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Single Family ResidenceResidential
$239,332$177 / 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 83How 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

309 MERTENS AVE

RACINE, WI 53405
3
Beds
1
Baths
1,350 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.
0.12 ac
Lot SizeThe size of the land the home sits on, from county records.
1957
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$239K
$198K low$281K 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.$239,332
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$191,466

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,406 (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.$191,400 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$15,900
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$175,500
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$191,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$213,123

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.37
40
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
1
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
47
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
65
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
33
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.8 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Ranch
CountyRacine
Lot (acres)The size of the land the home sits on, from county records.0.12
HeatingThe type of heating system in the home.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(4)

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

Foreclosure Filings(1)

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

E
Fratt Elementary SchoolC+
Elementary · Grades KG–5 · 0.8 mi
H
Park High SchoolC+
High · Grades 9–12 · 0.8 mi
M
Mitchell SchoolF
Middle · Grades KG–8 · 2.0 mi

District: Racine School District

Neighborhood · ZIP 53405These 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.98
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.85
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.30

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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.21%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.9%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.25,331
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,749 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$66,464
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$83,982
Average tempThe average temperature here across a full year.48°F
Annual precipHow much rain and melted snow falls here in a typical year.35 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.54%

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

309 Mertens Ave 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 more than 89% of homes in Island Park
  • Bigger than 78% of homes in Island Park
  • Has a smaller lot than 82% of homes in Racine County
  • Newer than 89% of homes in Island Park

What homes are worth in Racine 53405

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

This home
$125K$531K

This home is worth more than 57% of homes in Racine 53405.

How it measures up in Racine 53405

The dot is this home. The mark in the middle is the typical home in Racine 53405.

Estimated value$239,332
CheaperTypical $227,040Pricier

Pricier than 57% of homes nearby

Price per ft²$177
CheaperTypical $186Pricier

Pricier than 44% of homes nearby

Living area1,350 ft²
SmallerTypical 1,275 ft²Bigger

Bigger than 56% of homes nearby

Lot size0.12 ac
SmallerTypical 0.14 acBigger

Bigger than 31% of homes nearby

Year built1957
OlderTypical 1949Newer

Newer than 69% of homes nearby

How 309 Mertens Ave ranks against every home in each area.
MeasureThis homeIsland ParkRacine 53405Racine County
Estimated valuepricier than$239,33289% of homes57% of homes31% of homes
Price per ft²pricier than$17740% of homes44% of homes37% of homes
Living areabigger than1,350 ft²78% of homes56% of homes43% of homes
Lot sizebigger than0.12 ac51% of homes31% of homes18% of homes
Year builtnewer than195789% of homes69% of homes47% of homes

About 309 Mertens Ave

How much is 309 Mertens Ave, Racine, WI worth?

The TopHap Estimate for 309 Mertens Ave, Racine, WI is $239,332 as of Jul 14, 2026. The likely range is $197,790 to $280,874. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 309 Mertens Ave, Racine, WI last sell?

309 Mertens Ave, Racine, WI last sold on Jun 16, 2015, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 309 Mertens Ave, Racine, WI?

309 Mertens Ave, Racine, WI has 3 bedrooms, 1 bathrooms, 1,350 square feet of living space and a 0.12-acre lot.

When was 309 Mertens Ave, Racine, WI built?

309 Mertens Ave, Racine, WI was built in 1957, making it 69 years old. It is a ranch home. The building has 1 story.

What schools serve 309 Mertens Ave, Racine, WI?

309 Mertens Ave, Racine, WI is assigned to Fratt Elementary School (elementary), rated C+; Park High School (high), rated C+; Mitchell School (middle), rated F. All sit in Racine School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 309 Mertens Ave, Racine, WI compare to other homes in Racine 53405?

Among the 9,114 homes in Racine 53405, it is worth more than 57% of them ($239,332 against a typical $227,040), its price per square foot is higher than 44% of them ($177 against a typical $186), it is bigger than 56% of them (1,350 ft² against a typical 1,275 ft²), its lot is bigger than 31% of them (0.12 ac against a typical 0.14 ac) and it is newer than 69% of them (1957 against a typical 1949). Measured against all of Racine County, it is worth more than 31% 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 309 Mertens Ave, Racine, WI?

The 2024 property tax bill for 309 Mertens Ave, Racine, WI was $4,406. The county assessed it at $191,400.

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