Fort Gratiot Township property taxes & housing data
Fort Gratiot Township is taxed at 28.1448 mills across 1 school district. That is 1.08 mills above the St. Clair County median and 4.46 mills below the Southeast Michigan median — the 21st lowest of 31 municipalities in the county, and 85 of 236 region-wide.
Rates by school district
| School district | Homestead | Non-homestead | $250,000 | $350,000 | $500,000 |
|---|---|---|---|---|---|
| Port Huron Area Schools | 28.1448 | 46.1448 | $3,518 | $4,925 | $7,036 |
Homestead (PRE) applies to your primary residence. Non-homestead applies to rentals and second homes. Dollar columns are the annual bill at the uncapped taxable value — half the purchase price — at the homestead rate.
How Fort Gratiot Township compares in St. Clair County
| Municipality | Lowest millage | Annual tax on $350,000 |
|---|---|---|
| Mussey Township | 27.1917 | $4,759 |
| East China Township | 27.2762 | $4,773 |
| Ira Township | 27.5526 | $4,822 |
| Kenockee Township | 27.6076 | $4,831 |
| Fort Gratiot Township | 28.1448 | $4,925 |
| Brockway Township | 28.6411 | $5,012 |
| Port Huron Township | 30.9408 | $5,415 |
| Algonac | 37.2823 | $6,524 |
| Marine City | 38.1132 | $6,670 |
← Kenockee Township (lower) · Brockway Township (higher) →
For sale in Fort Gratiot Township right now
30 active listings in Fort Gratiot Township — the 6 newest below. Remember: every one of them uncaps the year after closing, so the bill you should budget is the uncapped one above, not the seller's.
$325,000
3956 Keewahdin Road · Fort Gratiot Township
3 bd · 2 ba · 1,620 sqft
Listing courtesy of Unique Properties Real Estate
$499,900
3276 Shorewood AVE · Fort Gratiot Township
4 bd · 3 ba · 3,054 sqft
Listing courtesy of Realty Executives Home Towne Shelby
$599,900
4333 Gratiot AVE · Fort Gratiot Township
4 bd · 4 ba · 3,500 sqft
Listing courtesy of Epique Inc.
$409,000
3974 Stoney Ridge Drive · Fort Gratiot Township
3 bd · 3 ba · 3,899 sqft
Listing courtesy of Hanging Gardens Real Estate LLC
$299,900
4006 N River Road Road · Fort Gratiot Township
3 bd · 2 ba · 2,212 sqft
Listing courtesy of Berkshire Hathaway HomeServices Kee Realty Ft Gra
$422,000
3799 Arlington Avenue · Fort Gratiot Township
4 bd · 3 ba · 3,016 sqft
Listing courtesy of Realty Executives Home Towne
IDX provided courtesy of Realcomp II Ltd. via Match Realty LLC and MiRealSource, Realcomp II Ltd, ©2026 Realcomp II Ltd. Shareholders. The accuracy of all information, regardless of source, is not guaranteed or warranted. All information should be independently verified. Listings refreshed 2026-09-04T09:58-04:00; refreshed at least twice daily.
Waterfront in Fort Gratiot Township: Lake Huron · Black River — recorded sale prices and all-sports status for each.
Compare Fort Gratiot Township with another community
Fort Gratiot Township has 10 side-by-side comparisons, 8 of them with a community that shares a school district — same schools, different bill. Dollar columns are the annual homestead bill on a $350,000 home at the uncapped taxable value, and the last column is the difference against Fort Gratiot Township.
| Comparison | Their lowest millage | Annual tax on $350,000 | vs Fort Gratiot Township |
|---|---|---|---|
| Fort Gratiot Township vs Port Huron · same schools | 41.3099 | $7,229 | +$2,304 |
| Fort Gratiot Township vs Burtchville Township · same schools | 24.5387 | $4,294 | −$631 |
| Fort Gratiot Township vs Port Huron Township · same schools | 30.9408 | $5,415 | +$489 |
| Fort Gratiot Township vs Wales Township · same schools | 25.7073 | $4,499 | −$427 |
| Fort Gratiot Township vs Clyde Township · same schools | 25.7133 | $4,500 | −$426 |
| Fort Gratiot Township vs Grant Township · same schools | 25.7171 | $4,500 | −$425 |
| Fort Gratiot Township vs Kimball Township · same schools | 26.3624 | $4,613 | −$312 |
| Fort Gratiot Township vs Ira Township | 27.5526 | $4,822 | −$104 |
| Fort Gratiot Township vs Kenockee Township · same schools | 27.6076 | $4,831 | −$94 |
| Fort Gratiot Township vs Brockway Township | 28.6411 | $5,012 | +$87 |
What it's like to own in Fort Gratiot Twp
Beyond the tax rate, three things shape what owning in Fort Gratiot Twp actually costs: the age of the homes, what the water utility reports at the tap, and what local air testing has turned up. Each figure below carries the date of the survey it came from.
Housing stock
1971
average year built · 1,757 sqft average across 3,138 single-family homes
SEMCOG Buildings_2024
Radon
1.38 pCi/L
average across 30 home tests · 6% above the EPA 4 pCi/L action level — low. ZIP 48059.
MDHHS indoor radon test results by ZIP
Lead is measured at the water system, not the house — it cannot tell you whether a specific property has a lead service line. Radon is a ZIP-level test distribution, not a prediction for any one home; the EPA recommends testing every home regardless. Screening information only.
Common questions
What is the property tax rate in Fort Gratiot Township, Michigan?
Fort Gratiot Township is taxed at 28.1448 mills for a homestead (principal residence) under the official 2025 Michigan Department of Treasury millage report. On a $350,000 home at the uncapped taxable value that is about $4,925 a year.
Does the tax rate change by address within Fort Gratiot Township?
No. All of Fort Gratiot Township sits in Port Huron Area Schools, so the millage is 28.1448 at every address in the municipality. Your bill still changes after you buy, because it is recalculated on the uncapped taxable value rather than the seller's capped one.
How much are property taxes on a $350,000 home in Fort Gratiot Township?
About $4,925 a year at the homestead rate. Michigan taxes the taxable value, not the sale price, and after a sale that value uncaps to roughly half what you paid — so $350,000 is taxed on about $175,000.
Why is the tax bill on a Fort Gratiot Township listing lower than what I would pay?
Because the figure on the listing is the seller's. Michigan caps annual taxable-value growth while an owner keeps the property, and that cap is removed the year after it sells. The longer the seller owned it, the further their bill sits below yours.
How does Fort Gratiot Township compare with the rest of St. Clair County?
It is the 21 lowest of 31 municipalities in St. Clair County and 85 of 236 across the eight-county region — 1.08 mills above the county median.
Is down payment assistance available for homes in Fort Gratiot Township?
Likely, but verify per program: 96% of the 80 Fort Gratiot Township sales evaluated by Down Payment Resource over the last 12 months were flagged as potentially matching at least one assistance program. The flag is an indicator, not a promise — compare the programs and check your numbers.
What your Fort Gratiot Township taxes become after you buy
Michigan taxable value uncaps the year after a sale and resets to roughly half the purchase price. The calculator below is already set to Fort Gratiot Township — enter a price and the seller's current taxable value.
Uncapping calculator
When a Michigan home changes hands, its taxable value uncaps the following year and resets to roughly half the sale price. Buyers routinely get blindsided by a bill that's thousands higher than the listing showed. Here's your actual number.
What will your tax bill be after closing?
Your taxable value uncaps the year after closing and resets to roughly half the purchase price — so a $350,000 home is taxed on about $175,000, whatever the seller was paying. Enter the price and the current taxable value below.