# NEXTDC S4 Sydney

NEXTDC S4 is a data centre project at 16 Johnston Crescent, Horsley Park. The approved development includes a 294 MW power-consumption scope and two 330 kV underground circuits to Sydney West. Multiplex reports construction in progress.

Canonical: https://eloragrid.ai/land-grid/data-centres/australia/new-south-wales/nextdc-s4
Status: Under construction
Operator: Unknown
Evidence reviewed: 2026-11-05

## About NEXTDC S4 Sydney

NEXTDC Limited is developing NEXTDC S4 Sydney at 16 Johnston Crescent, Horsley Park, NSW. Multiplex identifies the project as under construction and lists 2027 as its target completion year. The published timetable refers to construction completion.

## About NEXTDC S4 Sydney

The NSW development consent for SSD-63741210, issued on 24 December 2025, covers a data centre with 294 MW of approved power consumption, electrical substations and associated infrastructure. The consent also covers the supporting electrical infrastructure.

## How S4 is proposed to connect to the grid

The planning assessment describes a proposed connection to Sydney West Bulk Supply Point (BSP) using 2 underground 330 kV circuits. The planning documents describe an approximately 2.6 km cable route between the two sites.

## How S4 is proposed to connect to the grid

Sydney West is identified as a bulk supply point for Endeavour Energy. The assessment includes two additional switching bays at the existing substation. 

## Electrical work and project likelihood

Probability not assessed. Planning stage is not a calibrated probability.

## Sources

- [NSW development consent](https://www.nextdc.com/hubfs/S4%20-%20Lot%20305%20Conditions%20of%20Consent/1.%20Applications%20and%20Approvals/Signed%20-%20SSD%20Instrument%20of%20Consent.pdf) — 24 December 2025 · Schedule 1 · approval, address and 294 MW scope.
- [HV route supplementary assessment](https://majorprojects.planningportal.nsw.gov.au/prweb/PRRestService/mp/01/getContent?AttachRef=SSD-63741210%2120250903T041746.047+GMT) — Aurecon revision D · 20 August 2025 · sections 2.1, 5.1 and 5.5.
- [Multiplex project page](https://www.multiplex.global/projects/nextdc-s4-sydney/) — Undated participant page · construction status and target completion.
- [Official application contact details](https://majorprojects.planningportal.nsw.gov.au/prweb/PRRestService/mp/01/getContent?AttachRef=SSD-63741210%2120250903T043141.039+GMT) — 3 September 2025 · Applicant Details. Contacts may have changed.
- [Original source](https://app.eloragrid.ai/land-grid-assets/data/datacentres.json) — 2026-10-21
- [NSW Planning Portal open data: CFT-1037279 post-consent certificate, 16 Johnston Crescent, Horsley Park](https://www.planningportal.nsw.gov.au/opendata/dataset/online-pcc-data-api) — 2026-10-21
- [Original source](https://www.planningportal.nsw.gov.au/major-projects/projects/nextdc-s4-data-centre-horsley-park) — 
- [Infrastructure Report - External HV Works](https://majorprojects.planningportal.nsw.gov.au/prweb/PRRestService/mp/01/getContent?AttachRef=SSD-63741210%2120250903T041746.047+GMT) — 
- [Signed - SSD-MOD Assessment Report](https://majorprojects.planningportal.nsw.gov.au/prweb/PRRestService/mp/01/getContent?AttachRef=SSD-63741210-MOD-2%2120260923T023932.155+GMT) — 
- [Request for SEARs_20231022225252](https://majorprojects.planningportal.nsw.gov.au/prweb/PRRestService/mp/01/getContent?AttachRef=PDA-63433217%2120231022T225331.748+GMT) — 
- [NEXTDC S4 Data Centre Horsley Park — retained reference](https://www.planningportal.nsw.gov.au/major-projects/projects/nextdc-s4-data-centre-horsley-park) — 
- [NEXTDC S4 Data Centre Horsley Park — retained reference](https://www.planningportal.nsw.gov.au/major-projects/projects/nextdc-s4-horsley-park-mod-2-acoustic-barrier-amendments) — 
- [NEXTDC S4 Data Centre Horsley Park — retained reference](https://www.planningportal.nsw.gov.au/major-projects/projects/nextdc-s4-modification-1-design-modifications) — 
- [Data centre, 16 Johnston Crescent, Horsley Park — retained reference](https://www.planningportal.nsw.gov.au/opendata/dataset/online-pcc-data-api) — 
- [Original source](https://www.nextdc.com/data-centres/sydney-data-centres-colocation) — 
- [NEXTDC S4 — retained reference](https://www.nextdc.com/data-centres/sydney-data-centres-colocation) — 
- [Multiplex — NEXTDC S4 Sydney](https://www.multiplex.global/projects/nextdc-s4-sydney/) — Primary source reviewed 2026-11-05

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Nearby infrastructure does not establish an electrical connection, available capacity or an open tender.