Written by: Nathan Fineman, Managing Director, Property Tax
For data center owners and operators, property tax is a significant and persistent operating expense, yet assessed values are often accepted without questioning whether they truly reflect current market conditions. One of the most overlooked drivers of overassessment in the sector is economic obsolescence, which is the impact of external forces beyond the owner’s control on property value.
In a market shaped by rapid technological change, power constraints, and shifting demand, these forces play an outsized role in determining value and must be properly recognized to achieve fair, defensible assessments.
Economic Obsolescence vs. Functional Obsolescence in Data Centers
Economic obsolescence is often confused with functional obsolescence, but the distinction is critical.
Functional obsolescence stems from the property itself, such as design limitations, outdated systems, inefficient layouts, or features that reduce utility relative to current standards. For data centers, this may include insufficient floor loading capacity, outdated cooling systems, inefficient layouts, or design limitations that restrict rack density.
Economic obsolescence, by contrast, is driven by external market forces. The American Society of Appraisers defines economic obsolescence (also called external obsolescence) as a loss in value or usefulness of an asset caused by factors external to the property and outside the owner’s control, including economic, regulatory, environmental, and industry-wide conditions like power availability constraints, regional supply dynamics, and shifting tenant requirements.
A modern, well-designed data center can still experience meaningful economic obsolescence if it is located in a power-constrained market or competes with newer facilities that better align with current demand.
Economic obsolescence reflects how these external forces influence buyer and tenant behavior and, ultimately, market value.
Why Data Centers Are Particularly Exposed
While all asset types are affected by economic obsolescence, data centers are particularly exposed due to the pace of change in the sector.
Demand driven by cloud computing, artificial intelligence, and data-intensive workloads has accelerated development across many markets. At the same time, power constraints, evolving infrastructure requirements, and shifting tenant expectations continue to reshape competitive dynamics.
Even when demand remains strong, issues such as power limitations can impair a facility’s ability to lease space and expand. Rapidly evolving compute and data center infrastructure adds another layer of complexity and can drive the need for additional valuation adjustments.
Facilities that cannot adapt may remain operational but become less competitive, placing downward pressure on value.
Data center valuation is increasingly driven by market conditions and infrastructure availability, not just bricks, mortar, and equipment.
Common Drivers of Economic Obsolescence in Data Centers
Several external factors frequently contribute to economic obsolescence across data center portfolios, including:
- Power availability has become a defining constraint—transmission limitations or utility backlogs can reduce demand or delay expansion, directly affecting value
- Market supply dynamics, including overbuilding or underutilization, can depress achievable rents and asset values
- Capital market conditions influence valuation by increasing required returns and reducing buyer pricing
- Regulatory and environmental pressures can impact financing availability, investor appetite, and asset liquidity
- Technology-driven changes continue to reshape tenant expectations, requiring ongoing investment to remain competitive
These factors reflect external market behavior rather than deficiencies in the property itself.
Why Economic Obsolescence Is Often Missed in Assessments
Despite its importance, economic obsolescence is frequently underrepresented in property tax assessments.
Many jurisdictions rely heavily on the cost approach, and deducts physical depreciation, functional obsolescence, and economic obsolescence before adding land value. In practice, however, assessors often estimate replacement cost and physical depreciation accurately while understating or omitting market-driven obsolescence, as mass appraisal systems are not designed to capture property-specific external pressures.
When economic obsolescence is not captured accurately, the cost approach can diverge significantly from income-based and market indicators. This disconnect is not acceptable and indicates that the valuation analysis is incomplete.
The Financial Impact of Overlooking Economic Obsolescence
When economic obsolescence is not properly identified, cost and income-based assessments can diverge from market reality, resulting in inflated values that increase property tax expenses and reduce net operating income.
For income-producing assets, even modest assessment reductions can materially improve cash flow and long-term asset value. Over time, unaddressed overassessment can compound, particularly in jurisdictions with recurring increases.
Why This Matters Now for Data Center Owners
The data center market continues to evolve rapidly. As assessments come under greater scrutiny, economic obsolescence will play an increasingly important role in determining fair value. Owners who proactively identify and support these external influences are better positioned to control tax exposure and protect asset performance.
Bringing Market Reality into Property Tax Valuation
Economic obsolescence reflects a simple principle: property value is shaped not only by the asset itself, but by the market environment in which it operates.
When external forces are ignored, assessed values drift from reality. Recognizing and addressing economic obsolescence is essential to achieving fair, accurate, and defensible property tax outcomes for data center owners.
How Specialized Property Tax Advisors Help
Addressing economic obsolescence requires more than a standard cost analysis. It demands market insight, industry knowledge, and the ability to quantify and defend external influences using credible data.
Effective advisors align cost-based assessments with income expectations, market evidence, and investor behavior. This integrated approach helps ensure valuations reflect real-world performance and can be clearly supported by assessing authorities.
Partner with DMA’s Property Tax Advisors
DMA works with data center owners, operators, and tenants to identify and quantify economic obsolescence using market-driven methodologies grounded in industry experience. Our specialists align property tax valuations with operational realities and broader market conditions, helping clients manage assessments proactively and defend values with confidence.
Connect with our team of property tax experts to discuss how economic obsolescence may be impacting your data center property tax assessments.
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