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Single Family ResidenceResidential
$2,753,070$459 / 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 86How 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

18423 ROUND TOP LN

ROUND HILL, VA 20141
4 / 1
Baths
5,994 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.
23.48 ac
Lot SizeThe size of the land the home sits on, from county records.
1990
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$2.8M
$2.4M low$3.1M high
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.$2,253,070
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$1,802,456
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.18%
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.$500,000
MOVEMENT MORTGAGE · recorded Sep 18, 2024

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$12,928 (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.$1,606,010 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$299,830
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$1,306,180
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,577,630
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,825,680

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.
29
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
77
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
81
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
16
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
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.1994
Lot (acres)The size of the land the home sits on, from county records.23.48
ConstructionThe main material the home's frame and walls are built from.Wood Frame
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Concrete
RoofThe main material covering the roof, such as asphalt shingle or tile.Metal
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, Detached
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 · 600 ft²

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Round Hill Elementary SchoolA
Elementary · Grades PK–5 · 2.8 mi
H
Woodgrove High SchoolA
High · Grades 9–12 · 4.5 mi
M
Harmony Middle SchoolA-
Middle · Grades 6–8 · 6.0 mi

District: Loudoun County Public Schools

Neighborhood · ZIP 20141These 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.74
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.76
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.44

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.40%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.1%
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.7,390
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.267 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$197,779
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$209,024
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.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

18423 Round Top Ln 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.

  • Among the most valuable homes in Loudoun County
  • Costs more per square foot than 92% of homes in Loudoun County
  • Among the largest homes in Round Hill 20141
  • Among the largest lots in Loudoun County
  • Older than 79% of homes in Loudoun County

What homes are worth in Round Hill 20141

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

This home
$490K$2.2M

This home is worth more than almost all homes in Round Hill 20141.

How it measures up in Round Hill 20141

The dot is this home. The mark in the middle is the typical home in Round Hill 20141.

Estimated value$2,753,070
CheaperTypical $876,324Pricier

Pricier than almost all homes nearby

Price per ft²$459
CheaperTypical $340Pricier

Pricier than 86% of homes nearby

Living area5,994 ft²
SmallerTypical 2,647 ft²Bigger

Bigger than almost all homes nearby

Lot size23.48 ac
SmallerTypical 0.47 acBigger

Bigger than 97% of homes nearby

Year built1990
OlderTypical 2002Newer

Newer than 22% of homes nearby

How 18423 Round Top Ln ranks against every home in each area.
MeasureThis homeRound Hill 20141Loudoun County
Estimated valuepricier than$2,753,070almost all homesalmost all homes
Price per ft²pricier than$45986% of homes92% of homes
Living areabigger than5,994 ft²almost all homesalmost all homes
Lot sizebigger than23.48 ac97% of homesalmost all homes
Year builtnewer than199022% of homes21% of homes

About 18423 Round Top Ln

How much is 18423 Round Top Ln, Round Hill, VA worth?

The TopHap Estimate for 18423 Round Top Ln, Round Hill, VA is $2,753,070 as of Jul 14, 2026. The likely range is $2,368,027 to $3,138,113. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 18423 Round Top Ln, Round Hill, VA?

18423 Round Top Ln, Round Hill, VA has 4 bathrooms, 5,994 square feet of living space and a 23.48-acre lot.

When was 18423 Round Top Ln, Round Hill, VA built?

18423 Round Top Ln, Round Hill, VA was built in 1990, making it 36 years old. It is a colonial home. The building has 2 stories.

What schools serve 18423 Round Top Ln, Round Hill, VA?

18423 Round Top Ln, Round Hill, VA is assigned to Round Hill Elementary School (elementary), rated A; Woodgrove High School (high), rated A; Harmony 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 18423 Round Top Ln, Round Hill, VA compare to other homes in Round Hill 20141?

Among the 2,789 homes in Round Hill 20141, it is worth more than almost all of them ($2,753,070 against a typical $876,324), its price per square foot is higher than 86% of them ($459 against a typical $340), it is bigger than almost all of them (5,994 ft² against a typical 2,647 ft²), its lot is bigger than 97% of them (23.48 ac against a typical 0.47 ac) and it is newer than 22% of them (1990 against a typical 2002). Measured against all of Loudoun County, it is worth more than almost all 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 18423 Round Top Ln, Round Hill, VA?

The 2025 property tax bill for 18423 Round Top Ln, Round Hill, VA was $12,928. The county assessed it at $1,606,010.

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