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Single Family ResidenceResidential
$1,010,189$242 / 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 Sep 24, 2026
Last sold for $984,000 on Oct 21, 2024

42584 SWALLOWTAIL WAY

BRAMBLETON, VA 20148
4
Beds
3.5
Baths
4,176 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.
0.16 ac
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

$1M
$974K low$1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$984,000 · Oct 21, 2024

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,977 (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.$990,920 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$347,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$643,620
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,003,170
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$990,920

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.40
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
8
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.
83
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.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Colonial
CountyLOUDOUN
Lot (acres)The size of the land the home sits on, from county records.0.16
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
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.DeckPatio · 376 ft²Porch · 108 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.

E
Legacy Elementary SchoolA+
Elementary · Grades PK–5 · 0.4 mi
M
Brambleton Middle SchoolA
Middle · Grades 6–8 · 1.3 mi
H
Independence High SchoolA
High · Grades 9–12 · 1.4 mi

District: Loudoun County Public Schools

Neighborhood · ZIP 20148These 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.20
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.81
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.38

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.40%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.5%
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.56,606
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,496 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$194,877
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$227,317
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

42584 Swallowtail Way 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 70% of homes in Loudoun County
  • Costs less per square foot than 87% of homes in Ashburn 20148
  • Bigger than 78% of homes in Loudoun County
  • Older than 86% of homes in Ashburn 20148

What homes are worth in Ashburn 20148

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

This home
$362K$1.9M

This home is worth more than 62% of homes in Ashburn 20148.

How it measures up in Ashburn 20148

The dot is this home. The mark in the middle is the typical home in Ashburn 20148.

Estimated value$1,010,189
CheaperTypical $882,744Pricier

Pricier than 62% of homes nearby

Price per ft²$242
CheaperTypical $285Pricier

Pricier than 13% of homes nearby

Living area4,176 ft²
SmallerTypical 3,074 ft²Bigger

Bigger than 73% of homes nearby

Lot size0.16 ac
SmallerTypical 0.11 acBigger

Bigger than 60% of homes nearby

Year built2003
OlderTypical 2013Newer

Newer than 14% of homes nearby

How 42584 Swallowtail Way ranks against every home in each area.
MeasureThis homeAshburn 20148Loudoun County
Estimated valuepricier than$1,010,18962% of homes70% of homes
Price per ft²pricier than$24213% of homes13% of homes
Living areabigger than4,176 ft²73% of homes78% of homes
Lot sizebigger than0.16 ac60% of homes42% of homes
Year builtnewer than200314% of homes53% of homes

About 42584 Swallowtail Way

How much is 42584 Swallowtail Way, Brambleton, VA worth?

The TopHap Estimate for 42584 Swallowtail Way, Brambleton, VA is $1,010,189 as of Sep 24, 2026. The likely range is $973,573 to $1,046,805. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 42584 Swallowtail Way, Brambleton, VA last sell?

42584 Swallowtail Way, Brambleton, VA last sold on Oct 21, 2024 for $984,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 42584 Swallowtail Way, Brambleton, VA?

42584 Swallowtail Way, Brambleton, VA has 4 bedrooms, 3.5 bathrooms, 4,176 square feet of living space and a 0.16-acre lot.

When was 42584 Swallowtail Way, Brambleton, VA built?

42584 Swallowtail Way, Brambleton, VA was built in 2003, making it 23 years old. It is a colonial home. The building has 2 stories.

What schools serve 42584 Swallowtail Way, Brambleton, VA?

42584 Swallowtail Way, Brambleton, VA is assigned to Legacy Elementary School (elementary), rated A+; Brambleton Middle School (middle), rated A; Independence 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 42584 Swallowtail Way, Brambleton, VA compare to other homes in Ashburn 20148?

Among the 20,911 homes in Ashburn 20148, it is worth more than 62% of them ($1,010,189 against a typical $882,744), its price per square foot is higher than 13% of them ($242 against a typical $285), it is bigger than 73% of them (4,176 ft² against a typical 3,074 ft²), its lot is bigger than 60% of them (0.16 ac against a typical 0.11 ac) and it is newer than 14% of them (2003 against a typical 2013). Measured against all of Loudoun County, it is worth more than 70% 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 42584 Swallowtail Way, Brambleton, VA?

The 2026 property tax bill for 42584 Swallowtail Way, Brambleton, VA was $7,977. The county assessed it at $990,920.

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