New county data released this month shows several Wayne County suburbs posted double-digit increases in residential assessments for the 2026 roll, and a lot of homeowners are not thrilled with what just landed in their mailboxes. Wayne, River Rouge, Ecorse, and Highland Park were among the communities with gains above 10 percent, while most of the county’s 43 cities and townships recorded more modest 3 to 7 percent increases. Across the region, those notices are kicking up questions about tax bills and how to appeal.
County data and where values climbed
A Wayne County report lays out how assessments shifted across the map, with 43 cities and townships generally seeing residential values rise in the 3 to 7 percent range and a smaller group posting far steeper jumps. County officials say the increases reflect both overall market movement and concentrated sales activity in certain pockets. The new figures will roll into next year’s tax calculations and are the baseline numbers that owners can challenge this appeals season.
Which towns topped the list
The Detroit News reported that Wayne, River Rouge, Ecorse, and Highland Park logged residential assessment hikes above 10 percent. Market data from Redfin shows broader price gains across the county, with year-over-year median sales climbing in many neighborhoods, a pattern that helps explain why assessments in some small, active markets are jumping so sharply. Local officials caution that those headline numbers can be deceptive, since a handful of high-priced sales or new builds can tilt averages in smaller cities.
What's driving the biggest jumps
County assessors and local officials point to two main forces behind the largest moves in residential assessments: new construction, especially infill projects and heavily renovated homes, and the math of percentage gains when values start out low. In communities that have historically had depressed assessments, only a few higher-priced sales or a cluster of newly built homes can push average values up by double digits, making the growth look more dramatic on paper than it may feel on the ground. Those patterns are spelled out in the county’s analysis, which is available through Wayne County.
Tax ripple effects for homeowners
Even with steep new assessment numbers, long-time homeowners are somewhat insulated from big tax spikes. Michigan’s Proposal A caps annual growth in taxable value at the lower of the inflation rate or 5 percent. For 2026, the State Tax Commission set the inflation multiplier at 1.027, or 2.7 percent, which means most properties will see taxable value changes limited to that amount unless there is a transfer of ownership or new construction. When a property sells, its taxable value “uncaps,” and the new owner can face a much higher taxable base the following year, a process detailed by the Michigan Department of Treasury.
Notices, appeals and next steps
Assessment notices with proposed 2026 values went out this spring, and they include instructions for owners who want to push back. CBS Detroit reported that Detroit alone mailed notices to hundreds of thousands of property owners. Anyone who disagrees with their new number can file an appeal with their local board of review or contact their city assessor’s office for help. Most municipal websites post the deadlines, forms, and examples of documentation that can strengthen a case.
For neighborhoods like Highland Park and River Rouge, the latest assessments highlight both growing investor interest and the uneven pace of recovery around Metro Detroit. County officials say they plan to keep up outreach to help residents make sense of the changes, and assessors are quick to remind people that big percentage swings often reflect a small cluster of higher-priced sales, not a wholesale transformation of every block. Homeowners who are unsure about their notice are urged to read it carefully and follow up with their assessor’s office to learn the specific appeal process in their community.
