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How to Avoid Excessive Property Taxes

Knowing what to look for in monitoring your assessments can help avoid over taxation.

As robust occupancies and escalating investor demand in many markets drive up property tax bills for multifamily housing, apartment owners must continue to monitor their assessments to avoid overtaxation. Knowing what to look for can ease this task, and the place to start is with a firm grasp of the assessor's methodology.

Many taxpayers are unaware that assessors typically use a mass appraisal technique to derive assessments without referencing or even collecting details about a property's unique characteristics or performance. Property owners who understand the mass appraisal procedure have a distinct advantage in identifying assessment errors, and this knowledge can inform the apartment owner's arguments when they choose to fight excessive valuations.

Rooted in Generalities
The burden on appraisers to generate thousands of property values, often annually, is colossal. For this reason, assessors determine most market values for assessment purposes through mass appraisal, which is the process of valuing a group of properties as of a given date using common data, standardized methods, and statistical testing. Assessors using mass appraisal rely upon valuation equations, tables, and schedules developed through mathematical analysis of market data.

Mass appraisal analysis begins with assigning properties to classes or strata based on highest and best use. Valuation models are created for defined property groups, such as industrial or office, and are then calibrated to reflect the market factors for that specific market or submarket.

The International Association of Assessing Officers (IAAO) sets mass appraisal standards for assessors, by which an assessor can appraise the fee simple interest in property at market value. These standards set the preferred methods for mass application of the three traditional approaches to value (cost, sales comparison, and income). Armed with this information, apartment owners can attack mass appraisal procedures that result in values that don't reflect a property's true market value.

Property Data Errors
IAAO standards dictate that valuation models should be consistently applied to property data that are correct, complete, and up-to-date. However, assessor records commonly contain errors relating to a property's age, total square footage, net leasable area, number of apartments, unit mix, and facility amenities. An error in one of these fundamental property characteristics can significantly increase a property's overall assessment.

When arguing errors in specific property data, apartment owners should be prepared to share a current rent roll with their assessor in order to document the property's square footage, net leasable area, number of units, and unit mix. It may also be helpful to provide the assessor with copies of the property's most recent marketing materials, which show the project's various floor plans and amenities. Finally, pointing out land-size discrepancies or external nuisances such as traffic or airport noise can be helpful in arguing for lower values.

Income Approach
Assessors typically use the income approach in valuing apartments. Mass appraisal application of the income approach begins with collecting and processing income and expense data gathered from the marketplace. Appraisers then compute normal or typical gross incomes, vacancy rates, and expense ratios to arrive at a net income that is capitalized using a market-driven cap rate. This approach is often problematic because it fails to take into account a property's unique economic performance in a dynamic market.

Perhaps the best defense against excessive appraisals is to attack an assessor's mass appraisal income pro forma. Apartment owners should distinguish their property's rental rates and expense ratios from market data by providing current and prior-year operating statements if the numbers support a value reduction. Assessors often overestimate rent and underestimate expenses.

Owners should also provide occupancy reports to portray the property's occupancy trends, compare the property's occupancy level with market comparables, and outline any concessions and allowances the owner provides renters to maintain occupancy. The standardized vacancy and collection loss factor used in a mass appraisal income approach rarely captures the true physical and economic occupancy of a project.

Finally, owners should refute cap rates derived from sales of properties that aren't comparable to the subject.

Mass appraisal is a necessary evil that apartment owners should guard against. Knowing how assessors apply the procedure will help taxpayers in their continued fight to reduce property taxes.


Gilbert Davila is a partner in the law firm of Popp Hutcheson PLLC , the Texas member of American Property Tax Counsel, the national affiliation of property tax attorneys. He can be reached at This email address is being protected from spambots. You need JavaScript enabled to view it.
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