S4 Sydney
Under construction
The site
- Operator
- NextDC
- Address
- 16 and 6 Johnston Crescent, Horsley Park
- Lot and DP
- Lot 305 DP1275011, Lot 306 DP1275011
- Site area
- 29.4 ha
- Approved
- 24 December 2025 (294 MW)
- Timing
- Under construction since March 2026 (Multiplex), completion mid-2027
- Note
- The consent is for 294 MW (the portal's summary says 250). Phase 2, on exhibition since October 2026, adds 180 MW per its notice (the portal's summary says 134.4) and is not approved. NextDC reports 365 MW for the site.
Planning
NEXTDC S4 Data Centre Horsley Park
Determination
- SEARs
- Prepare EIS
- Exhibition
- Collate Submissions
- Response to Submissions
- Assessment
- Recommendation
- Determination
Construction and operation of a data centre comprising of six data centre buildings with a maximum height of 38 m and an operational capacity of 250 MW, including substation, earthworks, car parking, landscaping and ancillary works.
7 submissions
NEXTDC S4 Data Centre Phase 2, Horsley Park
Exhibition
- SEARs
- Prepare EIS
- Exhibition
- Collate Submissions
- Response to Submissions
- Assessment
- Recommendation
- Determination
Construction and operation of a data centre facility with a maximum power consumption of 134.4 megawatts comprising of two data centre buildings, plant and equipment, diesel storage and associated site infrastructure.
57 documents
2 modifications
- NEXTDC S4 Horsley Park MOD 2 - Acoustic Barrier Amendments Determination
- NEXTDC S4 Modification 1 - Design Modifications Determination
What's nearby
Closest substations
| Sydney West | 330 kV | 1.8 km |
|---|---|---|
| Mamre | 330 kV | 3.7 km |
| South Erskine Park | 132 kV | 2.3 km |
| Erskine Park | 132 kV | 2.3 km |
| Eastern Creek | 132 kV | 2.3 km |
Closest lines
- 330 kV or higher line 1.7 km
- 132 kV line 150 m
Other data centres within 5 km
12 other data centres within 5 km. Sign up free to see which.
Straight-line distances from the site. Connection routes and capacity depend on the network operator.
Grid detail
The full map has the grid detail
Spare capacity, connection queues, planned upgrades, zoning and lots, for any site in NSW. No scores, just the facts to make your own call.
Checked 2 November 2026. Planning stage from the NSW Planning Portal, 2 November 2026. MW is announced campus capacity, not power drawn today.
See every site like this
Free for your email address. Every other NSW site, the whole planning list and the live map open up.