Changi Depot comprises a train yard, which can hold a capacity of 35 trains and has an area of 250,000 square metres. The depot is also used for train inspection for trains on the North South Line and East West Line. The depot was completed in late 1980s when the East West Line was completed. The depot is beside the NEWater Visitor Center and is near Expo MRT station.
On May 18, 2010, carriage number 1048 of a Kawasaki Heavy Industries C151 train, trainset 047/048 was deliberately vandalised in the depot. Elaborate graffiti was drawn on the lower half of the carriage.
A Swiss national, Oliver Fricker was charged with three charges of trespassing into the depot on the early hours of May 17 and vandalising the train by spraying paint and damaging public property by cutting a wired fence into property belonging to the Land Transport Authority. Another British national has also been named as being involved in the case. However, his whereabouts are unknown.
SMRT apologised for security lapse on June 8, 2010. It reviewed the security measures in all depots together with the authorities. All personnel of the security companies, employed by SMRT, have been instructed to step up vigilance. The number of security personnel and patrols at each depot has been increased.
SMRT was fined S$50,000 for this incident. 
On 7 March 2012, Minister for Transport, Mr Lui Tuck Yew, announced on Committee of Supply Debate 2012 in Parliament of Singapore that upgrading of existing NSL and EWL depots to be started and completed by 2014.
This will be a temporary solution because Changi Depot will be redeveloped into Changi Town Hub, capable of having a carpark, residential developments and a ground reception counter. It will be completed in 2019.
- ↑ http://www.straitstimes.com/BreakingNews/Singapore/Story/STIStory_535411.html May 18, 2010. Retrieved 2010-06-04.
- ↑ http://www.channelnewsasia.com/stories/singaporelocalnews/view/1061214/1/.html Jun 5, 2010. Retrieved 2010-06-05.
- ↑ SECURITY MEASURES AT SMRT DEPOTS
- ↑ http://www.channelnewsasia.com/stories/singaporelocalnews/view/1160140/1/.html Oct 18, 2011. Retrieved 2011-10-18.
- ↑ Script error