What is a powered shell?

A powered shell is a building constructed to a data-center specification — structure, envelope, floor loading, clear height, base mechanical and electrical infrastructure — with secured power delivered to it and connectivity pathways in place, and without the tenant-specific IT fit-out.

The load-bearing word is *secured*. A shell next to capacity is a building with a good story. What separates a powered shell from a merely completed one is the same thing that separates powered land from land: a documented position rather than a plausible one. The surrounding vocabulary — cold shell, warm shell, powered shell, turnkey — describes a ladder of completeness that is drawn inconsistently between markets and landlords, and it is set out in full in [powered land vs powered shell](/sites/powered-land-vs-powered-shell).

What the term does *not* describe is a stage on the way to something else. A powered shell is a finished product with its own buyers and its own risk profile, and the developer who builds one has generally decided to stop before the fit-out on purpose. Fit-out is the most expensive and most tenant-specific part of a data center, AI requirements have been moving quickly, and committing to a configuration before a tenant exists is the costliest available mistake.

So the shell is the largest piece of the facility that can be built without knowing who will use it — which is precisely why the model has gained ground.

A tenant taking a powered shell is not buying a discounted turnkey facility. It is buying a specific bundle, and being explicit about the contents is what makes the deal price correctly.

Schedule. The building exists or is being built on a known programme, and the power position behind it is already established. The tenant skips land assembly, [entitlement](entitlement), and the [interconnection queue](interconnection-queue) — collectively the longest and least controllable part of the timeline. This is usually the largest single component of the value.

A power position it did not originate. The shell's power was secured by someone else, at someone else's risk, on a clock that started years earlier. What the tenant must verify is that the position is real and that it lasts: capacity, firmness, the documents behind it, and the [energization](energization) dates for each block.

Design control where it matters. Cooling approach, rack density, redundancy configuration and equipment selection remain the tenant's, which for an operator with a specific workload is not a concession but the point. With it comes the fit-out scope, the capital behind it, and a clean line between what the tenant controls and what it does not.

And what it is not buying, which is equally worth stating: the fit-out capital, which it now funds; the residual value of that fit-out, which depends on lease terms it has not yet negotiated; and certainty about what the shell can support, which is a function of how the building was specified before it knew about this tenant.

Every powered-shell transaction contains a line dividing landlord scope from tenant scope. It is usually treated as a technical schedule. It is in fact the most consequential commercial term in the deal, because it decides which capital pool funds which half of the building.

Landlord scope — structure, envelope, base building systems, the power delivered to a defined point — is real-estate risk. It is long-lived, generic, and attractive to real-estate and infrastructure capital, which will lend against it because there is a durable asset to take security over.

Tenant scope — everything past the demarcation point, typically the electrical distribution beyond it, the cooling plant serving the tenant's configuration, containment, racks and the compute itself — is equipment risk. It is shorter-lived, more specific, and funded by equipment finance, leasing and vendor paper.

Three questions decide where the line falls in practice, and they are worth settling before anything else in the lease:

• What physically terminates where. The point at which power is handed over, at what voltage, through whose switchgear, and who owns the equipment on either side of it.
• Who funds and who owns the improvements. Landlord-funded fit-out amortised through rent is real-estate capital wearing an equipment risk; tenant-funded fit-out is equipment capital sitting inside someone else's building. These price differently and they fail differently.
• What happens at the end of the term. Whether the fit-out reverts to the landlord, is removed, or is left in place and re-let. This single provision decides whether the tenant's fit-out has a residual at all, and it is routinely settled last.

The general point is the one running through [the data-center capital stack](the-data-center-capital-stack): the layers of a data center are funded by different capital with different horizons, and a demarcation line is where two of those layers are physically joined. Drawing it carelessly puts equipment risk into a real-estate structure, or the reverse, and the mispricing is not discovered until someone tries to refinance.

A powered shell is closer to conventional real-estate underwriting than powered land is, and the tests applied to it are correspondingly familiar — with one that is not.

The power documents. The same question as at every other stage: which document exists, what it is conditioned on, and what capacity it actually commits. A shell whose power rests on a nonbinding letter carries the identical defect as land whose power rests on one.

The tenant, or the path to one. A pre-let shell with a creditworthy occupier is a cash-flowing asset. A speculative shell is a construction bet on a market, funded accordingly. Where the tenant is a specialist compute operator rather than a diversified corporate, the credit question is a different one — see [neocloud](neocloud).

Lease term against the power position. A lease that outlasts the contracted power behind it is an unhedged exposure sitting inside a real-estate asset. The seam has to be at least as long as the obligation above it.

And the test that is specific to this asset: how generic is the shell. A building specified to a power density, floor loading and cooling approach that a wide set of operators can use is re-lettable, and its value survives losing a tenant. One specified tightly around a single operator's configuration is a building with one plausible occupier — which means the landlord holds that operator's credit for the full life of the asset whether or not the lease says so. Specification generosity is what a shell's residual value is made of, and a shell that cannot be re-let is the real-estate layer's version of a [stranded asset](stranded-asset).