What the Birmingham study shows
Every Michigan community publishes the sales it used to set this year’s values. In Oakland County Equalization’s 2026 residential study for the City of Birmingham, 43 of 441 homes that sold in 2024 and 2025 carry an assessment more than 10 percent above what the buyer paid. That is about 1 in 10. Across all of them, the typical assessment is 49 percent of the sale price, close to the 50 percent the law targets, so most buyers are assessed fairly. The ones who are not can pay hundreds or thousands of dollars a year more than they should.
With a median sale price around $800,000, even a modest gap in Birmingham is a large number of dollars.
One Birmingham sale, from the study
A Birmingham house that sold in October 2024 for $550,000. The study lists its assessment at $343,000, which values it at $686,000: 25 percent above the sale.
Assessor’s value
Twice the assessment in the city’s study.
$686,000
Sold for
The recorded sale, which the city’s own study counts as a valid market sale.
$550,000
Tax on the gap, per year
$2,594
Half the gap between the assessor’s value and the sale price, at the 38.14-mill homestead rate for Birmingham Public Schools. A gap is a reason to look, not proof the value is wrong; the house is shown without its address.
How property tax works in Birmingham
Your bill is figured from your taxable value. While you own a home, it can rise each year by no more than inflation or 5 percent. The year after you buy, that cap comes off and your taxable value resets to the full assessment, so a buyer’s first full bill is set by what the assessor thinks the house is worth. Assessed, state equalized and taxable value, explained.
For a primary residence in Birmingham Public Schools, the 2025 rate is 38.14 mills, or 3.81 percent of taxable value. At that rate, every $10,000 the assessor overstates your home’s value adds about $191 a year to your bill, and keeps adding it every year you own the home.
How to appeal in Birmingham
Birmingham’s assessing is done under contract by Oakland County Equalization, but appeals still go to the City of Birmingham’s own March Board of Review. Your assessment notice arrives in late February and lists your assessed and taxable values, the Board of Review dates and how to book a time. You can also look up your record on the city’s online property lookup.
- March Board of Review. The only time of year to appeal the value itself. Most boards require an appointment, booked by the deadline printed on your notice.
- Bring evidence. Comparable sales, an appraisal, photographs of anything the city’s record gets wrong. A board will not lower a value on an owner’s opinion alone. That evidence is exactly what our appeal packet puts together: your home rebuilt against the city’s own study, the comparable sales that support a lower value, and the filing instructions for your board, for a flat $350.
- If the board says no, you can appeal to the Michigan Tax Tribunal’s Small Claims Division by July 31.
Bought in the last two years?
We check your assessment against the 2026 residential study for Birmingham at no charge, and tell you whether an appeal is worth it.
Source: Oakland County Equalization’s 2026 residential study for the City of Birmingham. Sales coded as arm’s length, 2024 and 2025. A sale counts when its assessment is more than 55 percent of the price. Tax rates from the Michigan Department of Treasury’s 2025 Total Rates report. How our figures are calculated.