August 18, 2026

A refinery is a purpose-built industrial system: process units, piping, tankage, utilities, and control systems assembled on a site to convert one commodity into others. Petrochemical plants share the same general characteristics.

These properties fall outside the methods used for most commercial real estate. Comparable sales are infrequent and difficult to interpret. The improvements have limited alternative use. A substantial portion of the facility’s value is attributable to equipment and business operations rather than to real property.

This article outlines how these facilities are typically valued and where the principal analytical difficulties arise.

Defining what is being valued

A refinery site contains several distinct categories of value:

  • Land
  • Real property improvements – buildings, foundations, site work, and, depending on jurisdiction, certain fixed installations
  • Personal property and equipment – process units, vessels, exchangers, compressors, and instrumentation
  • Intangible assets – permits, contracts, assembled workforce, and operating knowledge

The boundary between real property and personal property varies by jurisdiction. A given item of equipment may be classified differently in different states, which affects what is subject to real property taxation. In ad valorem matters, this classification is frequently the point in dispute.

Because of this scope, refinery valuation ordinarily involves more than one discipline. Real property appraisers, machinery and equipment appraisers, and engineers typically work to a scope definition agreed at the outset of the assignment.

The cost approach

For special-purpose industrial property, the cost approach generally receives the most weight, because sales and income data are limited.

The method estimates replacement or reproduction cost new and deducts depreciation from three sources.

Physical deterioration reflects age, condition, maintenance history, turnaround cycles, and the remaining useful life of major units. Process equipment deteriorates differently from building improvements, and maintenance capital expenditure is continuous.

Functional obsolescence reflects differences between the facility’s configuration and current efficient practice. Older units may consume more energy, require more labor, or produce a less valuable product slate than a modern equivalent. Excess construction cost, superadequacy, and inefficient layout are also treated here.

External or economic obsolescence reflects loss in value caused by factors outside the property.

Economic obsolescence

Economic obsolescence is the most difficult of the three to quantify and the most commonly contested. For refineries and petrochemical facilities, the relevant factors include:

  • Crack spreads and operating margins. The crack spread is the differential between the price of crude oil and the prices of the petroleum products refined from it, and represents the margin a refinery can expect.
  • Feedstock cost and access, including pipeline and logistics position
  • Product slate and demand for the specific products the facility produces
  • Regulatory requirements, including environmental compliance and associated capital expenditure
  • Industry capacity utilization and regional supply conditions
  • Remaining economic life

A cost approach that deducts physical deterioration but does not adequately account for economic obsolescence will overstate value. Quantifying economic obsolescence with market and operating data is a required element of a properly developed cost approach rather than an optional adjustment.

Income and sales comparison approaches

Income capitalization may be developed where facility-level operating data is available. It can serve as a check on the cost approach or as support for an economic obsolescence conclusion. The principal difficulty is volatility: refining margins move substantially, and a single year’s results may not indicate sustainable earning power. Where income methods are used, the analysis must distinguish returns attributable to real property from returns attributable to the business.

Sales comparison is rarely the primary approach. Refineries transact infrequently, and each transaction reflects a specific configuration, location, contract position, and buyer strategy. Transactions are also typically at the entity level, combining real property, equipment, inventory, contracts, and business value in a single price. Deriving a real property indication requires allocation, which is itself subject to disagreement.

Transactions remain useful as a check. A cost-based conclusion substantially above the prices at which comparable facilities transact indicates that obsolescence may be understated.

Highest and best use

Refinery improvements are close to single-purpose, which makes the highest and best use analysis consequential.

For a facility earning adequate returns, continued operation is ordinarily the conclusion and the analysis proceeds accordingly. For a marginal facility, the alternative is land value less demolition and remediation cost, which may be a small fraction of depreciated replacement cost and, in some circumstances, negative.

Between these positions are facilities whose value depends on assumptions about future margins, regulatory costs, and capital requirements. Appraisers applying reasonable but different assumptions can reach materially different conclusions.

Why these valuations are frequently disputed

Several characteristics contribute:

  • Assessed values are large, so small percentage differences represent significant amounts
  • The methodology involves judgment, particularly in quantifying economic obsolescence
  • The classification boundary between real and personal property is jurisdiction-specific
  • Both parties typically retain experts, and the analysis is examined in detail

Reports in this area are generally prepared with more extensive documentation than routine commercial assignments, since the reasoning behind each element will be examined.

Teel Valuation Group provides real property valuation for refineries, petrochemical facilities, and complex industrial properties for owners, taxing authorities, lenders, and counsel.

Connect with an expert or call 713-467-5858.