Skip to content
Skip to content
TopHapOpen in map
TownhouseResidential
$438,118$422 / 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 $204,500 on Jun 29, 2009

21 ALDEN CT

STERLING, VA 20165
2
Beds
1.5
Baths
1,038 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.
1,306 ft²
Lot SizeThe size of the land the home sits on, from county records.
1983
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$438K
$421K low$455K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$204,500 · Jun 29, 2009

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,257 (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.$404,630 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$145,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$259,630
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$408,010
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$404,630

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.41
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
12
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
78
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
80
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
34
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Townhouse
StyleThe architectural style of the home, such as ranch or colonial.Townhouse
CountyLOUDOUN
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.2000
Lot (acres)The size of the land the home sits on, from county records.0.03
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Central
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
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Shed · 32 ft²

Transaction History(5)

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.

E
Countryside Elementary SchoolC+
Elementary · Grades KG–5 · 0.6 mi
M
River Bend Middle SchoolB
Middle · Grades 6–8 · 1.2 mi
H
Potomac Falls High SchoolB
High · Grades 9–12 · 1.6 mi

District: Loudoun County Public Schools

Neighborhood · ZIP 20165These 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.71
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.84
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.37

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.98%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.41%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.2%
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.34,365
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,477 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$168,530
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$209,771
Average tempThe average temperature here across a full year.54°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.63%

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

21 Alden Ct 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 93% of homes in Sterling 20165
  • Costs more per square foot than 96% of homes in Sterling 20165
  • Smaller than 98% of homes in Loudoun County
  • Among the smallest lots in Sterling 20165
  • Older than 90% of homes in Sterling 20165

What homes are worth in Sterling 20165

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

This home
$369K$1.3M

This home is worth more than 7% of homes in Sterling 20165.

How it measures up in Sterling 20165

The dot is this home. The mark in the middle is the typical home in Sterling 20165.

Estimated value$438,118
CheaperTypical $733,707Pricier

Pricier than 7% of homes nearby

Price per ft²$422
CheaperTypical $299Pricier

Pricier than 96% of homes nearby

Living area1,038 ft²
SmallerTypical 2,423 ft²Bigger

Bigger than 4% of homes nearby

Lot size1,306 ft²
SmallerTypical 0.15 acBigger

Smaller than almost all homes nearby

Year built1983
OlderTypical 1994Newer

Newer than 10% of homes nearby

How 21 Alden Ct ranks against every home in each area.
MeasureThis homeSterling 20165Loudoun County
Estimated valuepricier than$438,1187% of homes7% of homes
Price per ft²pricier than$42296% of homes95% of homes
Living areabigger than1,038 ft²4% of homes2% of homes
Lot sizebigger than1,306 ft²almost no homesalmost no homes
Year builtnewer than198310% of homes13% of homes

About 21 Alden Ct

How much is 21 Alden Ct, Sterling, VA worth?

The TopHap Estimate for 21 Alden Ct, Sterling, VA is $438,118 as of Aug 30, 2026. The likely range is $420,903 to $455,333. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Alden Ct, Sterling, VA last sell?

21 Alden Ct, Sterling, VA last sold on Jun 29, 2009 for $204,500, according to the county's recorded deed. TopHap holds 5 recorded sales for this parcel.

How big is 21 Alden Ct, Sterling, VA?

21 Alden Ct, Sterling, VA has 2 bedrooms, 1.5 bathrooms, 1,038 square feet of living space and a 0.03-acre lot.

When was 21 Alden Ct, Sterling, VA built?

21 Alden Ct, Sterling, VA was built in 1983, making it 43 years old. It is a townhouse home. The building has 2 stories.

What schools serve 21 Alden Ct, Sterling, VA?

21 Alden Ct, Sterling, VA is assigned to Countryside Elementary School (elementary), rated C+; River Bend Middle School (middle), rated B; Potomac Falls High School (high), rated B. All sit in Loudoun County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Alden Ct, Sterling, VA compare to other homes in Sterling 20165?

Among the 10,658 homes in Sterling 20165, it is worth more than 7% of them ($438,118 against a typical $733,707), its price per square foot is higher than 96% of them ($422 against a typical $299), it is bigger than 4% of them (1,038 ft² against a typical 2,423 ft²), its lot is bigger than almost none of them (1,306 ft² against a typical 0.15 ac) and it is newer than 10% of them (1983 against a typical 1994). Measured against all of Loudoun County, it is worth more than 7% 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 21 Alden Ct, Sterling, VA?

The 2026 property tax bill for 21 Alden Ct, Sterling, VA was $3,257. The county assessed it at $404,630.

More homes on Alden Ct

Closest homes

More homes in Sterling 20165

Assigned schools

Explore the area

See this home in context

Open 21 Alden Ct 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