Background
Arconic US, LLC owns a roughly mile-long aluminum rolling mill in Scott County. The 5.79-million-square-foot industrial complex spans two adjoining parcels in Riverdale and Bettendorf but operates as a single economic unit. For the 2023 assessment, the county valued the parcels at a combined $52,889,200, including $47,624,500 for the Riverdale parcel and $5,264,700 for the Bettendorf parcel.
After the Scott County Board of Review denied Arconic’s protests, the district court tried the matter in equity. It found that Arconic’s evidence shifted the burden to the Board, that the Board met its burden as to the Riverdale parcel but not the Bettendorf parcel, and that the sharply different increases imposed on the two parcels lacked justification. The court retained the Riverdale valuation, reduced the Bettendorf valuation to $2,477,585, and fixed the property’s total value at $50,102,085.
The Court’s Holding
The Iowa Court of Appeals affirmed after reviewing the record de novo. It held that choosing among competing appraisals and assigning weight to recognized valuation approaches were primarily factfinding tasks, and it deferred to the district court’s supported credibility and reliability determinations. The district court could give less weight to the cost approach while still using cost-related evidence and the assessor’s testimony as checks on sales-comparison evidence.
The appellate court gave little weight to the Board appraiser’s sales comparison because he had not adequately identified or adjusted for leased-fee interests, multitenant properties, market timing, and a bankruptcy sale. Even so, the court independently concluded that the Board carried its burden as to the Riverdale parcel. It did not find that the Board carried its burden for the Bettendorf parcel; instead, it upheld the district court’s reduction of that parcel and independently fixed the combined value at $50,102,085. The court also rejected any reliance on assessment parity with other properties, while permitting consideration of evidence that relevant market values had risen after the pandemic.
Key Takeaways
- Once Arconic presented competent evidence that market value differed from the assessment, the burden shifted to the Board under Iowa Code section 441.21(3)(b)(2).
- The Board met that burden for the Riverdale parcel but failed to justify the disproportionate increases imposed on the Bettendorf parcel.
- Comparable sales with unquantified differences in property rights, tenancy, timing, or sale conditions may receive little weight, particularly when required adjustments cannot be made.
Why It Matters
The decision illustrates how Iowa courts independently determine value in property-tax appeals without presuming that an assessment is correct, while still giving weight to trial-level evaluations of competing experts. It also shows that separate tax parcels functioning as one economic unit cannot be subjected to materially different valuation treatment without a persuasive explanation.
The opinion further distinguishes evidence of actual market movement, which may inform value, from evidence that other assessments increased by similar percentages, which cannot establish a property’s market value.