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Residential (General/Single)Residential
$49,702
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 75How 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

503 MARTHA ST

BLUE RIVER, WI 53518
0
Baths
0.13 ac
Lot SizeThe size of the land the home sits on, from county records.

Valuation

$50K
$37K low$62K 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.$49,702
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$39,762

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$571 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$39,300 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$4,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$35,100
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$19,800
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$39,600

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.38
43
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
15
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
65
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
62
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
7
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.9 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Residential (General/Single)
CountyGrant
Lot (acres)The size of the land the home sits on, from county records.0.13

Transaction History(1)

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.

H
Riverdale High SchoolB
High · Grades 9–12 · 6.8 mi
M
Riverdale Middle SchoolC-
Middle · Grades 5–8 · 6.8 mi
E
Riverdale Elementary SchoolB-
Elementary · Grades PK–4 · 7.0 mi

District: Riverdale School District

Neighborhood · ZIP 53518These 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.166
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.81
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.15

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.82%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.14%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.13%
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.1,407
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.18 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$64,638
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$88,515
Average tempThe average temperature here across a full year.46°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.Absentee owner
Company ownedWhether the owner is a company or trust rather than a person.Yes

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

503 Martha St 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 98% of homes in Grant County
  • Has a smaller lot than 97% of homes in Blue River 53518

What homes are worth in Blue River 53518

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

This home
$31K$516K

This home is worth more than 7% of homes in Blue River 53518.

How it measures up in Blue River 53518

The dot is this home. The mark in the middle is the typical home in Blue River 53518.

Estimated value$49,702
CheaperTypical $184,853Pricier

Pricier than 7% of homes nearby

Lot size0.13 ac
SmallerTypical 1 acBigger

Bigger than 3% of homes nearby

How 503 Martha St ranks against every home in each area.
MeasureThis homeBlue River 53518Grant County
Estimated valuepricier than$49,7027% of homes2% of homes
Lot sizebigger than0.13 ac3% of homes4% of homes

About 503 Martha St

How much is 503 Martha St, Blue River, WI worth?

The TopHap Estimate for 503 Martha St, Blue River, WI is $49,702 as of Jul 14, 2026. The likely range is $37,475 to $61,929. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

What schools serve 503 Martha St, Blue River, WI?

503 Martha St, Blue River, WI is assigned to Riverdale High School (high), rated B; Riverdale Middle School (middle), rated C-; Riverdale Elementary School (elementary), rated B-. All sit in Riverdale School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 503 Martha St, Blue River, WI compare to other homes in Blue River 53518?

Among the 585 homes in Blue River 53518, it is worth more than 7% of them ($49,702 against a typical $184,853) and its lot is bigger than 3% of them (0.13 ac against a typical 1 ac). Measured against all of Grant County, it is worth more than 2% 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 503 Martha St, Blue River, WI?

The 2025 property tax bill for 503 Martha St, Blue River, WI was $571. The county assessed it at $39,300.

Closest homes

More homes in Blue River 53518

Assigned schools

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