Office is the property type where the assessment roll falls furthest behind the market. Vacancy moves fast, rents reset on renewal, and a half-empty floor can change a building's value in a quarter. The county's value is a once-a-year mass-appraisal estimate — a model, not a walkthrough. When the model lags the market, the owner carries the gap on every tax bill until someone challenges it. The question is not whether your office building feels too high. It is whether the public record shows it, in a way the law recognizes.
The office-specific signals worth checking
Some over-assessment signals are general. A few are particular to office, and they are the ones worth reading first.
- Your dollars-per-square-foot sit above your true peers. The cleanest signal is also the simplest: take the county's value, divide by building area, and compare that $/SF against comparable office buildings of similar class, age, and location. A Class B suburban building assessed at the same $/SF as a Class A tower nearby is a flag. The number does the talking.
- The roll never absorbed a vacancy or rent shift. Office value tracks occupancy and rent. If your building lost a major tenant, dropped a floor to sublease, or renewed leases below the prior rate, the income that supports value fell — but the assessment, set once a year on a model, often does not reflect it. The lag is the opening.
- You are taxed like full-service space when you are not. Mass appraisal tends to treat office as a category. A building with deferred maintenance, an awkward floor plate, limited parking, or a weak submarket gets averaged in with stronger stock. Averages overcharge the below-average building.
- Comparable buildings sold for less than your assessment. When nearby office actually traded, those arms-length sale prices are the market's own answer — and if your value sits at or above them, that is the strongest signal of all.
A wide range across comparable buildings is not proof on its own. Two office buildings can differ for real reasons — class, condition, location, lease structure. Before we say you have a case, we adjust comparables for size, age, and location and compare you to true peers. We do not name owners, and we do not guess.
Why the public record reveals it
You do not need an insider to check any of this. The county assessment roll is public, and so are the sale and assessment files the state itself uses. We read the county's own records — the same data the assessor relied on — and rebuild the comparison the way the statute frames it. Nothing is scraped; all of it is free public data. The output is plain: your building's value, what comparable buildings show, the adjustments, and the gap. The math is the argument. We are a new company and we will not dress that up — but the records are the records, and they say what they say.
The lever depends on your state
An office over-assessment is only actionable if a statute gives you a way to bring it down. Each of our states gives you a different one, and the right evidence differs with it.
Florida — the cost-of-sale lever
Under Fla. Stat. s.193.011(8), Just Value must be net of the usual and reasonable costs of a sale — customarily about 15%. So a correctly-assessed building should sit at roughly 85% of what comparable buildings actually sold for. Where your assessment meets or exceeds the gross price comparable office sold for, it cannot be net of cost, and the county Value Adjustment Board can reduce it. The state's own qualified arms-length sales are the evidence. One honest caveat: for large income-producing towers the income approach tends to dominate and the cost-of-sale deduction is more contested, so the sales-comparison lever is strongest on ordinary commercial office. See the Florida hub, or a county like Miami-Dade.
Texas — the median lever
Under Texas Tax Code §42.26, if your office building is appraised above the median appraised value of a reasonable number of comparable properties — adjusted for size, age, and location — the appraisal district must bring your value down to that median. The county's own appraisals are the comparables. More on the Texas hub.
Utah — the equalization lever
Under Utah Code §59-2-1004, you may appeal the equalization of your assessment. Because Utah is a non-disclosure state, sale prices are not public, so the assessor's own comparable assessed values are the evidence: when your assessment materially exceeds comparable assessed values, the Board of Equalization can equalize it down to match. More on the Utah hub.
What we do with it
Our model finds the case from the public record and drafts the comparison. A licensed or authorized agent in your state reviews it, files the appeal, and represents you at the hearing — the model proposes, a human files. You pay nothing up front; the fee is contingent on a win, and our founding-year rate is 10% of the first-year tax savings. If the records do not show a real case, we tell you, and you owe nothing.
Office is not the only property type where the roll lags the market. Warehouse and industrial have their own tells — see is my warehouse over-assessed? for how the same approach reads a different building. And for more on the FL mechanic and the rest of our writing, the blog has the long form.
Figures here are derived from public records and describe what the record shows and what the statute requires. They are not a promise of any particular result.