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Sioux City to mail more than 30,000 property assessment notices March 25–28; informal and formal appeal windows outlined
Summary
Sioux City Assessor Tyler Erickson said assessment notices will be mailed March 25–28, based on 2024 sales data; informal reviews run April 2–25 and formal appeals to the Board of Review run April 2–30, with the Board meeting May 1–31.
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Tyler Erickson, Sioux City Assessor, told the council the city will mail property assessment notices between March 25 and March 28 and that more than 30,000 notices will be sent this year.
Erickson said assessments are based on actual 2024 sales and explained the timeline and appeal process for property owners. The assessor said the city used sales dated Jan. 1 through Dec. 31, 2024, and cited Iowa Department of Revenue guidance requiring assessments to fall within 95% to 105% of current market value. Erickson said the Iowa Department of Revenue reported 958 residential sales and 40 commercial sales in Sioux City in 2024.
Property owners who disagree with their notice may request an informal review with an assessor between April 2 and April 25. An informal review involves speaking with an appraiser, presenting evidence such as comparable sales or property details, and — if the assessor and petitioning owner reach agreement — signing an agreement that resolves the matter. If the parties cannot agree, the owner may file a formal appeal to the Sioux City Board of Review between April 2 and April 30. The Board of Review meets May 1 through May 31, and may hear appeals in person or review submitted evidence without the petitioner present.
Erickson described the Board of Review as composed of three members selected by the Sioux City Conference Board, which includes members of the city council, the Woodbury County Board of Supervisors and representatives of local school boards. Erickson named the current Board of Review members as Jim Jong, Rodney Rental and Jonathan Bloom and noted the board members are independent of the assessor’s office.
Erickson encouraged residents to pursue informal reviews early in the process; he said the assessor’s office handles a surge of inquiries early in the review window and again at the end of the appeal period, and that inspections requested during the informal window may not be feasible at the last minute.
There was no council vote associated with the assessor’s presentation; Erickson’s remarks were informational and focused on timelines and how property owners can seek review.

