Skip to content
Skip to content
TopHapOpen in map
TownhouseResidential
$802,929$301 / 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 94How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $800,000 on Jun 8, 2026

42321 ALDER FOREST TER

STERLING, VA 20166
4
Beds
3.5
Baths
2,668 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.
3,049 ft²
Lot SizeThe size of the land the home sits on, from county records.
2020
Year BuiltThe year the home was originally built, according to county records.
3
StoriesHow many floors the home has above ground.

Valuation

$803K
$753K low$853K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$800,000 · Jun 8, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,978 (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.$742,670 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$223,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$519,170
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$702,910
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$742,670

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.51
43
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
19
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.
84
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.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.10 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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.Townhouse
StyleThe architectural style of the home, such as ranch or colonial.Townhouse
CountyLOUDOUN
Lot (acres)The size of the land the home sits on, from county records.0.07
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

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.

M
Mercer Middle SchoolA-
Middle · Grades 6–8 · 1.1 mi
E
Elaine E. Thompson Elementary SchoolA
Elementary · Grades PK–5 · 1.1 mi
H
John Champe High SchoolA
High · Grades 9–12 · 1.6 mi

District: Loudoun County Public Schools

Neighborhood · ZIP 20166These 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.85
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.80
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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.1%
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.18,322
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.838 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$133,145
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$163,624
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%

Owner Tools

Do you own this home?
Claim this home

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

42321 Alder Forest Ter 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 87% of homes in Sterling 20166
  • Costs less per square foot than 73% of homes in Loudoun County
  • Bigger than 80% of homes in Sterling 20166
  • Has a smaller lot than 74% of homes in Loudoun County
  • Newer than 94% of homes in Loudoun County

What homes are worth in Sterling 20166

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

This home
$384K$1.5M

This home is worth more than 87% of homes in Sterling 20166.

How it measures up in Sterling 20166

The dot is this home. The mark in the middle is the typical home in Sterling 20166.

Estimated value$802,929
CheaperTypical $602,533Pricier

Pricier than 87% of homes nearby

Price per ft²$301
CheaperTypical $299Pricier

Pricier than 52% of homes nearby

Living area2,668 ft²
SmallerTypical 2,110 ft²Bigger

Bigger than 80% of homes nearby

Lot size3,049 ft²
SmallerTypical 2,178 ft²Bigger

Bigger than 71% of homes nearby

Year built2020
OlderTypical 2004Newer

Newer than 86% of homes nearby

How 42321 Alder Forest Ter ranks against every home in each area.
MeasureThis homeSterling 20166Loudoun County
Estimated valuepricier than$802,92987% of homes51% of homes
Price per ft²pricier than$30152% of homes27% of homes
Living areabigger than2,668 ft²80% of homes57% of homes
Lot sizebigger than3,049 ft²71% of homes26% of homes
Year builtnewer than202086% of homes94% of homes

About 42321 Alder Forest Ter

How much is 42321 Alder Forest Ter, Sterling, VA worth?

The TopHap Estimate for 42321 Alder Forest Ter, Sterling, VA is $802,929 as of Aug 30, 2026. The likely range is $752,549 to $853,309. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 42321 Alder Forest Ter, Sterling, VA last sell?

42321 Alder Forest Ter, Sterling, VA last sold on Jun 8, 2026 for $800,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 42321 Alder Forest Ter, Sterling, VA?

42321 Alder Forest Ter, Sterling, VA has 4 bedrooms, 3.5 bathrooms, 2,668 square feet of living space and a 0.07-acre lot.

When was 42321 Alder Forest Ter, Sterling, VA built?

42321 Alder Forest Ter, Sterling, VA was built in 2020, making it 6 years old. It is a townhouse home. The building has 3 stories.

What schools serve 42321 Alder Forest Ter, Sterling, VA?

42321 Alder Forest Ter, Sterling, VA is assigned to Mercer Middle School (middle), rated A-; Elaine E. Thompson Elementary School (elementary), rated A; John Champe 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 42321 Alder Forest Ter, Sterling, VA compare to other homes in Sterling 20166?

Among the 3,907 homes in Sterling 20166, it is worth more than 87% of them ($802,929 against a typical $602,533), its price per square foot is higher than 52% of them ($301 against a typical $299), it is bigger than 80% of them (2,668 ft² against a typical 2,110 ft²), its lot is bigger than 71% of them (3,049 ft² against a typical 2,178 ft²) and it is newer than 86% of them (2020 against a typical 2004). Measured against all of Loudoun County, it is worth more than 51% 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 42321 Alder Forest Ter, Sterling, VA?

The 2025 property tax bill for 42321 Alder Forest Ter, Sterling, VA was $5,978. The county assessed it at $742,670.

More homes on Alder Forest Ter

Closest homes

More homes in Sterling 20166

Assigned schools

Explore the area

See this home in context

Open 42321 Alder Forest Ter on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map