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Single Family ResidenceResidential
$815,027$501 / 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 $579,000 on Jun 19, 2017

3109 MOSBY ST

ALEXANDRIA, VA 22305
3
Beds
2
Baths
1,628 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.
2,962 ft²
Lot SizeThe size of the land the home sits on, from county records.
1955
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$815K
$780K low$850K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$579,000 · Jun 19, 2017

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,825 (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.$721,151 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$429,758
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$291,393
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$721,151
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$721,151

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.Townhouse
CountyALEXANDRIA CITY
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.1982
Lot (acres)The size of the land the home sits on, from county records.0.07
ConstructionThe main material the home's frame and walls are built from.Masonry/Concrete Masonry Units (Cmus)
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
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
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 32 ft²Porch · 132 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
Mount Vernon Elementary SchoolD+
Elementary · Grades KG–5 · 0.5 mi
H
Alexandria City High SchoolD
High · Grades 9–12 · 1.3 mi
M
George Washington Middle SchoolC+
Middle · Grades 6–8 · 1.4 mi

District: Alexandria City Public Schools

Neighborhood · ZIP 22305These 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.101
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.94
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.34

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.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.15%
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.18,897
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.13,519 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$110,742
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$145,092
Average tempThe average temperature here across a full year.56°F
Annual precipHow much rain and melted snow falls here in a typical year.41 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

3109 Mosby St 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 65% of homes in Potomac West
  • Costs less per square foot than 80% of homes in Potomac West
  • Newer than 75% of homes in Potomac West

What homes are worth in Alexandria 22305

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

This home
$255K$1.8M

This home is worth more than 47% of homes in Alexandria 22305.

How it measures up in Alexandria 22305

The dot is this home. The mark in the middle is the typical home in Alexandria 22305.

Estimated value$815,027
CheaperTypical $828,869Pricier

Pricier than 47% of homes nearby

Price per ft²$501
CheaperTypical $527Pricier

Pricier than 38% of homes nearby

Living area1,628 ft²
SmallerTypical 1,606 ft²Bigger

Bigger than 51% of homes nearby

Lot size2,962 ft²
SmallerTypical 3,006 ft²Bigger

Bigger than 49% of homes nearby

Year built1955
OlderTypical 1950Newer

Newer than 69% of homes nearby

How 3109 Mosby St ranks against every home in each area.
MeasureThis homePotomac WestAlexandria 22305Alexandria city County
Estimated valuepricier than$815,02735% of homes47% of homes59% of homes
Price per ft²pricier than$50120% of homes38% of homes59% of homes
Living areabigger than1,628 ft²56% of homes51% of homes59% of homes
Lot sizebigger than2,962 ft²47% of homes49% of homes60% of homes
Year builtnewer than195575% of homes69% of homes33% of homes

About 3109 Mosby St

How much is 3109 Mosby St, Alexandria, VA worth?

The TopHap Estimate for 3109 Mosby St, Alexandria, VA is $815,027 as of Sep 24, 2026. The likely range is $780,175 to $849,879. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 3109 Mosby St, Alexandria, VA last sell?

3109 Mosby St, Alexandria, VA last sold on Jun 19, 2017 for $579,000, according to the county's recorded deed.

How big is 3109 Mosby St, Alexandria, VA?

3109 Mosby St, Alexandria, VA has 3 bedrooms, 2 bathrooms, 1,628 square feet of living space and a 0.07-acre lot.

When was 3109 Mosby St, Alexandria, VA built?

3109 Mosby St, Alexandria, VA was built in 1955, making it 71 years old. It is a townhouse home. The building has 2 stories.

What schools serve 3109 Mosby St, Alexandria, VA?

3109 Mosby St, Alexandria, VA is assigned to Mount Vernon Elementary School (elementary), rated D+; Alexandria City High School (high), rated D; George Washington Middle School (middle), rated C+. All sit in Alexandria City Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 3109 Mosby St, Alexandria, VA compare to other homes in Alexandria 22305?

Among the 3,417 homes in Alexandria 22305, it is worth more than 47% of them ($815,027 against a typical $828,869), its price per square foot is higher than 38% of them ($501 against a typical $527), it is bigger than 51% of them (1,628 ft² against a typical 1,606 ft²), its lot is bigger than 49% of them (2,962 ft² against a typical 3,006 ft²) and it is newer than 69% of them (1955 against a typical 1950). Measured against all of Alexandria city County, it is worth more than 59% 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 3109 Mosby St, Alexandria, VA?

The 2025 property tax bill for 3109 Mosby St, Alexandria, VA was $8,825. The county assessed it at $721,151.

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