Map / ON
Verified 2026-08-01
55H High-Density Colocation Data Centre
55H / CORE Data Centres / 55 Hereford St, Brampton
Operating
20 MW
announced
0 MW
energized
None of it is drawing power yet.
- 2025-03-05 Announced
- 2026-H1 Developer target stated by the developer, not a filed date
- Power path
- Grid
- Generation tech
- high-density AI colocation, liquid cooling, up to 130kW/rack
- Utility
- Alectra Utilities
- Queue reference
- Not stated
- Target online
- 2026-H1
- Announced
- 2025-03-05
- Verification
- multiple
- Coordinate
- 43.6874, -79.7395 (site)
Getting power in Ontario
Open door dressed in new gatekeeping: government now picks winners before IESO's technical process even starts.
The full Ontario record, with the route to power, the binding constraint and every dated policy event.
Sources
- Ontario-based 55H Announces Data Center Capacity Expansion
- 55H announces data center expansion in Ontario, Canada
- GTA's 55H data centre to undergo major expansions
215,000 sq ft, Tier III, phased build-out: 2.5 MW available in 2025, a further 2.5 MW in summer 2025 and 15 MW in the first half of 2026, for 20 MW in total. Those tranches are the schedule stated in the March 2025 announcement; no later source confirms they have been energized, so no operating capacity is shown yet.
Other tracked projects in Ontario
- Milton Hyperscale Data Centre (proposed, near Halton Hills Generating Station) Logistics Land Investments (TPA Group) · 720 MW · Announced
- Steelport AI Data Centre Campus (former Stelco lands) Slate Asset Management (with Digital Research Alliance of Canada) · 400 MW · Announced
- BUZZ HPC Greater Toronto Area AI Gigafactory BUZZ High Performance Computing Inc. (subsidiary of HIVE Digital Technologies Ltd.) · 320 MW · Announced
- Validus Power Iroquois Falls Data Centre Validus Power Corp · 120 MW · Announced
- Ascent/Related Digital Cambridge Data Centre (17 Vondrau St, TOR1 campus) Ascent Corp / Related Digital / TowerBrook Capital Partners (JV) · 60 MW · Construction
- STACK Infrastructure Toronto Campus (TOR01, 3650 Danforth Ave) STACK Infrastructure · 56 MW · Operating
- Prologis Meadowvale Business Park Data Centre Prologis · 40 MW · Announced
- Compass Datacenters Toronto Campus (75-77 Fima Crescent, Etobicoke) Compass Datacenters · 30 MW · Operating
Last verified 2026-08-01. Corrections: sam@mccordinvestments.com