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Single Family ResidenceResidential
$410,710$416 / 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 96How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $129,500 on Jul 13, 1987

9339 BIG RIVER RUN

COLUMBIA, MD 21045
1.5
Baths
988 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.
0.27 ac
Lot SizeThe size of the land the home sits on, from county records.
1971
Year BuiltThe year the home was originally built, according to county records.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$411K
$394K low$428K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$129,500 · Jul 13, 1987

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,789 (2026)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$423,700 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$209,900
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$213,800
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$399,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$423,700

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.Split Foyer
CountyHOWARD
Lot (acres)The size of the land the home sits on, from county records.0.27
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Heat Pump
CoolingThe type of cooling or air conditioning in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 360 ft²

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

H
Oakland Mills High SchoolC+
High · Grades 9–12 · 0.3 mi
M
Oakland Mills Middle SchoolC
Middle · Grades 6–8 · 0.4 mi
E
Stevens Forest Elementary SchoolC+
Elementary · Grades PK–5 · 0.4 mi

District: Howard County Public Schools

Neighborhood · ZIP 21045These 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.113
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.89
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.39

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.28%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.6%
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.40,881
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,128 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$115,208
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$141,105
Average tempThe average temperature here across a full year.54°F
Annual precipHow much rain and melted snow falls here in a typical year.45 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.57%

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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

9339 Big River Run 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 83% of homes in Howard County
  • Costs more per square foot than 95% of homes in Columbia 21045
  • Smaller than 96% of homes in Howard County
  • Has a bigger lot than 66% of homes in Columbia 21045
  • Older than 85% of homes in Columbia 21045

What homes are worth in Columbia 21045

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

This home
$185K$763K

This home is worth more than 30% of homes in Columbia 21045.

How it measures up in Columbia 21045

The dot is this home. The mark in the middle is the typical home in Columbia 21045.

Estimated value$410,710
CheaperTypical $478,355Pricier

Pricier than 30% of homes nearby

Price per ft²$416
CheaperTypical $290Pricier

Pricier than 95% of homes nearby

Living area988 ft²
SmallerTypical 1,548 ft²Bigger

Bigger than 8% of homes nearby

Lot size0.27 ac
SmallerTypical 0.2 acBigger

Bigger than 66% of homes nearby

Year built1971
OlderTypical 1977Newer

Newer than 15% of homes nearby

How 9339 Big River Run ranks against every home in each area.
MeasureThis homeOakland MillsColumbia 21045Howard County
Estimated valuepricier than$410,71027% of homes30% of homes17% of homes
Price per ft²pricier than$41691% of homes95% of homes95% of homes
Living areabigger than988 ft²13% of homes8% of homes4% of homes
Lot sizebigger than0.27 ac65% of homes66% of homes42% of homes
Year builtnewer than197161% of homes15% of homes15% of homes

About 9339 Big River Run

How much is 9339 Big River Run, Columbia, MD worth?

The TopHap Estimate for 9339 Big River Run, Columbia, MD is $410,710 as of Aug 30, 2026. The likely range is $393,556 to $427,864. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 9339 Big River Run, Columbia, MD last sell?

9339 Big River Run, Columbia, MD last sold on Jul 13, 1987 for $129,500, according to the county's recorded deed.

How big is 9339 Big River Run, Columbia, MD?

9339 Big River Run, Columbia, MD has 1.5 bathrooms, 988 square feet of living space and a 0.27-acre lot.

When was 9339 Big River Run, Columbia, MD built?

9339 Big River Run, Columbia, MD was built in 1971, making it 55 years old. It is a split foyer home.

What schools serve 9339 Big River Run, Columbia, MD?

9339 Big River Run, Columbia, MD is assigned to Oakland Mills High School (high), rated C+; Oakland Mills Middle School (middle), rated C; Stevens Forest Elementary School (elementary), rated C+. All sit in Howard County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 9339 Big River Run, Columbia, MD compare to other homes in Columbia 21045?

Among the 12,651 homes in Columbia 21045, it is worth more than 30% of them ($410,710 against a typical $478,355), its price per square foot is higher than 95% of them ($416 against a typical $290), it is bigger than 8% of them (988 ft² against a typical 1,548 ft²), its lot is bigger than 66% of them (0.27 ac against a typical 0.2 ac) and it is newer than 15% of them (1971 against a typical 1977). Measured against all of Howard County, it is worth more than 17% 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 9339 Big River Run, Columbia, MD?

The 2026 property tax bill for 9339 Big River Run, Columbia, MD was $5,789. The county assessed it at $423,700.

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