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Single Family ResidenceResidential
$115,199$240 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 81How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026

8646 RIVER RD

COTTRELLVILLE, MI 48039
2
Beds
1
Baths
480 ft²
Living AreaTotal finished area of the structures, from county records. Some counties include shared space like hallways or a building gym, so it may not match a listing.
0.94 ac
Lot SizeThe size of the land the home sits on, from county records.
1935
Year BuiltThe year the home was originally built, according to county records.

Valuation

$115K
$93K low$137K high
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$115,199
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$92,159

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$796 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$50,400 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$50,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$100,800

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountySt. Clair
Lot (acres)The size of the land the home sits on, from county records.0.94
HeatingThe type of heating system in the home.Space
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(3)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Belle River Elementary SchoolB
Elementary · Grades KG–5 · 3.5 mi
M
Marine City Middle SchoolC+
Middle · Grades 6–8 · 4.0 mi
H
Marine City High SchoolB+
High · Grades 9–12 · 4.0 mi

District: East China School District

Neighborhood · ZIP 48039These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.

CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.108
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.109
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.23

Index scale: 100 = US average (tick). Lower is better.

Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.92%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.11%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.7,472
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.301 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$68,945
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$86,912
Average tempThe average temperature here across a full year.48°F
Annual precipHow much rain and melted snow falls here in a typical year.33 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.53%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

How this home compares

8646 River Rd measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.

  • Worth less than 92% of homes in Marine City 48039
  • Costs more per square foot than 92% of homes in Marine City 48039
  • Among the smallest homes in St. Clair County
  • Has a bigger lot than 68% of homes in Marine City 48039
  • Older than 80% of homes in St. Clair County

What homes are worth in Marine City 48039

Each bar is how many homes fall in that price range. The marker is this home.

This home
$83K$609K

This home is worth more than 8% of homes in Marine City 48039.

How it measures up in Marine City 48039

The dot is this home. The mark in the middle is the typical home in Marine City 48039.

Estimated value$115,199
CheaperTypical $199,992Pricier

Pricier than 8% of homes nearby

Price per ft²$240
CheaperTypical $156Pricier

Pricier than 92% of homes nearby

Living area480 ft²
SmallerTypical 1,396 ft²Bigger

Smaller than almost all homes nearby

Lot size0.94 ac
SmallerTypical 0.25 acBigger

Bigger than 68% of homes nearby

Year built1935
OlderTypical 1968Newer

Newer than 24% of homes nearby

How 8646 River Rd ranks against every home in each area.
MeasureThis homeMarine City 48039St. Clair County
Estimated valuepricier than$115,1998% of homes13% of homes
Price per ft²pricier than$24092% of homes92% of homes
Living areabigger than480 ft²almost no homesalmost no homes
Lot sizebigger than0.94 ac68% of homes62% of homes
Year builtnewer than193524% of homes20% of homes

About 8646 River Rd

How much is 8646 River Rd, Cottrellville, MI worth?

The TopHap Estimate for 8646 River Rd, Cottrellville, MI is $115,199 as of Jul 14, 2026. The likely range is $93,384 to $137,014. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 8646 River Rd, Cottrellville, MI last sell?

8646 River Rd, Cottrellville, MI last sold on Sep 27, 2024, according to the county's recorded deed.

How big is 8646 River Rd, Cottrellville, MI?

8646 River Rd, Cottrellville, MI has 2 bedrooms, 1 bathrooms, 480 square feet of living space and a 0.94-acre lot.

When was 8646 River Rd, Cottrellville, MI built?

8646 River Rd, Cottrellville, MI was built in 1935, making it 91 years old.

What schools serve 8646 River Rd, Cottrellville, MI?

8646 River Rd, Cottrellville, MI is assigned to Belle River Elementary School (elementary), rated B; Marine City Middle School (middle), rated C+; Marine City High School (high), rated B+. All sit in East China School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 8646 River Rd, Cottrellville, MI compare to other homes in Marine City 48039?

Among the 3,253 homes in Marine City 48039, it is worth more than 8% of them ($115,199 against a typical $199,992), its price per square foot is higher than 92% of them ($240 against a typical $156), it is bigger than almost none of them (480 ft² against a typical 1,396 ft²), its lot is bigger than 68% of them (0.94 ac against a typical 0.25 ac) and it is newer than 24% of them (1935 against a typical 1968). Measured against all of St. Clair County, it is worth more than 13% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 8646 River Rd, Cottrellville, MI?

The 2024 property tax bill for 8646 River Rd, Cottrellville, MI was $796. The county assessed it at $50,400.

Closest homes

More homes in Cottrellville 48039

Assigned schools

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