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CondominiumResidential
$345,874$344 / 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 93How 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 $98,840 on Dec 15, 1998

645 CONSTELLATION SQ SE UNIT C

LEESBURG, VA 20175
Building report
2
Beds
2
Baths
1,004 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.
1998
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$346K
$323K low$369K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$98,840 · Dec 15, 1998

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,446 (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.$303,810 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$100,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$203,810
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$281,760
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$303,810

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.
79
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.Condominium
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
CountyLoudoun
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.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.Patio · 45 ft²

Transaction History(1)

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
Frederick Douglass Elementary SchoolC+
Elementary · Grades PK–5 · 0.6 mi
M
J. Lupton Simpson Middle SchoolB-
Middle · Grades 6–8 · 0.9 mi
H
Loudoun County High SchoolA-
High · Grades 9–12 · 1.4 mi

District: Loudoun County Public Schools

Neighborhood · ZIP 20175These 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.97
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.78
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.39

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.39%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.3%
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.43,938
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.690 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$170,456
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$198,119
Average tempThe average temperature here across a full year.54°F
Annual precipHow much rain and melted snow falls here in a typical year.43 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

645 Constellation Sq Se Unit C 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 97% of homes in Loudoun County
  • Costs more per square foot than 81% of homes in Loudoun County
  • Smaller than 97% of homes in Loudoun County

What homes are worth in Leesburg 20175

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

This home
$265K$2.2M

This home is worth more than 7% of homes in Leesburg 20175.

How it measures up in Leesburg 20175

The dot is this home. The mark in the middle is the typical home in Leesburg 20175.

Estimated value$345,874
CheaperTypical $852,172Pricier

Pricier than 7% of homes nearby

Price per ft²$344
CheaperTypical $301Pricier

Pricier than 72% of homes nearby

Living area1,004 ft²
SmallerTypical 2,690 ft²Bigger

Bigger than 8% of homes nearby

Year built1998
OlderTypical 1999Newer

Newer than 48% of homes nearby

How 645 Constellation Sq Se Unit C ranks against every home in each area.
MeasureThis homeLeesburgLeesburg 20175Loudoun County
Estimated valuepricier than$345,8749% of homes7% of homes3% of homes
Price per ft²pricier than$34476% of homes72% of homes81% of homes
Living areabigger than1,004 ft²8% of homes8% of homes3% of homes
Year builtnewer than199856% of homes48% of homes37% of homes

About 645 Constellation Sq Se Unit C

How much is 645 Constellation Sq Se Unit C, Leesburg, VA worth?

The TopHap Estimate for 645 Constellation Sq Se Unit C, Leesburg, VA is $345,874 as of Sep 24, 2026. The likely range is $322,925 to $368,823. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 645 Constellation Sq Se Unit C, Leesburg, VA last sell?

645 Constellation Sq Se Unit C, Leesburg, VA last sold on Dec 15, 1998 for $98,840, according to the county's recorded deed.

How big is 645 Constellation Sq Se Unit C, Leesburg, VA?

645 Constellation Sq Se Unit C, Leesburg, VA has 2 bedrooms, 2 bathrooms and 1,004 square feet of living space.

When was 645 Constellation Sq Se Unit C, Leesburg, VA built?

645 Constellation Sq Se Unit C, Leesburg, VA was built in 1998, making it 28 years old. It is a condo/apartment home. The building has 1 story.

What schools serve 645 Constellation Sq Se Unit C, Leesburg, VA?

645 Constellation Sq Se Unit C, Leesburg, VA is assigned to Frederick Douglass Elementary School (elementary), rated C+; J. Lupton Simpson Middle School (middle), rated B-; Loudoun County 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 645 Constellation Sq Se Unit C, Leesburg, VA compare to other homes in Leesburg 20175?

Among the 11,339 homes in Leesburg 20175, it is worth more than 7% of them ($345,874 against a typical $852,172), its price per square foot is higher than 72% of them ($344 against a typical $301), it is bigger than 8% of them (1,004 ft² against a typical 2,690 ft²) and it is newer than 48% of them (1998 against a typical 1999). Measured against all of Loudoun County, it is worth more than 3% 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 645 Constellation Sq Se Unit C, Leesburg, VA?

The 2025 property tax bill for 645 Constellation Sq Se Unit C, Leesburg, VA was $2,446. The county assessed it at $303,810.

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