The lease you signed is not automatically the value the county should assess
For a Florida commercial property owner, a rent roll can look like the most important evidence in an assessment review. It is concrete, property-specific, and easy to summarize. But a lease is not the same thing as market rent, and Florida's valuation guidance draws that distinction directly.
Under Florida Statutes section 193.011, the property appraiser must consider present cash value: generally, what a willing buyer would pay a willing seller in an arm's-length transaction. For an income-producing property, that question often leads to an income approach. But the relevant income is not necessarily the income produced by one unusually favorable or unfavorable lease.
This is a statewide valuation principle, not a promise that every county uses the same model or reaches the same conclusion. County property appraisers may use different data sources, property classifications, and local adjustments. The practical question is whether the assessment reflects the property's just value as of the applicable assessment date.
Contract rent and market rent are different measurements
The Florida Department of Revenue's Real Property Appraisal Guidelines distinguish market rent from contract rent. Market rent is the rent the property could command under current market conditions. Contract rent is the rent produced by the existing lease. The two may be equal, but they may also diverge in either direction.
That distinction matters because a tax assessment is intended to value the real property interest, not simply to capitalize the private economics of one lease. A long-term lease signed when rents were lower may produce below-market contract rent. A newer lease signed above surrounding market levels may produce above-market contract rent. Neither fact, standing alone, establishes the correct assessment.
This is one reason a rent roll is best treated as a starting point. Pair it with evidence such as:
- Recent leases or renewals for comparable space.
- Asking rents and executed rents in the same submarket.
- Tenant-improvement and free-rent concessions.
- Vacancy, collection loss, and absorption trends.
- Differences in location, size, quality, age, access, and finish.
The goal is not to replace the county's number with a preferred assumption. It is to show, with property-specific evidence, why the county's assumptions may not represent the market supported by comparable transactions.
How the income approach turns operations into value
The income approach converts the expected economic benefits of an income-producing property into a value indication. The Department of Revenue guidelines describe a basic direct-capitalization formula: stabilized net operating income divided by an appropriate overall capitalization rate.
In shorthand:
Value = stabilized net operating income ÷ capitalization rate
That formula is simple. The work is in the inputs.
1. Stabilized income
A single year's revenue may not represent stabilized performance. A building with temporary vacancy, an unusual lease-up period, a one-time reimbursement, or a recently changed tenant mix may require a normalized analysis. The relevant question is what a market participant would reasonably expect from the property, not merely what appeared in one accounting period.
2. Operating expenses
Expenses affect value because they reduce net operating income. A review should identify which expenses are ordinary and recurring, which are owner-specific, and which are capital items that should not be treated as routine operating costs. Property taxes, insurance, repairs, management, utilities, and reserves may all require careful classification depending on the property type and the valuation convention being used.
Do not assume that adding every expense line to the analysis automatically produces a better result. The evidence should explain why an expense is market-supported and recurring. It should also show whether the county used a different expense ratio or omitted a cost that a typical buyer would consider.
3. Capitalization rate
The capitalization rate reflects risk and expected return. A lower rate generally produces a higher value indication; a higher rate generally produces a lower one. But a rate cannot be selected solely because it creates a favorable result. It should be supported by sales, market surveys, investor data, or other evidence appropriate to the property and valuation date.
A rate from a different property type, submarket, or risk profile may not be comparable. For example, a stabilized, fully leased suburban industrial property may not support the same rate as an older office building with substantial rollover risk. The evidence must explain the adjustment.
What to request before deciding whether to appeal
Florida's Department of Revenue taxpayer guidance says an owner may discuss the assessment with the property appraiser, file a petition with the county Value Adjustment Board, or do both. An informal conference does not extend the petition deadline. Petition forms go to the local VAB clerk, not to the Department of Revenue.
Before choosing a path, assemble the county's property record and the information used to build the assessment if available. Then compare it with your own file:
- The assessment's land, building, and total values.
- Gross potential income, vacancy, and other income assumptions.
- Expense categories and expense ratios.
- The capitalization rate or other valuation factor.
- Physical characteristics, zoning, condition, and effective age.
- Leases, renewals, concessions, and comparable market data.
The county's property record card is not the same as the entire appraisal file, and availability varies by county. Florida's Value Adjustment Board page explains that petitions are filed with the VAB clerk in the county where the property is located. County instructions control the mechanics, including local forms, electronic filing options, evidence procedures, and hearing logistics.
If you are preparing for a hearing, Castellan's guide on what counts as evidence in a commercial property tax appeal provides a broader checklist. Florida owners should also review the current evidence-exchange requirements discussed in Florida's 2026 appeal process. Those procedural rules are separate from the valuation question itself.
A lease can support your case without controlling it
A below-market lease may help explain why actual collections are weak, but it does not automatically prove that the real property is worth less. Conversely, a strong lease may show dependable income, but it does not automatically prove that the county's value is correct. The analysis still needs market context.
The strongest review usually connects three layers of evidence:
- The property: physical facts, condition, use, location, and legal constraints.
- The market: comparable rents, vacancy, expenses, sales, and investor returns.
- The assessment: the county's assumptions and the points where they depart from supported market evidence.
That structure is more useful than arguing from the tax bill alone. As Castellan's market value versus assessed value guide explains, the number on a tax notice is not simply a sale price. Florida's just-value question, assessed-value limitations, exemptions, and taxable value are related but distinct concepts.
The practical takeaway for 2026
As of September 8, 2026, Florida's statewide framework still requires a just-value analysis, while the exact evidence and filing process remain county-specific. A commercial owner reviewing an assessment should not begin and end with the current lease. Start with the income approach the county appears to have used, identify whether it relied on contract rent or market rent, test the expense and capitalization assumptions, and preserve the supporting evidence before the local deadline.
No review guarantees a lower assessment. The result depends on the property, the valuation date, the county's record, the quality of the evidence, and the applicable procedure. This article is general information, not legal, appraisal, or tax advice.
If you want a second look at the valuation inputs behind a Florida commercial assessment, request Castellan's free analysis. We can help identify the questions worth testing before you decide what to do next.