Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$180,438$179 / 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 80How 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

509 ROBIN ST

UNION, MO 63084
2
Beds
2
Baths
1,006 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.
0.4 ac
Lot SizeThe size of the land the home sits on, from county records.
1958
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
4
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$180K
$144K low$217K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,286 (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.$21,833 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$20,748
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$114,910

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.47
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
40
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
80
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
68
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
47
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.

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
CountyFRANKLIN
Lot (acres)The size of the land the home sits on, from county records.0.40
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
PoolWhether the property has a pool, and what kind, such as in-ground.No

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.

M
Union Middle SchoolA-
Middle · Grades 7–8 · 0.7 mi
E
Central Elementary SchoolA-
Elementary · Grades KG–3 · 0.8 mi
H
Union High SchoolB+
High · Grades 9–12 · 1.5 mi

District: Union R-Xi School District

Neighborhood · ZIP 63084These 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.107
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.79
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.99

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.95%
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.5.5%
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.20,185
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.264 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$71,520
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$83,433
Average tempThe average temperature here across a full year.55°F
Annual precipHow much rain and melted snow falls here in a typical year.42 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.57%

Owner Tools

Do you own this home?
Claim this home

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

509 Robin 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 89% of homes in Union 63084
  • Costs less per square foot than 71% of homes in Union 63084
  • Smaller than 81% of homes in Union 63084
  • Older than 83% of homes in Union 63084

What homes are worth in Union 63084

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

This home
$104K$622K

This home is worth more than 11% of homes in Union 63084.

How it measures up in Union 63084

The dot is this home. The mark in the middle is the typical home in Union 63084.

Estimated value$180,438
CheaperTypical $272,886Pricier

Pricier than 11% of homes nearby

Price per ft²$179
CheaperTypical $203Pricier

Pricier than 29% of homes nearby

Living area1,006 ft²
SmallerTypical 1,336 ft²Bigger

Bigger than 19% of homes nearby

Lot size0.4 ac
SmallerTypical 0.44 acBigger

Bigger than 50% of homes nearby

Year built1958
OlderTypical 1989Newer

Newer than 17% of homes nearby

How 509 Robin St ranks against every home in each area.
MeasureThis homeUnion 63084Franklin County
Estimated valuepricier than$180,43811% of homes15% of homes
Price per ft²pricier than$17929% of homes32% of homes
Living areabigger than1,006 ft²19% of homes19% of homes
Lot sizebigger than0.4 ac50% of homes43% of homes
Year builtnewer than195817% of homes21% of homes

About 509 Robin St

How much is 509 Robin St, Union, MO worth?

The TopHap Estimate for 509 Robin St, Union, MO is $180,438 as of Oct 21, 2026. The likely range is $143,783 to $217,093. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 509 Robin St, Union, MO last sell?

509 Robin St, Union, MO last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 509 Robin St, Union, MO?

509 Robin St, Union, MO has 2 bedrooms, 2 bathrooms, 1,006 square feet of living space and a 0.40-acre lot.

When was 509 Robin St, Union, MO built?

509 Robin St, Union, MO was built in 1958, making it 68 years old. The building has 1 story.

What schools serve 509 Robin St, Union, MO?

509 Robin St, Union, MO is assigned to Union Middle School (middle), rated A-; Central Elementary School (elementary), rated A-; Union High School (high), rated B+. All sit in Union R-Xi School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 509 Robin St, Union, MO compare to other homes in Union 63084?

Among the 7,105 homes in Union 63084, it is worth more than 11% of them ($180,438 against a typical $272,886), its price per square foot is higher than 29% of them ($179 against a typical $203), it is bigger than 19% of them (1,006 ft² against a typical 1,336 ft²), its lot is bigger than 50% of them (0.4 ac against a typical 0.44 ac) and it is newer than 17% of them (1958 against a typical 1989). Measured against all of Franklin County, it is worth more than 15% 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 509 Robin St, Union, MO?

The 2025 property tax bill for 509 Robin St, Union, MO was $1,286. The county assessed it at $21,833.

More homes on Robin St

Closest homes

More homes in Union 63084

Assigned schools

Explore the area

See this home in context

Open 509 Robin St on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map