Also listed as STT Defu 1, STT Defu 2, STT Defu 3 and STT Singapore Defu campus.
STT Singapore 1 to 3 (Defu campus) is a data center project in Singapore, operated by ST Telemedia Global Data Centres. It is operational. It is planned for 40 MW of IT load. The operator reports 40 MW running.
Latest change on record: moved to operational on 17 August 2022. Record last checked against its sources on 19 October 2026.
This project is built or running, so every gate counts as passed.
Build odds is ArusGrid's reading of the public record, not a forecast, a rating or advice. It counts the gates this project has passed in public sources. Private progress does not show, a passed gate can be undone, and projects that pass every gate still stop. The method has not yet been tested against outcomes. How it works.
How Singapore approves, powers and taxes data centers is on Data center rules in Singapore.
Singapore holds 39 active projects with 874 MW of planned IT load between them, and STT Singapore 1 to 3 (Defu campus) ranks 11th by planned capacity. Of those, 27 are operational, 3 are operational and expanding, 3 are under construction, 1 is past financial close and 5 are announced only. Published colocation vacancy in Singapore was 4.9% as of December 2025, on 1,043 MW of operational colocation capacity as counted by Cushman & Wakefield. Vacancy excludes hyperscaler self-build.
STT GDC has 2 others in Singapore and 22 projects elsewhere in the dataset tracked by ArusGrid, including STT GDC Jurong Island (DC-CFA2) and STT Singapore 6 (Loyang). It sits on the STT Defu campus. Named funding comes from KKR and Singtel on the equity side. No user of the capacity is on the public record as of 2026-10-01, after a check of operator, landlord, contractor, regulator and lender documents. Most colocation leases are confidential, so this says nothing about occupancy.
The build is phased. Defu 1 at 13 MW is operational with a 2016 target; Defu 2 at 13 MW is operational with a 2018 target; Defu 3 at 15 MW is operational with a 2022 target. The dated record runs from under construction in April 2021 to operational on 17 August 2022.
Grid power for a large industrial user in Singapore costs about US$0.20 per kWh as of July 2026, the country figure ArusGrid applies where a site has no published rate. The US export control position for advanced AI chips in Singapore, as of 27 September 2026, is recorded as “No US destination-based licence requirement as enforced”. ArusGrid holds 9 public sources for this project, the latest dated 1 September 2026, and last checked the record on 19 October 2026.
Running capacity. The site is operational or expanding. The rules are fixed and published on the Methodology page.
no cooling/density/tenant signal published
This country carries no US destination-based licence requirement for advanced AI chips as the rules are enforced today. Access is a commercial matter between the project and its vendors. Criteria are published on the Methodology page.
No US destination-based licence requirement as enforced · No US destination-based licence requirement as enforced (2026-09-27) source
Checked on 2026-10-01. No user of this capacity is on the public record. ArusGrid read the operator's releases, the landlord's and contractors' exchange filings, regulator and lender documents and interconnection records. Most colocation leases are confidential, so this says nothing about occupancy.
Platform capital spans several sites. It is never added to this project's own figure.
The published band for Singapore is too wide to say anything useful about this building (range wider than half its midpoint, withheld), so no estimate is shown. The band itself is on the Colo prices page.
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