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CondominiumResidential
$615,954
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 88How 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 $550,000 on Jul 27, 2026

42740 RIVER THORNE SQ

ASHBURN, VA 20147
0
Baths
11.41 ac
Lot SizeThe size of the land the home sits on, from county records.

Valuation

$616K
$540K low$692K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$550,000 · Jul 27, 2026
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.$615,954
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$492,763

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$198,191 (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.$24,620,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$24,620,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$30,940,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$24,620,000

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.
13
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
79
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.Condominium
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
CountyLOUDOUN
Lot (acres)The size of the land the home sits on, from county records.11.41
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(11)

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.

H
Stone Bridge High SchoolA+
High · Grades 9–12 · 1.0 mi
E
Belmont Station Elementary SchoolA
Elementary · Grades PK–5 · 1.4 mi
M
Trailside Middle SchoolA+
Middle · Grades 6–8 · 1.6 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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Absentee owner
Company ownedWhether the owner is a company or trust rather than a person.Yes

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

42740 River Thorne Sq 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 75% of homes in Loudoun County
  • Among the largest lots in Ashburn 20147

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
$344K$1.5M

This home is worth more than 28% 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$615,954
CheaperTypical $753,899Pricier

Pricier than 28% of homes nearby

Lot size11.41 ac
SmallerTypical 0.1 acBigger

Bigger than almost all homes nearby

How 42740 River Thorne Sq ranks against every home in each area.
MeasureThis homeAshburn 20147Loudoun County
Estimated valuepricier than$615,95428% of homes25% of homes
Lot sizebigger than11.41 acalmost all homes98% of homes

About 42740 River Thorne Sq

How much is 42740 River Thorne Sq, Ashburn, VA worth?

The TopHap Estimate for 42740 River Thorne Sq, Ashburn, VA is $615,954 as of Jul 14, 2026. The likely range is $539,587 to $692,321. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 42740 River Thorne Sq, Ashburn, VA last sell?

42740 River Thorne Sq, Ashburn, VA last sold on Jul 27, 2026 for $550,000, according to the county's recorded deed. TopHap holds 11 recorded sales for this parcel.

What schools serve 42740 River Thorne Sq, Ashburn, VA?

42740 River Thorne Sq, Ashburn, VA is assigned to Stone Bridge High School (high), rated A+; Belmont Station Elementary School (elementary), rated A; Trailside Middle School (middle), rated A+. All sit in Loudoun County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 42740 River Thorne Sq, Ashburn, VA compare to other homes in Ashburn 20147?

Among the 20,084 homes in Ashburn 20147, it is worth more than 28% of them ($615,954 against a typical $753,899) and its lot is bigger than almost all of them (11.41 ac against a typical 0.1 ac). Measured against all of Loudoun County, it is worth more than 25% 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 42740 River Thorne Sq, Ashburn, VA?

The 2025 property tax bill for 42740 River Thorne Sq, Ashburn, VA was $198,191. The county assessed it at $24,620,000.

Closest homes

More homes in Ashburn 20147

Assigned schools

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