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CondominiumResidential
$314,900$306 / 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 95How 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 $315,000 on Sep 22, 2026

2231 CASTLE ROCK SQ

RESTON, VA 20191
Building report
3
Beds
2
Baths
1,029 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.
2,609 ft²
Lot SizeThe size of the land the home sits on, from county records.
1974
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$315K
$301K low$329K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$315,000 · Sep 22, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,433 (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.$285,350 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$57,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$228,350
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$285,350
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$285,350

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
CountyFAIRFAX
Lot (acres)The size of the land the home sits on, from county records.0.06
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Yes
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
ViewThe type of view from the property, or another feature of the site that affects value.Buildable
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 60 ft²

Transaction History(5)

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
Terraset Elementary SchoolB+
Elementary · Grades PK–6 · 0.3 mi
H
South Lakes High SchoolC
High · Grades 9–12 · 0.5 mi
M
Hughes Middle SchoolA-
Middle · Grades 7–8 · 0.5 mi

District: Fairfax County Public Schools

Neighborhood · ZIP 20191These 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.82
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.40

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.36%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.0%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.30,650
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,674 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$138,723
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$166,233
Average tempThe average temperature here across a full year.55°F
Annual precipHow much rain and melted snow falls here in a typical year.44 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

2231 Castle Rock 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 96% of homes in Reston
  • Costs less per square foot than 96% of homes in Reston
  • Smaller than 90% of homes in Fairfax County
  • Has a smaller lot than 74% of homes in Fairfax County

What homes are worth in Reston 20191

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

This home
$260K$1.3M

This home is worth more than 9% of homes in Reston 20191.

How it measures up in Reston 20191

The dot is this home. The mark in the middle is the typical home in Reston 20191.

Estimated value$314,900
CheaperTypical $641,402Pricier

Pricier than 9% of homes nearby

Price per ft²$306
CheaperTypical $418Pricier

Pricier than 9% of homes nearby

Living area1,029 ft²
SmallerTypical 1,452 ft²Bigger

Bigger than 17% of homes nearby

Lot size2,609 ft²
SmallerTypical 2,875 ft²Bigger

Bigger than 46% of homes nearby

Year built1974
OlderTypical 1976Newer

Newer than 43% of homes nearby

How 2231 Castle Rock Sq ranks against every home in each area.
MeasureThis homeRestonReston 20191Fairfax County
Estimated valuepricier than$314,9004% of homes9% of homes5% of homes
Price per ft²pricier than$3064% of homes9% of homes8% of homes
Living areabigger than1,029 ft²14% of homes17% of homes10% of homes
Lot sizebigger than2,609 ft²49% of homes46% of homes26% of homes
Year builtnewer than197443% of homes43% of homes37% of homes

About 2231 Castle Rock Sq

How much is 2231 Castle Rock Sq, Reston, VA worth?

The TopHap Estimate for 2231 Castle Rock Sq, Reston, VA is $314,900 as of Sep 24, 2026. The likely range is $300,700 to $329,100. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 2231 Castle Rock Sq, Reston, VA last sell?

2231 Castle Rock Sq, Reston, VA last sold on Sep 22, 2026 for $315,000, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 2231 Castle Rock Sq, Reston, VA?

2231 Castle Rock Sq, Reston, VA has 3 bedrooms, 2 bathrooms, 1,029 square feet of living space and a 0.06-acre lot.

When was 2231 Castle Rock Sq, Reston, VA built?

2231 Castle Rock Sq, Reston, VA was built in 1974, making it 52 years old. The building has 1 story.

What schools serve 2231 Castle Rock Sq, Reston, VA?

2231 Castle Rock Sq, Reston, VA is assigned to Terraset Elementary School (elementary), rated B+; South Lakes High School (high), rated C; Hughes Middle School (middle), rated A-. All sit in Fairfax County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 2231 Castle Rock Sq, Reston, VA compare to other homes in Reston 20191?

Among the 10,548 homes in Reston 20191, it is worth more than 9% of them ($314,900 against a typical $641,402), its price per square foot is higher than 9% of them ($306 against a typical $418), it is bigger than 17% of them (1,029 ft² against a typical 1,452 ft²), its lot is bigger than 46% of them (2,609 ft² against a typical 2,875 ft²) and it is newer than 43% of them (1974 against a typical 1976). Measured against all of Fairfax County, it is worth more than 5% 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 2231 Castle Rock Sq, Reston, VA?

The 2025 property tax bill for 2231 Castle Rock Sq, Reston, VA was $3,433. The county assessed it at $285,350.

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