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TownhouseResidential
$693,486$323 / 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 $453,150 on Jul 11, 2018

21636 MERION ST

ASHBURN, VA 20147
4
Beds
2.5
Baths
2,148 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.
3,920 ft²
Lot SizeThe size of the land the home sits on, from county records.
2003
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$693K
$668K low$719K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$453,150 · Jul 11, 2018

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,679 (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.$705,440 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$198,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$506,940
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$715,960
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$705,440

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.39
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
3
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.
82
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.Duplex Single
CountyLOUDOUN
Lot (acres)The size of the land the home sits on, from county records.0.09
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
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

Transaction History(2)

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
Hillside Elementary SchoolA
Elementary · Grades PK–5 · 0.5 mi
M
Eagle Ridge Middle SchoolA+
Middle · Grades 6–8 · 0.7 mi
H
Briar Woods High SchoolA
High · Grades 9–12 · 2.4 mi

District: Loudoun County Public Schools

Neighborhood · ZIP 20147These 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.79
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.82
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.42

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.38%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.5%
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.65,613
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,475 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$152,209
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$178,847
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%

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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

21636 Merion 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.

  • Costs more per square foot than 69% of homes in Loudoun County
  • Smaller than 67% of homes in Loudoun County
  • Has a smaller lot than 68% of homes in Loudoun County

What homes are worth in Ashburn 20147

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

This home
$346K$1.5M

This home is worth more than 43% of homes in Ashburn 20147.

How it measures up in Ashburn 20147

The dot is this home. The mark in the middle is the typical home in Ashburn 20147.

Estimated value$693,486
CheaperTypical $751,843Pricier

Pricier than 43% of homes nearby

Price per ft²$323
CheaperTypical $304Pricier

Pricier than 67% of homes nearby

Living area2,148 ft²
SmallerTypical 2,447 ft²Bigger

Bigger than 37% of homes nearby

Lot size3,920 ft²
SmallerTypical 0.1 acBigger

Bigger than 45% of homes nearby

Year built2003
OlderTypical 2000Newer

Newer than 64% of homes nearby

How 21636 Merion St ranks against every home in each area.
MeasureThis homeAshburn 20147Loudoun County
Estimated valuepricier than$693,48643% of homes37% of homes
Price per ft²pricier than$32367% of homes69% of homes
Living areabigger than2,148 ft²37% of homes33% of homes
Lot sizebigger than3,920 ft²45% of homes32% of homes
Year builtnewer than200364% of homes53% of homes

About 21636 Merion St

How much is 21636 Merion St, Ashburn, VA worth?

The TopHap Estimate for 21636 Merion St, Ashburn, VA is $693,486 as of Aug 30, 2026. The likely range is $667,739 to $719,233. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21636 Merion St, Ashburn, VA last sell?

21636 Merion St, Ashburn, VA last sold on Jul 11, 2018 for $453,150, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 21636 Merion St, Ashburn, VA?

21636 Merion St, Ashburn, VA has 4 bedrooms, 2.5 bathrooms, 2,148 square feet of living space and a 0.09-acre lot.

When was 21636 Merion St, Ashburn, VA built?

21636 Merion St, Ashburn, VA was built in 2003, making it 23 years old. It is a duplex single home. The building has 2 stories.

What schools serve 21636 Merion St, Ashburn, VA?

21636 Merion St, Ashburn, VA is assigned to Hillside Elementary School (elementary), rated A; Eagle Ridge Middle School (middle), rated A+; Briar Woods High School (high), rated A. All sit in Loudoun County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21636 Merion St, Ashburn, VA compare to other homes in Ashburn 20147?

Among the 20,122 homes in Ashburn 20147, it is worth more than 43% of them ($693,486 against a typical $751,843), its price per square foot is higher than 67% of them ($323 against a typical $304), it is bigger than 37% of them (2,148 ft² against a typical 2,447 ft²), its lot is bigger than 45% of them (3,920 ft² against a typical 0.1 ac) and it is newer than 64% of them (2003 against a typical 2000). Measured against all of Loudoun County, it is worth more than 37% 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 21636 Merion St, Ashburn, VA?

The 2026 property tax bill for 21636 Merion St, Ashburn, VA was $5,679. The county assessed it at $705,440.

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