The $4 Million Error: How a Forensic Appraisal Review Exposed Systematic Overvaluation in Ohio Multifamily

Action Item: If you represent a property owner challenging a county appraisal in a BOR or BTA proceeding, this article shows how a forensic appraisal review can uncover errors that standard rebuttal appraisals miss, and how those errors translate directly to dollars in overpaid taxes.

The attorney called because the numbers didn't feel right.

His client owned two multifamily properties in Southwest Ohio, 264 units combined. The county appraisals came in high. The owner's appraiser had already prepared rebuttal reports. But the attorney wanted a second set of eyes, someone who could look at the opposing appraiser's work not as a competing opinion, but as a forensic exercise: is this appraisal methodologically sound, or is it broken?

It was broken. Badly.

What started as a routine review of two appraisal reports turned into an eleven-finding forensic analysis documenting systematic errors that suppressed combined value by over $4 million. Not differences of professional judgment. Errors. The kind with paper trails.

The $0 Comparable

The most striking finding involved a single comparable sale that anchored the appraiser's value conclusions for both properties.

The appraiser used a property called Harbor View Apartments (not its real name) as a primary comparable in both appraisal reports. In the report for the Dayton property, Harbor View was listed at a sale price of $4.0 million. In the simultaneously prepared report for the Cincinnati property, the same property appeared at $4.5 million.

Same property. Same appraiser. Same lender engagement. Two different prices.

When we pulled the actual transaction records, the picture got worse. The recorded instrument was a $0 quit claim deed, an entity transfer between related parties recorded in June 2024. That is not a market transaction. It does not reflect arm's-length value. Under USPAP (Standards Rule 1-5), an appraiser has an obligation to verify whether a transaction is arm's-length before using it as a comparable. A $0 quit claim deed fails that test on its face.

The last actual sale of Harbor View was $2.1 million in 1999, more than 25 years ago.

The appraiser used a non-arm's-length transfer recorded at $0 as a multimillion-dollar comparable, reported it at two different prices in simultaneous reports, and relied on it as primary market evidence for a 264-unit portfolio. That's not a judgment call. That's a methodology failure.

The 52-Mile Comparable

That same comparable sat 52 miles from the Dayton subject property. Standard practice for urban multifamily appraisals is to draw comparables from the same market area, typically within 10-15 miles for properties in established urban and suburban locations. The Appraisal Institute's guidance is clear: comparables should reflect the same competitive market dynamics as the subject.

A property 52 miles away is in a different city, a different county, a different rental market, and a different economic submarket. Using it as a primary comparable for urban multifamily is indefensible, and it becomes more indefensible when the transaction itself isn't real.

The Tax Error: $269,127 Per Year

This is the finding that translates most directly to dollars.

In both appraisal reports, the appraiser adopted property tax figures for the income approach that significantly exceeded the actual taxes verified against county auditor records.

For the Dayton property (168 units), the appraiser adopted annual property taxes of approximately $282,000. The county auditor's records showed actual taxes of approximately $87,000. That is an overstatement of 221%.

For the Cincinnati property (96 units), the appraiser adopted annual property taxes of approximately $141,000. The county auditor's records showed actual taxes of approximately $66,000. That is an overstatement of 113%.

Combined, the appraiser overstated property taxes by $269,127 per year across the two properties.

In an income approach valuation, property taxes are a direct deduction from net operating income. Overstated taxes mean understated NOI. Understated NOI, divided by a capitalization rate, means suppressed value. The math is straightforward and the impact is large.

How a Tax Error Becomes a $4 Million Value Suppression

Here's the arithmetic, using the appraiser's own capitalization rates.

At the cap rates applied in the two reports (ranging from 5.95% to 6.33%), the $269,127 annual tax overstatement translates to a value suppression of $4.26 million to $4.53 million.

Read that again. The property tax error alone, setting aside the fabricated comparable, the distance issue, and every other finding, suppressed the combined appraised value of these two properties by over four million dollars.

This matters in a BOR or BTA proceeding because the appraised value directly determines what the owner pays in taxes. Overstated appraisal means overstated assessed value means overstated tax bills. For 264 units across two properties, that isn't an academic exercise. That's real money every year.

The Lender Confirmed It

One detail that elevated this case from "appraiser made mistakes" to "appraiser was informed of mistakes and refused to correct them."

The lender, US Bank, conducted its own independent review of the appraisal reports. The bank identified the same errors we found, including the Harbor View comparable and the property tax overstatements. The bank communicated these concerns to the appraiser.

The appraiser declined to make corrections.

When a forensic reviewer and the client lender independently identify the same errors, and the appraiser still won't correct them, the conversation shifts from methodology to credibility. In a BOR or BTA hearing, that timeline matters.

What a Forensic Appraisal Review Actually Does

Most attorneys who challenge a county appraisal do so by hiring their own appraiser to prepare a competing value opinion. That's necessary, but it's not sufficient.

A competing appraisal says "we think the property is worth $X." A forensic review says "here's why their appraisal is wrong, and here are the specific standards violations that prove it."

In this engagement, the forensic review documented eleven specific findings, each tied to a USPAP violation or industry standard departure. Beyond the items described above, the review identified:

• Zero time adjustments applied to comparable sales up to 46 months old, despite a period where 10-Year Treasury yields moved more than 250 basis points. In a cap-rate-driven asset class, ignoring interest rate movement over a four-year period is a material omission.
• Inconsistent treatment of comparable data across the two simultaneously prepared reports, suggesting the reports were prepared independently rather than as a coordinated analysis of related assets for the same client.
• Failure to reconcile conflicting data points that would have been apparent to any reviewer reading both reports side by side.

Each finding was documented with the specific USPAP standard or advisory opinion it violated, the factual basis for the finding, and the quantified impact where calculable.

Why This Matters for Property Tax Appeals

Ohio's BOR and BTA proceedings are inherently battles of appraisal evidence. The board evaluates competing value opinions and decides which is more credible. Most of these hearings come down to which appraiser the board believes.

A forensic review changes the dynamic. Instead of asking the board to choose between two opinions, it gives the property owner's attorney a tool to affirmatively demonstrate that the opposing appraisal is unreliable. The argument shifts from "our number is better" to "their number is wrong, and here's the proof."

That's a stronger position, particularly when the proof includes verifiable public records (county auditor tax data), documented transaction records ($0 quit claim deed), and independent third-party confirmation (lender review).

When to Consider a Forensic Review

Not every property tax appeal needs a forensic appraisal review. Standard BOR hearings with routine valuation disputes are typically well-served by a strong rebuttal appraisal.

A forensic review adds value when:

• The opposing appraisal contains obvious red flags. Unusual comparables, unexplained adjustments, expense assumptions that don't match public records.
• The stakes justify the investment. Properties with high assessed values where the tax impact compounds annually. A $4 million value correction at a typical Ohio effective tax rate generates six-figure annual tax savings.
• Standard rebuttal has failed or is insufficient. The BOR sided with the county, and the case is heading to the BTA where evidentiary standards are higher.
• Credibility is central to the case. When the opposing appraiser has a track record of aggressive valuations, a forensic review can establish a pattern.

The Difference Between an Appraiser and a Forensic Reviewer

A rebuttal appraiser prepares their own value opinion using their own comparable sales, their own adjustments, and their own methodology. Their job is to answer the question: what is this property worth?

A forensic reviewer examines someone else's work to determine whether it was prepared in compliance with professional standards, whether the data is accurate, and whether the conclusions are supported by the evidence. Their job is to answer a different question: is this appraisal reliable?

Both are necessary in contested proceedings. But they answer different questions, and the attorney who has both is in a materially stronger position than the attorney who has only one.

My approach to forensic review is informed by 20+ years as a licensed architect, an MBA in Real Estate Finance, and active work as a real estate developer. I don't review appraisals as an academic exercise. I review them as someone who underwrites real estate for a living, who knows what market-rate operating expenses actually look like, and who can spot a non-arm's-length transaction because I've closed enough real ones to know the difference.

Jay DeVore is a licensed architect, MBA, and active real estate developer based in Columbus, Ohio. He provides forensic appraisal review, development feasibility analysis, and expert testimony for attorneys handling property tax appeals, eminent domain, and real estate litigation. Contact: jay@devore.consulting

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