A Castellan powered shell is a tenant-ready AI campus — secured power, building, electrical topology, and cooling backbone — leased all-in on long-tenor triple-net terms. You install the IT and run the compute. It is our flagship, all-in offering: powered land and a fully built-out facility, delivered as one.
Castellan delivers the powered shell: the hard, slow, capital-intensive layer that sits between raw land and a running GPU cluster. Everything up to the point where your equipment plugs in is ours to build and operate.
The tenant brings IT, GPUs, and network kit. Castellan brings the rest — and the power behind it.
Castellan delivers the shell and operates the facility envelope; the tenant operates the compute and pays power, opex, and maintenance under a triple-net framework — the same capital logic that underwrites institutional real estate.
We structure for hyperscalers, sovereign clouds, AI labs, and regulated enterprise — counterparties that value secured power, predictable cost, and a neutral jurisdiction.
Typically 4–6 months from first conversation to a signed lease, then build to operational. Because power is pre-secured and our reference designs are standardised, a tenant can be live in roughly 18 months — a fraction of the industry norm.
Tell us your power, density, and timeline requirements. We'll walk you through first-site availability and the forward pipeline.