How to Appeal Your Detroit Property Tax Assessment

To appeal your Detroit property tax assessment, file a written protest with the city’s March Board of Review by the March deadline printed on your assessment notice, then, if the Board denies you or doesn’t cut the value enough, petition the Michigan Tax Tribunal by June 30 of the tax year.¹² For 2026, the Board convenes March 3 through April 6, with petitions due by 4:30 p.m. on March 9. Skip the March step and the Tax Tribunal will not hear your valuation case.

When You Have Grounds To Appeal

The core question the Board of Review decides is whether your Assessed Value exceeds 50% of what your property would actually sell for. If it does, you have a case. Beyond straight overvaluation, common grounds include:

Wrong property classification, such as a home coded as commercial, which changes the millage rates that apply.
Clerical errors in the assessor’s record: wrong square footage, wrong lot size, phantom bedrooms, features that don’t exist.
Condition problems the mass-appraisal model missed, like fire damage, flooding, foundation issues, or serious deterioration.
Recent sales of comparable nearby homes that point to a lower market value than the assessor calculated.

The Office of the Assessor values more than 378,000 parcels a year, so individual errors are common.³ The appeals process exists for exactly that reason.

Evidence That Actually Moves the Board

Start with your Notice of Assessment (Form L-4400), which Detroit mails in early February. It lists your Assessed Value, Taxable Value, and classification for the year, and it carries the parcel identification number you’ll need on any petition.⁴

The strongest single piece of evidence is a professional appraisal by a licensed appraiser, ideally completed within six months of December 31 so it reflects conditions on Michigan’s statutory “tax day.”⁵ A full residential appraisal typically runs $450 to $1,200. Weigh that against the savings: a $5,000 cut in Assessed Value on a home taxed at roughly 70 mills is around $350 a year, which pays back the appraisal over a few years and keeps compounding because the annual cap on Taxable Value increases then applies to the lower number.

If an appraisal is out of reach, put together closing statements or listing data on three to five comparable sales in your neighborhood, plus photographs of any structural damage, water intrusion, or interior deterioration. The Board needs concrete evidence that the assessed value exceeds 50% of true cash value. Opinions won’t do it.

The Optional February Assessors Review

Before the formal March hearings, Detroit runs an informal Assessors Review. For 2026 it runs February 1 through February 22, closing at 4:30 p.m., and lets you submit evidence directly to the assessor’s office for a quick correction.⁶

Use it for easy fixes, like a square-footage error in the record. But know the trap: participating in the Assessors Review does not preserve your right to appeal further. Only a formal protest to the March Board of Review keeps the door to the Michigan Tax Tribunal open.⁶ Even if the assessor agrees to a February correction, file a March petition anyway if you might want to escalate.

Filing With the March Board of Review

The March Board of Review is Detroit’s formal appeals body. For the 2026 cycle it sits from Tuesday, March 3 through Monday, April 6, and petitions must be filed by 4:30 p.m. on March 9, 2026.¹ Michigan law requires the Board to sit at least 12 hours during the week of the second Monday in March to hear protests.⁷

You can submit your petition three ways:

Online at detroitmi.gov/mbor, where you can file, schedule a hearing, and upload supporting documents.
By email or in person to the Assessor’s Office at the Coleman A. Young Municipal Center.
By mail to the Assessor’s Office, with materials arriving by the March 9 deadline.

Filing by mail waives your in-person hearing. That’s fine for a clean clerical correction. If your appeal turns on explaining why your comparable sales tell a different story than the assessor’s model, show up in person so you can answer questions from the Board.

You’ll receive a written Notice of Board of Review Action, typically in late May or June, stating whether the value was sustained, reduced, or adjusted. If the answer disappoints you, the clock is already running on your next step.

Appealing to the Michigan Tax Tribunal

If the Board denies your appeal or doesn’t lower the value enough, file a written petition with the Michigan Tax Tribunal by June 30 of the tax year. The deadline is firm. In the Small Claims Division, the petition counts as filed if it is postmarked by first-class mail or delivered in person by June 30.²

Most Detroit homeowners file in the Small Claims Division, which covers residential property, agricultural property, and rentals with fewer than four units.⁸ The process is less formal than the Entire Tribunal. You can submit a Petition for Valuation Appeal through the Tribunal’s e-filing system or by mail to the Lansing office.⁹ A filing fee applies; the amount varies.

The jurisdictional rule to remember: for a valuation dispute, you must have protested to the March Board of Review first. Skip that step and the Tribunal cannot hear your case.

Commercial and Industrial Property

Owners of commercial, industrial, developmental, or utility property can bypass the local Board of Review and file directly with the Tax Tribunal. The deadline for these direct appeals is May 31 of the tax year. Personal property in these categories also qualifies for direct filing if the owner submitted a personal property statement to the city before the March Board began. These cases go to the Entire Tribunal, with more formal proceedings and stricter evidentiary rules, and many owners work with attorneys or tax consultants at that stage.

After a Successful Appeal

A win at the Board of Review produces a revised Taxable Value that lowers both your summer and winter bills for the year. Because Proposal A’s annual cap on Taxable Value increases then applies to the new lower figure, the reduction carries forward and compounds.

If you already paid the higher bill, the city treasury will issue a refund. Detroit processes refunds within roughly 90 business days, plus another 10 to 15 business days for verification, printing, and mailing, and peak tax seasons can stretch that timeline.¹⁰

Keep copies of the petition, your evidence, the Board’s written decision, and any revised notices. If you appeal again in a future year, a documented history of prior reductions strengthens your case and saves rebuilding the file from scratch.

One boundary worth noting: an assessment appeal challenges your property’s value. It is not the same as claiming an exemption. If your bill is high because you recently bought the home and your Taxable Value “uncapped,” or because you never filed for the Principal Residence Exemption, the HOPE program for lower-income homeowners, or the Disabled Veterans Exemption, those are separate applications handled through the assessor’s office, not through the Board of Review.

1
City of Detroit. Property Assessment Board of Review
2
Michigan Legislature. Michigan Compiled Laws 205.735
3
City of Detroit. Base Unit Tools
4
City of Detroit. Notice of Assessment, Taxable Valuation, and Property Classification
5
Michigan Legislature. Michigan Compiled Laws 211.2
6
City of Detroit. Assessor Review
7
Michigan Legislature. Michigan Compiled Laws 211.30
8
State of Michigan. Tax Tribunal Rules
9
State of Michigan. Small Claims
10
City of Detroit. Detroit Taxpayer Service Center FAQs