Iowa Property Tax Appeals: April 2-30 Protest Window

How Iowa Property Tax Protests Work

In Iowa you start with a written protest to your county Board of Review. If you lose there, you can go to the state Property Assessment Appeal Board (PAAB) or skip it and go straight to district court. The protest window is the same every year, and it is short. Iowa Code 441.37

The Deadline: April 2 Through April 30

The statute says you may file a protest with the Board of Review on or after April 2, to and including April 30, of the year of the assessment. The protest must be in writing on the Iowa Department of Revenue's form and be signed by you or your authorized agent. You can have an oral hearing if you ask for one in writing when you file. In a county declared a disaster area after March 1 and before May 20, the filing period extends to May 1 through June 5 and the board can stay in session until July 15. Iowa Code 441.37

Polk County adds the practical rules: file in person or postmark the protest from April 2 to April 30, and if April 30 falls on a weekend, the deadline extends to the next business day. Return the form by email, fax, mail or in person. The Board of Review meets in May and usually finishes before May 31. Polk County Assessor, Appealing Your Assessment

Do You Get a Notice?

Not every year. Polk County says the assessor must notify each owner of their assessment every odd year, by April 1. In even years, the assessor must send a notice only if the assessed value changed. You can still protest in a year without a notice. Polk also lets you request an informal review with an assessor from April 2 to April 25, and an agreement there can save you from filing a protest. Polk County Assessor, Appealing Your Assessment

The Five Grounds

Your protest must be confined to one or more of these grounds:

1. The assessment is not equitable compared with assessments of other like property in the taxing district.
2. The property is assessed for more than the value authorized by law.
3. The property is not assessable, is exempt, or is misclassified.
4. There is an error in the assessment.
5. There is fraud or misconduct in the assessment, which must be specifically stated.

Iowa Code 441.37

Polk County calls "assessed for more than the value authorized by law" by far the most frequently used ground. It suggests evidence such as an appraisal, a recent sales listing or sale contract, three to five sales of comparable properties, and photos or inspection reports showing deficiencies like termite damage or a problem basement wall. It also warns that the equity ground can backfire: if the board finds your neighbors under-assessed, it may raise their assessments rather than lowering yours. Polk County Assessor, Appealing Your Assessment

If the Board of Review Says No

You can appeal the Board of Review's decision to the Property Assessment Appeal Board, with the appeal filed within 20 days after the date the Board of Review adjourns or May 31, whichever is later. The appeal states the basis and the relief sought, and you can plead new grounds beyond those in your protest. Or you can bypass PAAB and appeal to district court under Iowa Code 441.38. Polk County notes that a PAAB decision can then be appealed to district court. Iowa Code 441.37A Polk County Assessor, Appealing Your Assessment

If the board finds fraud or misconduct in the assessment and rules for you, your reasonable costs of bringing the protest, including legal, appraisal and witness fees, are paid from the assessment expense fund. Iowa Code 441.37

Homestead Credit and the 65+ Exemption

Iowa has a homestead tax credit for people who own and occupy their home. Since House File 718 in 2023, owners who are 65 or older on or before January 1 of the assessment year can also claim a homestead exemption. Polk County lists it as $6,500 of taxable value for assessment years beginning on or after January 1, 2024. The application is due July 1 on Department of Revenue form 54-028, one title holder can sign, and once granted it continues without refiling as long as you qualify. If July 1 falls on a weekend, the deadline moves to the next business day. Polk County Assessor, Homestead Credit and Exemption

Where the Windows Stand Now

Iowa's April 2026 window has closed. The next window is April 2 to April 30, 2027, and the Polk and Linn county guides below show that date. The 65+ homestead exemption application is due July 1 each year. Assessment notices for 2027 (an odd year) are due by April 1.

Where Grove Hopper Fits

Grove Hopper is a research tool. We look at your property, flag whether it looks over-assessed and prepare your appeal documents. You review, sign and file them with your county Board of Review yourself. We are not attorneys, accountants or a tax firm. The free check is at the top of this page.

Pick your county below for its assessor and Board of Review details.