JRL). The station will be constructed as part of Phase 1, JRL (West), consisting of 10 stations between Choa Chu Kang, Boon Lay and Tawas, and is expected to be completed in 2027.[12]

The platforms will be situated on the former site of the Choa Chu Kang Bus Interchange as well as HDB multi-storey carpark at Block 303 Choa Chu Kang Avenue 4, located to the west of the current station complex. While the JRL platform will be of a typical Island platform design, an additional platform will be constructed to allow cross platform transfer between the Jurong Region line services and North South line southbound services.[13]

Contract J102 for the design and construction of Choa Chu Kang JRL station and associated viaducts, including Addition & Alteration works to the existing station complex, was awarded to Shanghai Tunnel Engineering Co. (Singapore) Pte Ltd at a sum of S$465.2 million. Construction will start in 2020, with completion in 2027.[14] Contract J102 also includes the design and construction of Choa Chu Kang West station and Tengah station, and associated viaducts.[15]

Demolition of an adjacent multi-storey car park started in December 2020 to make way for the expansion of the station.[16]

Initially expected to open in 2026, the restrictions on the construction due to the COVID-19 pandemic has led to delays in the JRL line completion, and the date was pushed to 2027.[17]

On 7 April 2008, a man was hit by a train at Choa Chu Kang station at 8 am, resulting in the disruption of northbound train services from Yew Tee to Bukit Gombak for about 50 minutes. He was subsequently pronounced dead by paramedics. A bus-bridging service was deployed between Yew Tee and Bukit Gombak stations as trains were made to turn around at Yew Tee, Bukit Gombak and Choa Chu Kang stations.[18]