5th and Walnut Parking, LLC; 5th and Walnut Tower, LLC; 5th and Court, LLC; Justin Mandelbaum; and Sean Mandelbaum v. City of Des Moines

Supreme Court of Iowa·Decided June 12, 2026·No. 24-1886·Published

Opinion

In the Iowa Supreme Court No. 24–1886

Submitted March 25, 2026—Filed June 12, 2026

5th and Walnut Parking LLC, 5th and Walnut Tower LLC, 5th and Court LLC, Justin Mandelbaum, and Sean Mandelbaum,

Appellees,

vs.

City of Des Moines,

Appellant.

City of Des Moines,

Third-Party-Plaintiff Appellant, vs.

John Mandelbaum,

Third-Party-Defendant Appellee.

Appeal from the Iowa District Court for Polk County, Lawrence P.

McLellan, Business Specialty Court Judge.

The City appeals and the developers cross-appeal from a judgment for money damages on a failed real estate project. Appeal Affirmed in Part and Reversed in Part; Cross-Appeal Affirmed.

Waterman, J., delivered the opinion of the court, in which all participating justices joined. McDermott, J., took no part in the consideration or decision of the case.

Thomas G. Fisher Jr. (argued), Deputy City Attorney, and John O.

Haraldson, Assistant City Attorney, Des Moines, for appellant.

Todd M. Lantz (argued), Mark E. Weinhardt, William C. Admussen, and Jason R. Smith of Weinhardt & Lantz, P.C., Des Moines, for appellee.

Waterman, Justice.

The Tower at Fifth and Walnut in downtown Des Moines was supposed to be a testament to modern design, with upscale residential lofts, a movie theater, and ample parking, but what began as a promising urban development devolved into a costly litigation quagmire. This breach of contract case was tried to the court. The trial court’s factual findings are binding upon us if supported by substantial evidence. CMT Highway, LLC v. Logan Contractors Supply, Inc., __ N.W.3d ___, ___, 2026 WL 1108827, at *4 (Iowa Apr. 24, 2026). We view the evidence in a light most favorable to the trial court’s judgment. Id. Our dispositions of the fact-bound issues in this appeal are largely dictated by this standard of review.

For the reasons explained below, we affirm the district court judgment against the City of Des Moines for breach of contract and the damages awarded for that breach in the amount of $4,353,677. We vacate its judgment against the city for tortious interference with contract. And we affirm the district court judgment rejecting the parties’ additional claims for relief.

I. Background Facts and Proceedings.

A. Early Stages of the Fifth and Walnut Development. In 2009, Justin Mandelbaum, a real estate developer who had spent his career to that point working internationally and on the East Coast of the United States, moved back to his hometown of Des Moines. Justin was eager to ply his trade in the local real estate market. He joined Mandelbaum Properties, his family’s real estate development firm, and began hunting for development opportunities in downtown Des Moines.

In 2013, Justin and his team began looking at property around Court Avenue. When a property became available, Justin submitted a request for

proposal (RFP), a document that outlines a development plan that a local government can use to evaluate the benefits of a given project. Justin’s RFP proposed constructing a movie theater and entertainment complex. Despite interest in the RFP, the City of Des Moines (the City) rejected Justin’s proposal in favor of a Hy-Vee grocery store by the Polk County Courthouse.

In 2014, Matt Anderson, the City’s economic development director, approached Justin to discuss another lot near Court Avenue. Anderson told Justin to submit a developer-initiated proposal—a means of streamlining the sale of City land. Justin submitted his proposal.

In the summer of 2015, the Des Moines City Council (City Council) voted to accept for consideration Justin’s proposal and to open a ninety-day competition period, during which time other developers could make a pitch for their projects. No developer submitted a counterproposal.

In December of 2015, Justin and his team submitted a pro forma for the City’s consideration. The pro forma was notable for two reasons. First, part of Justin’s pro forma—and a fly in the ointment throughout this litigation—was a parking garage.

Second, the pro forma contained a 5% development fee for Justin and his team’s work on the project. Pursuant to the pro forma, the City would pay that fee upon completion of the parking garage. Parking garages typically are not profitable on their own. So, to make the project work, Justin needed subsidies.

To begin, the City agreed to sell Justin and his team a site for $4 million dollars, with a forgivable “economic development” loan for the same amount, meaning that Justin would acquire the land for zero net cash outlay. The City also offered tax incentives, bond financing, and shortfall loans to facilitate the project.

In early 2017, after months of negotiations, Justin and the City reached a final development agreement (Development Agreement) for the project. The project was to consist of three elements: a parking garage with space for restaurants and retail stores, which was to be completed by August of 2020; a forty-story tower with a high-end hotel and residential lofts (the Tower), and a theater complex with an upscale dine-in movie theater and additional retail space (the Theater)—both of which were to be completed by August of 2028. By finishing the parking garage first, Justin and his team would provide parking spaces for the City and revenue to pay off their forgivable loan.

Article 8, Section 8.2(E) of the Development Agreement provided:

E. Developer agrees that if the costs of constructing the Parking Garage exceed the Stipulated Price due to no fault of the City, then Developer shall be responsible for the increase in costs associated with completing construction of the Parking Garage. City acknowledges that City is not entitled to participate in any savings realized by Developer in the acquisition, construction or development of the Parking Garage or Parking Parcel, and that any savings or benefits realized shall accrue 100% to Developer.

This meant that if Justin and his team completed the garage under budget, then they were entitled to keep the amount saved.

Under Article 10 of the Development Agreement, both the City and Justin and his team had certain rights. Most importantly for this litigation, Sections 10.1 and 10.4 of the Development Agreement provided the terms governing a default by either party.

Section 10.1 stated:

A. Except as otherwise specifically provided in this Agreement, in the event of a default by either party under this Agreement, the aggrieved party may by written Notice of Default to the party in default, demand that it proceed immediately to cure or remedy such default, and, in any event, complete such cure or remedy within forty-five (45) days (or such other time as may be specifically provided herein) after receipt of such notice. Any default on an

obligation to pay money shall be cured within five (5) business days after receipt of such notice. Notwithstanding the foregoing, if any non-monetary default reasonably requires more than forty-five (45)

days to cure, such default shall not constitute a breach of this Agreement if the defaulting party commences to cure the default promptly upon receipt of the notice of the default and with due diligence thereafter continuously prosecutes such cure to completion.

B. In the event that a Notice of Default is given as provided above and action to cure or remedy the default is not promptly taken or not diligently pursued, or the default is not cured or remedied within the time allowed, then the party in default may be declared to be in breach of this Agreement by the aggrieved party. In the event of a breach of this Agreement, in addition to such other rights as the aggrieved party may have hereunder, the aggrieved party may institute proceedings for damages for breach of contract. In any claim, action or civil proceeding wherein damages are sought for breach of this Agreement, City shall have the same rights and liabilities as a private non-governmental party for any breach of this Agreement.

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5th and Walnut Parking, LLC; 5th and Walnut Tower, LLC; 5th and Court, LLC; Justin Mandelbaum; and Sean Mandelbaum v. City of Des Moines, (iowa 2026).

5th and Walnut Parking, LLC; 5th and Walnut Tower, LLC; 5th and Court, LLC; Justin Mandelbaum; and Sean Mandelbaum v. City of Des Moines (5th and Walnut Parking, LLC; 5th and Walnut Tower, LLC; 5th and Court, LLC; Justin Mandelbaum; and Sean Mandelbaum v. City of Des Moines) — published by Counsel Stack Legal Research, free access to 12M+ legal documents.

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