How Louisiana Assessors Value Commercial Property: Where Assessments Can Go Wrong

Property taxes can be one of the largest ongoing costs of owning commercial real estate. Louisiana's property-tax appeal deadlines arrive quickly and vary by parish, so owners should understand how their property was valued well before the assessment rolls open. That starts with knowing why two seemingly similar buildings can receive dramatically different assessments.

Unlike residential property, which is often valued using nearby comparable sales, commercial property usually requires a more nuanced analysis. Office buildings, shopping centers, storage facilities, industrial sites, apartment complexes, hotels, and other income-producing properties are typically purchased as investments. As a result, their value depends on financial and market factors that are not always apparent from the property itself.

Louisiana law recognizes three generally accepted valuation approaches: (1) the market or sales-comparison approach, (2) the cost approach, and (3) the income approach. No single approach is automatically right for every commercial property. For many income-producing properties, however, the income and sales-comparison approaches are especially significant. Understanding how these methods work—and where their inputs can produce inaccurate results—can help an owner evaluate whether an assessment reflects fair market value and whether an appeal deserves a closer look.

Louisiana Law Requires "Fair Market Value" assessment.

Louisiana defines fair market value as the price a willing and informed buyer and seller would agree upon under ordinary circumstances. State law directs assessors to determine that value using the market, cost, and/or income approach.

The “and/or” is important. In Edmiston v. Louisiana Riverboat Gaming Partnership, 52,948 (La. App. 2 Cir. 9/9/19), 278 So. 3d 1113, affirmed on rehearing, 316 So. 3d 1239 (La. App. 2 Cir. 2020), a Louisiana appellate court held that the statute does not require all three approaches and approved use of the cost approach for a specialized casino and hotel where comparable sales were scarce and reliable financial data was unavailable. By contrast, in Williams v. Opportunity Homes Limited Partnership, 2017-0955 (La. 3/13/18), 240 So. 3d 161, the Louisiana Supreme Court held that the income approach was more appropriate for the affordable-rental property before it because the record showed that ordinary market comparables would not accurately capture its legal restrictions. These decisions are fact-specific, but together they reinforce a practical point: the valuation method must fit the property and the available evidence.

What Is the Income Approach?

For many income-producing commercial properties, the income approach is an important and sometimes primary driver of value. Rather than asking only what it would cost to replace a building or what another property sold for, the income approach asks:

What would a knowledgeable investor pay for the income this property is capable of producing?

That question reflects the reality of the commercial real estate market. Investors typically purchase income-producing property based on its expected return, not simply its physical characteristics. A fully leased office building with stable tenants is generally worth more than an identical building struggling to attract occupants. The first property offers a more reliable income stream and, with it, a higher valuation. 

To estimate value, the income approach considers the property's anticipated revenue, deducts the ordinary costs of operating the property, and converts the resulting net operating income into an estimate of market value through the application of a capitalization rate. While the methodology is well established, the ultimate conclusion depends on a series of assumptions about the property and the marketplace. Those assumptions often become the focus of valuation disputes.

Market Rents Are Only One Piece of the Puzzle

The analysis typically begins with rental income, but determining market rent is not always straightforward.

Existing leases provide valuable information, yet they may not accurately reflect current market conditions. A long-term lease negotiated several years ago may be significantly above or below today's market. Likewise, properties often generate income from sources beyond base rent, including common area maintenance reimbursements, parking fees, storage rentals, or other ancillary revenue.

The objective is not simply to total the property's current income. Instead, the valuation seeks to estimate the income that a typical buyer would reasonably expect the property to generate under prevailing market conditions.

Vacancy Matters

Even successful commercial properties experience tenant turnover. Office suites become vacant, retail tenants relocate, and industrial users occasionally downsize or consolidate operations. For that reason, income-based valuations typically account for expected vacancy and collection losses.

The appropriate vacancy rate, however, should reflect the realities of the local market. An assessment that assumes consistently high occupancy despite rising vacancies in the surrounding area may overstate the property's earning potential. Determining what constitutes a reasonable vacancy allowance often requires careful consideration of both the property's operating history and broader market trends.

Operating Expenses Can Significantly Affect Value

After estimating effective income, the analysis turns to the costs of operating the property. Management fees, maintenance, insurance, utilities, landscaping, repairs, and similar expenses all affect the property's net operating income. For Louisiana owners, recent pressure from rising insurance and other operating costs makes property-specific documentation especially important.

While these expenses may appear routine, relatively small differences in assumptions can substantially affect value. A property requiring heavier maintenance, reasonable reserves for replacement, or near-term capital work may be less valuable than a newer building with lower operating demands, even if their gross rental income is similar.

Because commercial properties vary widely in age, condition, and management needs, operating expenses deserve careful scrutiny rather than broad assumptions.

How Does the Capitalization Rate Affect Property Value?

Perhaps no component of the income approach receives more attention than the capitalization rate.

A capitalization rate represents the rate of return investors expect when purchasing a particular type of commercial property. It reflects market conditions, perceived investment risk, financing environments, and investor expectations.

Consider a property generating $1 million in annual net operating income. Applying a five percent capitalization rate results in an indicated value of approximately $20 million. Increasing that rate to six percent reduces the value to roughly $16.7 million. At seven percent, the estimated value falls to approximately $14.3 million.

Those differences illustrate why capitalization rates often receive close attention during the valuation process. A change of only one percentage point may alter the property's value by millions of dollars.

Can Physical Condition Support a Higher Capitalization Rate?

Condition problems and deferred maintenance may support a higher capitalization rate—and therefore a lower income-approach value. In our experience litigating Louisiana commercial-property tax appeals, documenting those issues for the assessor and the Louisiana Tax Commission can also support treating an office building, hotel, or other commercial property as Class B or Class C rather than Class A, when supported by the market data.

Although the calculation itself is relatively simple, the selection of the capitalization rate can have an extraordinary effect on value.

Assumptions Are Inherent in Valuation: Make Sure They Are Valid

In many cases, disagreements over an income-based valuation do not arise because the methodology itself is incorrect. Instead, the dispute centers on whether the assumptions accurately reflect the property being valued.

Questions may arise regarding market rents, vacancy assumptions, operating expenses, or the capitalization rate selected. Deferred maintenance, functional obsolescence, changing market conditions, or unique characteristics of the property may also affect value in ways that standardized models do not fully capture.

For that reason, a commercial owner evaluating an appeal should gather the materials that test each major assumption, including current leases and rent rolls; several years of income, expense, and occupancy data; insurance renewals; photographs and estimates documenting condition, deferred maintenance, or needed capital work; recent appraisals; and relevant market studies.

Build the Appeal Record Early

If an owner may appeal, timing affects the evidence as much as the filing. Under La. R.S. 47:1989(C)(2), Louisiana Tax Commission review is generally confined to evidence presented to the assessor before the deadline for filing a Board of Review complaint, subject to a limited procedure for certain additional evidence. Waiting until the Commission hearing to assemble leases, operating statements, or expert work can therefore jeopardize an otherwise sound valuation challenge. Exact filing and open-roll dates vary by parish, so check the current Louisiana Tax Commission information  and the local assessor's instructions early.

What is the Sales Comparison Approach?

The sales comparison approach estimates value by examining what buyers recently paid for similar commercial properties. At first glance, the concept seems straightforward. If comparable properties sold for a certain price, those transactions may help indicate the value of the property being assessed.

The challenge, of course, lies in determining whether the properties are truly comparable.

Commercial properties that appear similar from the street may differ substantially in the characteristics that influence value. A shopping center anchored by a national grocery chain is likely to command a different price than a center with multiple vacancies and short-term local tenants. Two office buildings of similar size may have very different market values if one has recently undergone extensive interior renovations while the other requires significant capital improvements. These differences require thoughtful analysis. 

Appraisers routinely adjust comparable sales to account for distinctions in condition, location, occupancy, lease structure, access, visibility, age, and other market factors. The reliability of the sales-comparison approach often depends less on the number of sales identified than on whether those adjustments reasonably reflect the differences between the properties. Unreasonable adjustments, or an unexplained failure to adjust, may support an appeal.

Timing also matters. Commercial real estate markets evolve continuously in response to changes in interest rates, financing conditions, new development, and local economic activity. A transaction that accurately reflected market value several years ago may provide less reliable guidance if market conditions have changed significantly since the sale occurred.

Finally, not every transaction reflects fair market value. Sales involving related parties, bankruptcy proceedings, foreclosures, estate transfers, or portfolio acquisitions may occur under circumstances that differ from an arm's-length transaction between a willing buyer and a willing seller. Those distinctions should be considered before relying on a sale as evidence of market value.

Why the Right Approach Matters

Depending on the property and the available data, an appraiser may rely on one approach or use several and reconcile the results to reach a final opinion of market value. Louisiana law does not require all three methods in every case.

For many income-producing properties, the income approach receives substantial weight because it reflects how investors evaluate expected returns. The sales-comparison approach can provide an important market check when genuinely comparable transactions exist. When reliable evidence under both approaches supports a similar conclusion, confidence in the valuation increases.

A Careful Review and an Early Start Can Make a Difference

Commercial property valuation is both an analytical process and an exercise in professional judgment. While accepted appraisal methodologies provide a framework for estimating value, the result ultimately depends on the quality of the data and the reasonableness of the assumptions used.

Property owners who understand the inputs driving their assessment—and who preserve property-specific evidence early—are better positioned to identify assumptions that do not match the property or the marketplace. Counsel can help frame the valuation issue, build the record, and navigate the short, technical deadlines at the parish level and before the Louisiana Tax Commission.

Because Louisiana's filing windows are short and vary by parish, the best time to evaluate an assessment is before the rolls open. The Stow Firm represents commercial property owners in assessment appeals before parish authorities and the Louisiana Tax Commission. To discuss whether an assessment warrants an appeal, contact the firm before the applicable filing window opens.

Learn more about the Stow Firm's Louisiana commercial property tax appeal services.

This article is for general informational purposes and is not legal advice. Deadlines and procedures may vary by parish and tax year.