What Buyers in Grosse Ile, Wyandotte, Trenton, Riverview, and Across Downriver Should Understand About Proposal A And Property Tax Uncapping
One of the most common questions I hear from buyers across Downriver Michigan communities is this:
"Why did my property taxes increase after buying my home?
The answer comes down to how Michigan's property tax system works under Proposal A, a reform passed in 1994 that limits how quickly property taxes can grow for long-term homeowners.
Understanding this system is important when buying a home anywhere in Wayne County or Downriver, because the seller's current tax bill is often not the amount a new buyer will pay.
Michigan Property Taxes are Based on Taxable Value
In Michigan, property taxes are calculated using the following formula:
Taxes + Taxable Value X Local Millage Rate
But here's where many buyers get confused...
The taxable value is not the same as the market value of a home. Instead, taxable value grows slowly over time because of rules created to protect long-term homeowners from large tax increases.
Proposal A: Protection for Long-Term Michigan Homeowners'
Proposal A limits how much a home's taxable value can increase each year while the same owner holds the property. The increase is capped at the lower of either the rate of inflation or 5%.
This means homeowners who stay in their homes for many years - which is common in communities like Grosse Ile, Trenton, and Wyandotte - often pay taxes based on a much lower taxable value than the home's current market value.
Over time, this creates a growing gap between the market value and taxable value.
What Happens When a Property Sells?
When a property sells in Michigan, the taxable value "uncaps". On January 1st following the sale, the taxable value resets to the property's State Equalized Value (SEV).
The SEV is roughly 50% of the home's market value.
Once that reset happens, the new homeowner's property taxes will be calculated using the updated taxable value. From that point forward, the Proposal A cap applies again.
Why Neighbors in Downriver Can Pay Different Property Taxes
You may notice something interesting in neighborhoods across Downriver communities like Riverview, Allen Park, or Gibraltar. Two homes that may look nearly identical can have very different property tax bills.
That usually happens because one homeowner has owned the property for many years and their taxable value has been capped under Proposal A.
When the home eventually sells, the taxable value resets and the new owner's taxes reflect a more current value.
Assessment Notices and Appeals
Each February, homeowners receive a Notice of Assessment from their local assessor. This document includes:
Assessed Value
State Equalized Value (SEV)
Taxable Value
If the SEV appears higher than approximately 50% of the home's true market value, homeowner's may have the option to appeal through their local Board of Review.
Why This Matters When Buying a Home in Downriver
When budgeting for a home purchase in Downriver or Wayne County, it's important not to rely solely on the seller's current property tax bill.
That number reflects their taxable value, which may have been capped for many years.
A more realistic estimate of your future taxes often comes from calculating how the property's taxable value may reset after the sale.
Understanding this before purchasing can help buyers plan their monthly housing budget more accurately.
Final Thoughts
Michigan's property tax system was designed to protect long-term homeowners from rapidly increasing taxes, while still allowing local governments to adjust taxes when properties change ownership.
For buyers in Downriver communities like Grosse Ile, Wyandotte Trenton, and Riverview, understanding how taxable value, SEV, and Proposal A work can make a big difference when evaluating a home purchase.
If you ever have questions about property taxes, home values, or the local real estate market, feel free to reach out. I'm always happy to help explain how theses systems work so you can make informed decisions.
Most Sincerely,
Heather Polites - Ruzsa
Founder of Moving Downriver and Realtor at MBA Realty
9105 Macomb Street, Grosse Ile, MI 48138
Direct: (734) 934-3292
Email: Heather@MovingDownriver.RealEstate
Website: MovingDownriver.RealEstate
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