Implicit Highest-and-Best-Use Adoption and Deference to Tax Court Credibility Findings in Conservation-Easement Valuation

1. Introduction

This consolidated Eleventh Circuit appeal arises from a charitable deduction claimed for a donated conservation easement encumbering 500 acres within a larger 5,145-acre Georgia tract known as Dover Hall. Petitioners Nathaniel A. Carter (and spouse Stella C. Carter) and Ralph G. Evans—equal partners in Dover Hall Plantation, LLC—claimed pass-through charitable deductions based on an appraisal valuing the easement in the eight-figure range. After a prior appeal addressed whether the easement satisfied the “granted-in-perpetuity” requirement, the present appeal focused on valuation: what the easement was worth at the time of contribution.

The key issues on appeal were whether the Tax Court (i) improperly ignored market evidence of value (including a prior partial-interest sale and asserted developer offers), (ii) failed to determine the property’s “highest and best use” as part of the before-and-after valuation method, and (iii) erroneously relied on purportedly “distressed” comparable sales used by the IRS’s expert.

2. Summary of the Opinion

Judge Branch dissented, arguing the Tax Court’s omission of explicit highest-and-best-use findings violated regulatory requirements and impeded meaningful appellate review.

3. Analysis

3.1 Precedents Cited

• Carter v. Comm'r, No. 20- 12200, 2022 WL 4232170 (11th Cir. Sept. 14, 2022): Provided the procedural backdrop—this was the second appeal; the first resolved the “granted-in-perpetuity” dispute under 26 U.S.C. § 170(h)(2)(C) and led to remand.
• INDOPCO, Inc. v. Comm'r, 503 U.S. 79 (1992) and Interstate Transit Lines v. Comm'r, 319 U.S. 590 (1943): Anchored the burden principle that deductions are “a matter of legislative grace” and taxpayers must “clearly” prove entitlement and amount—central to affirming a low valuation where the Tax Court found taxpayers’ proof unreliable.
• TOT Prop. Holdings, LLC v. Comm'r, 1 F.4th 1354 (11th Cir. 2021) and Pine Mountain Pres., LLLP v. Comm'r, 978 F.3d 1200 (11th Cir. 2020): Supplied the governing conservation-easement valuation framework, including use of the regulatory “before-and-after” method when comparable easement sales are lacking, and the centrality of fair market value under 26 C.F.R. § 1.170A-14(h)(3)(i).
• Est. of Jelke v. Comm'r, 507 F.3d 1317 (11th Cir. 2007): Framed review standards—de novo for legal standards applied; clear error for factual premises in valuation.
• United States v. Graham, 123 F.4th 1197 (11th Cir. 2024), United States v. Brown, 415 F.3d 1257 (11th Cir. 2005), and Braden v. United States, 365 U.S. 431 (1961): Supported abuse-of-discretion review for evidentiary/expert rulings and the legal nature of relevancy/materiality concepts.
• Anderson v. City of Bessemer City, 470 U.S. 564 (1985): Was pivotal to affirmance—when a trial judge credits one coherent expert over another and the choice is not contradicted by extrinsic evidence or internally inconsistent, appellate courts rarely find clear error.
• Palmer Ranch Holdings Ltd v. Comm'r, 812 F.3d 982 (11th Cir. 2016) and Gatlin v. Comm'r, 754 F.2d 921 (11th Cir. 1985): Reinforced that the taxpayer bears the burden to prove the amount of the deduction “at all times,” enabling affirmance even where taxpayers identified other potentially relevant market facts.
• Access Now, Inc. v. Sw. Airlines Co., 385 F.3d 1324 (11th Cir. 2004) and Irving v. Mazda Motor Corp., 136 F.3d 764 (11th Cir. 1998): Underpinned the waiver holding: a party cannot raise a new theory (including a different highest-and-best-use position) for the first time on appeal.

Dissent-focused authorities: Judge Branch relied on Savannah Shoals, LLC v. Comm'r, --- F.4th ----, 2026 WL 2056291 (11th Cir. July 16, 2026), PBBM-Rose Hill, Ltd. v. Comm'r, 900 F.3d 193 (5th Cir. 2018), Curtis v. Comm'r, 623 F.2d 1047 (5th Cir. 1980), Smith v. Georgia, 684 F.2d 729 (11th Cir. 1982), Whitehouse Hotel Ltd. v. Comm'r, 615 F.3d 321 (5th Cir. 2010), and Bonner v. City of Prichard, 661 F.2d 1206 (11th Cir. 1981) to argue that explicit findings are required for reviewability and regulatory compliance.

3.2 Legal Reasoning

(a) Conservation-easement valuation framework

Applying Pine Mountain Pres., LLLP v. Comm'r and TOT Prop. Holdings, LLC v. Comm'r, the court reiterated that the easement’s value is the fair market value of the perpetual restriction at the time of contribution. With no meaningful market for comparable easement sales, the parties agreed the “before-and-after” method governed: the easement value equals the difference between the property’s fair market value before and after the restriction, under 26 C.F.R. § 1.170A-14(h)(3)(i).

(b) Deference to the Tax Court’s expert-credibility and valuation choices

The core affirmance rested on deference. The Tax Court found taxpayers’ experts’ methodology unreliable because they could not coherently justify why the easement reduced value by 30% (a “summation” of percentages tied to docks, waterfrontage, and unit limits). It found the IRS expert’s analysis “sound” and his defense of comparables persuasive, leading to a $1,000,000 valuation.

The Eleventh Circuit treated this as a classic factfinding choice between experts. Citing Anderson v. City of Bessemer City and United States v. Brown, it held the Tax Court’s credibility determination was not clearly erroneous. The burden of proving the amount of the deduction remained with taxpayers (INDOPCO, Inc. v. Comm'r; Palmer Ranch Holdings Ltd v. Comm'r), so identifying other evidence of value did not compel reversal absent a clear error in the court’s weighing of proof.

(c) Highest and best use: implicit adoption and waiver

Regulations require consideration of highest and best use in before-and-after valuation. The majority concluded the Tax Court did not reversibly err because the experts agreed the highest and best use was “to hold for development,” and thus a “formalistic” analysis was unnecessary. Further, to the extent taxpayers wanted a different highest-and-best-use conclusion, the court held they could not raise it first on appeal (Access Now, Inc. v. Sw. Airlines Co.).

The dissent countered that “how immediate or remote” development is forms part of highest and best use under 26 C.F.R. § 1.170A-14(h)(3)(ii), and the parties disputed timing. It argued the absence of explicit findings prevented appellate assurance that the proper regulatory methodology was applied, relying on Curtis v. Comm'r and analogizing to Whitehouse Hotel Ltd. v. Comm'r.

(d) Distressed sales

The court rejected the claim that reliance on “distressed sales” invalidated the IRS expert’s comparables. The opinion treated this as part of the overall credibility and comparability dispute that the Tax Court resolved in the IRS expert’s favor.

3.3 Impact

• Appraisal methodology scrutiny: The decision signals that, in the Eleventh Circuit, a conservation-easement appraisal may be sharply discounted if the discount rate or percentage diminution lacks an explainable, defensible methodology. Courts may credit a more transparent comparable-sales approach even when taxpayers point to other market indicators (offers, prior interest sales), so long as the Tax Court explains why it found one expert more reliable.
• Procedural discipline on highest and best use: The majority’s waiver framing encourages litigants to clearly preserve and litigate highest-and-best-use disputes (including development timing) in the Tax Court. The dissent highlights a potential future fault line: whether implicit adoption suffices or explicit findings are required where timing or legal permissibility is contested.
• Deference and “distressed” comparables: The ruling suggests that challenges to comparables as “distressed” will often be treated as weight/credibility issues, reviewed deferentially, rather than as legal errors—raising the premium on developing the record and cross-examination to show non-comparability.

4. Complex Concepts Simplified

• Conservation easement: A legal restriction voluntarily placed on land that limits development to protect conservation values. If it meets tax-law requirements, donating it to a qualified organization can generate a charitable deduction.
• “Granted in perpetuity” requirement: The easement restrictions must last forever; otherwise, the contribution is not a “qualified conservation contribution.” (This requirement was litigated in the prior appeal.)
• Fair market value: The price a willing buyer and willing seller would agree to, with neither forced to act and both having reasonable knowledge.
• Before-and-after method: If direct market evidence of easement sales is limited, value the easement as: (Value of the property before the restriction) − (Value of the property after the restriction).
• Highest and best use: The most valuable legally permissible and reasonably probable use of the property (e.g., near-term mixed-use development versus long-term speculative holding). Under 26 C.F.R. § 1.170A-14(h)(3)(ii), the analysis includes how likely and how soon development would occur absent the easement.
• Standards of review: “De novo” means the appellate court decides a legal issue anew. “Clear error” means factual findings stand unless a serious mistake is shown. “Abuse of discretion” is highly deferential for evidentiary/expert-admission rulings.

5. Conclusion

The Eleventh Circuit affirmed a dramatic reduction in claimed conservation-easement value by emphasizing (i) the taxpayer’s burden to prove the amount of any deduction, (ii) deference to the Tax Court’s choice among competing experts when supported by a reasoned credibility assessment, and (iii) waiver principles limiting new highest-and-best-use arguments on appeal. The dissent underscores a continuing doctrinal tension in conservation-easement valuation cases: whether the Tax Court must make explicit highest-and-best-use findings—especially about the immediacy of development—to satisfy the regulatory valuation method and enable meaningful appellate review.