How to Determine the Highest & Best Use of an Obsolete Industrial Site
When a factory or industrial building stops earning its keep, the real question is not "how do I re-lease this building?" It is "what is the highest and best use of this site?" For aging industrial property, the answer is frequently a use the current owner never considered — powered land for a data center, an Industrial Outdoor Storage (IOS) or Enclosed Industrial Outdoor Storage (EIOS) yard, or a clean redevelopment. This guide walks through the four-part highest-and-best-use analysis appraisers and developers actually use.
What "Highest & Best Use" Really Means
Highest and best use is the reasonably probable use of a property that is legally permissible, physically possible, financially feasible, and maximally productive. It is tested from the perspective of the land as if vacant and the property as improved — which is exactly why obsolete buildings so often screen out. If the structure adds less value than it costs to keep, the site's best use may require removing it.
Test 1: Legally Permissible
Start with what the law allows. Review zoning and overlay districts, deed restrictions, easements, and environmental status (including any brownfield designation). Heavy-industrial or flexible zoning opens the door to data center, logistics, and IOS/EIOS uses; restrictive zoning may cap value or require rezoning. Environmental conditions don't automatically kill a deal — many former manufacturing sites become brownfield conversions — but they must be disclosed and priced.
Test 2: Physically Possible
Next, what can the site physically support? Evaluate acreage and contiguity, topography and buildable area, flood risk, soil and structural condition, and access. A 40-acre flat parcel with rail and highway access supports very different uses than a landlocked 3-acre lot. This is also where you assess whether the existing building is an asset or an obstacle.
Test 3: Financially Feasible
Now compare economics. For each legally permissible, physically possible use, estimate what it costs to deliver (demolition, remediation, site work, utility upgrades) against what the market pays. The decisive input for industrial land is almost always power: how much capacity is available and what an upgrade would cost. See how much power a data center needs to gauge whether your site's electrical position points toward a data center outcome.
Test 4: Maximally Productive
Finally, of the feasible options, which produces the highest residual land value? This is the answer. For an obsolete industrial campus the winner is often not re-tenanting the building but repositioning the land — powered land, IOS, EIOS, or logistics — because the site plus infrastructure outvalues the structure.
Comparing the Likely Outcomes
| Potential Highest & Best Use | What It Needs |
|---|---|
| Data center / powered land | Large, reliable power near transmission or a substation; 10+ contiguous acres; fiber and water |
| Industrial Outdoor Storage (IOS) | Stabilized yard, good truck access, permissive zoning; power is secondary |
| Enclosed Industrial Outdoor Storage (EIOS) | IOS attributes plus some covered/enclosed structure for higher-value tenants |
| Logistics / distribution | Highway access, adequate acreage, clear-height building or buildable pad |
| Re-tenant existing building | Functional structure the market still wants — the exception, not the rule, for obsolete sites |
For a deeper read on how buyers score a parcel, see Data Center Site Selection.
Frequently Asked Questions
How do you determine the highest and best use of an obsolete industrial site?
Is the building or the land more valuable in an obsolete industrial property?
Does IOS or EIOS ever beat a data center as the highest and best use?
Not sure what your site's best use is?
Carson Jones can give you a straight read on whether your industrial site's highest and best use is a data center, IOS/EIOS, logistics, or redevelopment. Get a confidential site read or visit Passive Investments.
Educational information only — not legal, tax, engineering, or investment advice.
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