Rising Rock Partners, LLC v. Commissioner, T.C. Memo. 2026-45, June 2, 2026

In a recent decision, the United States Tax Court addressed the limits of valuation methodologies regarding noncash charitable contributions for conservation easements. In Rising Rock Partners, LLC v. Commissioner (T.C. Memo. 2026-45), the court scrutinized the use of an income approach based on speculative industrial rezoning to justify multi-million dollar deductions. For tax professionals, this case serves as a stark reminder that when evaluating "highest and best use," the court will look past theoretical economic potential to the practicalities of legal permissibility and market reality.

Factual Background of the Dispute

The litigation involved two related matters: a challenge by Rising Rock Partners, LLC (RRP) regarding a Notice of Final Partnership Administrative Adjustment (FEMA), and a challenge by Edgar F. Yost, III and Deborah A. Yost regarding a Notice of Deficiency. The crux of the dispute centered on the 2017 tax year, during which RRP reported a noncash charitable contribution deduction of $12,765,000 for granting a perpetual conservation easement over approximately 226 acres in Meriwether County, Georgia. The Yosts similarly reported significant deductions related to an easement on adjacent land.

The taxpayers' valuations were predicated on the assertion that the "before" value of the property was significantly higher than its current use due to the potential for granite quarry mining. Specifically, the petitioners relied on expert testimony suggesting that the property’s highest and best use was a commercial granite quarry, utilizing discounted cashflow models to project substantial future income. The Internal Revenue Service (IRS) disallowed these deductions in full and asserted accuracy-related penalties under Internal Revenue Code (IRC) § 6662.

The Taxpayers' Position and Relief Sought

The petitioners sought redetermination of the amount of their charitable contribution deductions under IRC § 170. Their primary legal argument was that the fair market value (FMV) of the easement should be calculated based on a "highest and best use" of industrial mining. To support this, they presented experts who utilized an income approach to quantify the present value of projected mineral extraction. Furthermore, the petitioners sought relief from the accuracy-related penalties, arguing against the application of substantial valuation misstatement penalties.

Judicial Analysis of Valuation Methodology and Highest and Best Use

The court’s analysis began with the fundamental principle that "the taxpayer bears the burden of proving both entitlement to a charitable contribution deduction under section 170... and the fair market value of the donated conservation easement." See INDOPCO, Inc. v. Commissioner, 503 U.S. 79, 84 (1992).

In determining the value of a conservation easement, the court applied the "before and after" method, which calculates the difference between the FMV of the property before the restriction and its FMV after the restriction. See Ranch Springs, LLC v. Commissioner, 164 T.C. 93, 128 (2025). Central to this determination is the identification of the property's "highest and best use." The court reaffirmed that highest and best use must be a "reasonably probable use that is legally permissible, physically possible, financially feasible, and maximally productive." Ranch Springs, 164 T.C. at 136.

The court specifically addressed the petitioners' attempt to use an income approach based on quarrying. The judge rejected this, noting that "a property’s current use is presumed to be its highest and best use absent evidence to the contrary." While the court acknowledged that a proposed alternative use must be reasonably probable and not merely speculative, it held that "we exclude from consideration uses dependent upon uncertain future events or contingencies that are only theoretically possible." Olson v. United States, 292 U.S. 246, 257 (1934).

Application of Law to the Evidence

The court found the petitioners' reliance on mining potential to be legally and economically unsound. Regarding legal permissibility, the court noted that the property was zoned for agricultural and low-density residential use, which "did not permit quarry mining or other industrial uses." The judge observed a critical lack of effort by the taxpayers to change this status, stating, "The record does not support such a finding [of rezoning probability]. Between RRP and Ogletree Realty Trust, the property was owned for more than a year... yet neither party made any effort to obtain a text amendment, rezoning, or a special use permit."

The court also addressed the financial feasibility of the mining use. It found that "the critical flaw in those analyses is the unsupported assumption that the local market could absorb additional supply at that level." The evidence suggested that existing quarry operators had unused capacity and that transportation economics favored established competitors. Consequently, the court concluded, "quarry development would not have been considered financially feasible by a hypothetical willing buyer."

In place of the speculative income approach, the court turned to the market approach. The most persuasive evidence was an arm's-length sale of the Rising Rock property itself occurring just 13 months prior to the donation. The court found that "this sale constitutes the most probative evidence in the record of the property’s fair market value." By adopting a valuation of $3,900 per acre—consistent with recent comparable sales and the actual purchase price of the subject property—the court arrived at a much lower easement value than claimed.

Conclusion and Final Ruling on Penalties

The court's conclusion was definitive: "the conservation easement was $649,955," a fraction of the millions claimed by the petitioners.

Regarding the penalties, the court addressed the application of IRC § 6662. The discrepancy between the reported deduction and the court-determined value was staggering. The judge ruled, "The claimed value therefore exceeded 1,900% of the and correct value, constituting a gross valuation misstatement within the meaning of section 6662(h)."

Because the misstatement fell into the category of a gross valuation misstatement for charitable deduction property, the court noted that statutory protections are significantly limited. "That defense [reasonable cause and good faith] is unavailable for gross valuation misstatements attributable to charitable deduction property much as stipulated in section 6664(c)(3)." Therefore, the 40% penalty was upheld. This decision serves as a cautionary tale for tax practitioners regarding the extreme risks of defending valuations built upon speculative, non-permissible land uses.

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