Commercial property taxes are often the largest operating expense for business owners and investors. A successful appeal can save tens of thousands — or hundreds of thousands — of dollars per year. But commercial appeals require more sophisticated evidence than residential appeals.
Why Commercial Appeals Are Different
Commercial properties are valued using the income approach (for income-producing properties), the sales comparison approach, and the cost approach. The income approach is typically given the most weight, which means the appeal centers on income, expenses, vacancy, and capitalization rates — not just comparable sales.
The Income Approach in Commercial Appeals
The income approach converts a property's income stream into a value estimate: Net Operating Income ÷ Capitalization Rate = Market Value. To challenge the assessor's income approach, you must challenge one or more of the inputs: market rent, vacancy rate, operating expenses, or capitalization rate.
Challenging Market Rent
The assessor uses market rent — what a typical tenant would pay — not your actual rent. If your actual rents are below market (due to long-term leases signed at lower rates), you may be able to argue for a lower income estimate. Conversely, if your actual rents are above market, the assessor may use market rent to your benefit.
Challenging the Capitalization Rate
The cap rate is the most contested input in commercial appeals. A higher cap rate produces a lower value. To support a higher cap rate, present evidence of comparable sales with higher cap rates in your market. CoStar and LoopNet are good sources for this data.
Documenting Vacancy and Functional Obsolescence
If your property has above-average vacancy, document it with actual occupancy records. If your building has functional obsolescence (low clear heights, inadequate loading, outdated systems), document it with photos and contractor estimates for the cost to cure.
When to Hire a Commercial Appraiser
For commercial properties with assessed values over $500,000, hiring a licensed commercial appraiser (MAI designation) is almost always worth the cost. A MAI appraisal is the most credible evidence you can present and often results in settlements before the hearing.
The contingency fee model is common for commercial property tax appeals. Many commercial tax consultants charge 30–50% of the first year's savings. For large properties, this can still result in significant net savings.