South Lyon property taxes & housing data
South Lyon is taxed at 42.1483 mills across 1 school district. That is 7.77 mills above the Oakland County median and 9.54 mills above the Southeast Michigan median — the 42nd lowest of 52 municipalities in the county, and 172 of 236 region-wide.
Rates by school district
| School district | Homestead | Non-homestead | $250,000 | $350,000 | $500,000 |
|---|---|---|---|---|---|
| South Lyon Community School District | 42.1483 | 60.1483 | $5,269 | $7,376 | $10,537 |
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 South Lyon compares in Oakland County
| Municipality | Lowest millage | Annual tax on $350,000 |
|---|---|---|
| Farmington Hills | 39.4568 | $6,905 |
| Northville | 39.9709 | $6,995 |
| Keego Harbor | 40.2912 | $7,051 |
| Walled Lake | 40.9991 | $7,175 |
| South Lyon | 42.1483 | $7,376 |
| Huntington Woods | 43.6735 | $7,643 |
| Farmington | 44.5448 | $7,795 |
| Pleasant Ridge | 46.0062 | $8,051 |
| Madison Heights | 46.2962 | $8,102 |
← Walled Lake (lower) · Huntington Woods (higher) →
For sale in South Lyon right now
58 active listings in South Lyon — 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.
$249,800
412 Dorothy Street · South Lyon
2 bd · 2 ba · 1,003 sqft
Listing courtesy of RE/MAX Home Sale Services
$300,000
22240 Quail Run Circle, Unit 2 · South Lyon
2 bd · 3 ba · 2,031 sqft
Listing courtesy of EXP Realty Main
$289,900
1111 Fountain View Circle · South Lyon
3 bd · 3 ba · 1,659 sqft
Listing courtesy of @properties Christie's Int'l R E Clarkston
$75,000
25102 Franklin Terrace, Unit 8 · South Lyon
1 bd · 1 ba · 700 sqft
Listing courtesy of Social House Real Estate Group LLC
$335,000
753 Challenging Trail · South Lyon
2 bd · 3 ba · 2,186 sqft
Listing courtesy of Team Hamilton Real Estate
$600,000
860 N Mill Street · South Lyon
4 bd · 3 ba · 2,676 sqft
Listing courtesy of RE/MAX Classic
IDX provided courtesy of Realcomp II Ltd. via Match Realty LLC and 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.
Compare South Lyon with another community
South Lyon has 11 side-by-side comparisons, 7 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 South Lyon.
| Comparison | Their lowest millage | Annual tax on $350,000 | vs South Lyon |
|---|---|---|---|
| South Lyon vs Green Oak Township · same schools | 25.3046 | $4,428 | −$2,948 |
| South Lyon vs Salem Township · same schools | 26.6161 | $4,658 | −$2,718 |
| South Lyon vs Novi · same schools | 27.1551 | $4,752 | −$2,624 |
| South Lyon vs Lyon Township · same schools | 31.6481 | $5,538 | −$1,838 |
| South Lyon vs Milford Township · same schools | 33.3601 | $5,838 | −$1,538 |
| South Lyon vs Northfield Township · same schools | 35.4789 | $6,209 | −$1,167 |
| South Lyon vs Wixom · same schools | 35.8219 | $6,269 | −$1,107 |
| South Lyon vs Farmington | 44.5448 | $7,795 | +$419 |
| South Lyon vs Keego Harbor | 40.2912 | $7,051 | −$325 |
| South Lyon vs Huntington Woods | 43.6735 | $7,643 | +$267 |
| South Lyon vs Walled Lake | 40.9991 | $7,175 | −$201 |
What it's like to own in South Lyon
Beyond the tax rate, three things shape what owning in South Lyon 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
1987
average year built · 1,969 sqft average across 2,855 single-family homes
SEMCOG Buildings_2024
Lead in drinking water
0 ppb
90th percentile for South Lyon, City Of · below Michigan's 12 ppb action level. Sampled at the fifth liter, which deliberately draws water that sat in the service line and reads higher by design — not comparable to systems that sample standard.
EGLE / MDHHS water-system monitoring, periods ending 2025-12-31
Radon
3.87 pCi/L
average across 893 home tests · 31% above the EPA 4 pCi/L action level — elevated. ZIP 48178.
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 South Lyon, Michigan?
South Lyon is taxed at 42.1483 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 $7,376 a year.
Does the tax rate change by address within South Lyon?
No. All of South Lyon sits in South Lyon Community School District, so the millage is 42.1483 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 South Lyon?
About $7,376 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 South Lyon 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 South Lyon compare with the rest of Oakland County?
It is the 42 lowest of 52 municipalities in Oakland County and 172 of 236 across the eight-county region — 7.77 mills above the county median.
Is down payment assistance available for homes in South Lyon?
Likely, but verify per program: 99% of the 184 South Lyon 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 South Lyon 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 South Lyon — 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.