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Single Family ResidenceResidential
$1,105,966$284 / 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 95How 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
Last sold for $763,000 on May 20, 2019

11280 RIDERMARK ROW

COLUMBIA, MD 21044
4.5
Baths
3,898 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.
0.37 ac
Lot SizeThe size of the land the home sits on, from county records.
1998
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.1M
$1.1M low$1.2M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$763,000 · May 20, 2019
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.$15,066
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$12,053
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.98%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$610,400
PROSPERITY HOME MORTGAGE LLC · recorded May 20, 2019
2nd MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$480,500
GUARANTEED RATE AFFINITY LLC

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$13,638 (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.$970,667 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$907,700
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,096,600

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyHOWARD
Lot (acres)The size of the land the home sits on, from county records.0.37
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
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.Yes
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 504 ft²Porch · 55 ft²

Transaction History(3)

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
Harper's Choice Middle SchoolB
Middle · Grades 6–8 · 1.0 mi
E
Longfellow Elementary SchoolB-
Elementary · Grades PK–5 · 1.2 mi
H
Wilde Lake High SchoolB-
High · Grades 9–12 · 1.9 mi

District: Howard County Public Schools

Neighborhood · ZIP 21044These 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.123
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.86
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.40

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.32%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.0%
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.44,507
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,688 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$126,288
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$149,553
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%

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

11280 Ridermark Row 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 98% of homes in Harper's Choice
  • Costs less per square foot than 68% of homes in Howard County
  • Bigger than 97% of homes in Columbia 21044
  • Has a bigger lot than 70% of homes in Harper's Choice
  • Newer than 98% of homes in Harper's Choice

What homes are worth in Columbia 21044

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

This home
$205K$1.2M

This home is worth more than 97% of homes in Columbia 21044.

How it measures up in Columbia 21044

The dot is this home. The mark in the middle is the typical home in Columbia 21044.

Estimated value$1,105,966
CheaperTypical $544,971Pricier

Pricier than 97% of homes nearby

Price per ft²$284
CheaperTypical $291Pricier

Pricier than 44% of homes nearby

Living area3,898 ft²
SmallerTypical 1,824 ft²Bigger

Bigger than 97% of homes nearby

Lot size0.37 ac
SmallerTypical 0.31 acBigger

Bigger than 58% of homes nearby

Year built1998
OlderTypical 1983Newer

Newer than 90% of homes nearby

How 11280 Ridermark Row ranks against every home in each area.
MeasureThis homeHarper's ChoiceColumbia 21044Howard County
Estimated valuepricier than$1,105,96698% of homes97% of homes90% of homes
Price per ft²pricier than$28450% of homes44% of homes32% of homes
Living areabigger than3,898 ft²95% of homes97% of homes93% of homes
Lot sizebigger than0.37 ac70% of homes58% of homes55% of homes
Year builtnewer than199898% of homes90% of homes70% of homes

About 11280 Ridermark Row

How much is 11280 Ridermark Row, Columbia, MD worth?

The TopHap Estimate for 11280 Ridermark Row, Columbia, MD is $1,105,966 as of Jul 14, 2026. The likely range is $1,051,351 to $1,160,581. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 11280 Ridermark Row, Columbia, MD last sell?

11280 Ridermark Row, Columbia, MD last sold on May 20, 2019 for $763,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 11280 Ridermark Row, Columbia, MD?

11280 Ridermark Row, Columbia, MD has 4.5 bathrooms, 3,898 square feet of living space and a 0.37-acre lot.

When was 11280 Ridermark Row, Columbia, MD built?

11280 Ridermark Row, Columbia, MD was built in 1998, making it 28 years old. The building has 1 story.

What schools serve 11280 Ridermark Row, Columbia, MD?

11280 Ridermark Row, Columbia, MD is assigned to Harper's Choice Middle School (middle), rated B; Longfellow Elementary School (elementary), rated B-; Wilde Lake High School (high), rated B-. All sit in Howard County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 11280 Ridermark Row, Columbia, MD compare to other homes in Columbia 21044?

Among the 12,933 homes in Columbia 21044, it is worth more than 97% of them ($1,105,966 against a typical $544,971), its price per square foot is higher than 44% of them ($284 against a typical $291), it is bigger than 97% of them (3,898 ft² against a typical 1,824 ft²), its lot is bigger than 58% of them (0.37 ac against a typical 0.31 ac) and it is newer than 90% of them (1998 against a typical 1983). Measured against all of Howard County, it is worth more than 90% 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 11280 Ridermark Row, Columbia, MD?

The 2025 property tax bill for 11280 Ridermark Row, Columbia, MD was $13,638. The county assessed it at $970,667.

More homes on Ridermark Row

Closest homes

More homes in Columbia 21044

Assigned schools

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