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Single Family ResidenceResidential
$244,273$268 / 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 93How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026

109 KOSTER ST

MADISON, WI 53713
3
Beds
1
Baths
912 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.
0.24 ac
Lot SizeThe size of the land the home sits on, from county records.
1969
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$244K
$227K low$262K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,429 (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.$281,800 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$71,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$210,500
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$256,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$236,323

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
CountyDANE
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1970
Lot (acres)The size of the land the home sits on, from county records.0.24
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
CoolingThe type of cooling or air conditioning in the home.Central
PoolWhether the property has a pool, and what kind, such as in-ground.No
ViewThe type of view from the property, or another feature of the site that affects value.Traffic

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
West High SchoolD+
High · Grades 9–12 · 2.7 mi
M
Cherokee Heights Middle SchoolD
Middle · Grades 6–8 · 3.3 mi
E
Midvale Elementary School
Elementary · Grades PK–2 · 3.4 mi

District: Madison Metropolitan School District

Neighborhood · ZIP 53713These 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.128
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.83
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.21

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.27%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.15%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.22,644
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,368 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$55,222
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$78,431
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%

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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

109 Koster 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 92% of homes in Capitol View
  • Costs more per square foot than 86% of homes in Madison 53713
  • Smaller than 95% of homes in Dane County

What homes are worth in Madison 53713

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

This home
$142K$1.2M

This home is worth more than 35% of homes in Madison 53713.

How it measures up in Madison 53713

The dot is this home. The mark in the middle is the typical home in Madison 53713.

Estimated value$244,273
CheaperTypical $305,032Pricier

Pricier than 35% of homes nearby

Price per ft²$268
CheaperTypical $207Pricier

Pricier than 86% of homes nearby

Living area912 ft²
SmallerTypical 1,563 ft²Bigger

Bigger than 9% of homes nearby

Lot size0.24 ac
SmallerTypical 0.25 acBigger

Bigger than 47% of homes nearby

Year built1969
OlderTypical 1973Newer

Newer than 42% of homes nearby

How 109 Koster St ranks against every home in each area.
MeasureThis homeCapitol ViewMadison 53713Dane County
Estimated valuepricier than$244,2738% of homes35% of homes9% of homes
Price per ft²pricier than$26868% of homes86% of homes61% of homes
Living areabigger than912 ft²19% of homes9% of homes5% of homes
Lot sizebigger than0.24 ac56% of homes47% of homes45% of homes
Year builtnewer than196964% of homes42% of homes43% of homes

About 109 Koster St

How much is 109 Koster St, Madison, WI worth?

The TopHap Estimate for 109 Koster St, Madison, WI is $244,273 as of Oct 21, 2026. The likely range is $226,606 to $261,940. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 109 Koster St, Madison, WI last sell?

109 Koster St, Madison, WI last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 109 Koster St, Madison, WI?

109 Koster St, Madison, WI has 3 bedrooms, 1 bathrooms, 912 square feet of living space and a 0.24-acre lot.

When was 109 Koster St, Madison, WI built?

109 Koster St, Madison, WI was built in 1969, making it 57 years old. It is a ranch home. The building has 1 story.

What schools serve 109 Koster St, Madison, WI?

109 Koster St, Madison, WI is assigned to West High School (high), rated D+; Cherokee Heights Middle School (middle), rated D; Midvale Elementary School (elementary). All sit in Madison Metropolitan School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 109 Koster St, Madison, WI compare to other homes in Madison 53713?

Among the 3,483 homes in Madison 53713, it is worth more than 35% of them ($244,273 against a typical $305,032), its price per square foot is higher than 86% of them ($268 against a typical $207), it is bigger than 9% of them (912 ft² against a typical 1,563 ft²), its lot is bigger than 47% of them (0.24 ac against a typical 0.25 ac) and it is newer than 42% of them (1969 against a typical 1973). Measured against all of Dane County, it is worth more than 9% 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 109 Koster St, Madison, WI?

The 2025 property tax bill for 109 Koster St, Madison, WI was $5,429. The county assessed it at $281,800.

More homes on Koster St

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Assigned schools

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