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Single Family ResidenceResidential
$1,681,963$438 / 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 91How 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 $1,572,000 on Jul 2, 2025

770 KEITHLEY DR

GREAT FALLS, VA 22066
3
Beds
5
Baths
3,836 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.
5.01 ac
Lot SizeThe size of the land the home sits on, from county records.
1976
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
5
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.7M
$1.5M low$1.8M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,572,000 · Jul 2, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$16,836 (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.$1,456,400 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$833,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$623,400
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,390,820
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,456,400

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.6 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
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
CountyFairfax
Lot (acres)The size of the land the home sits on, from county records.5.01
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.Heat Pump
CoolingThe type of cooling or air conditioning in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.Yes
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.BalconyDeck · 276 ft²Patio · 276 ft²Porch · 200 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
Forestville Elementary SchoolA+
Elementary · Grades PK–6 · 2.5 mi
M
Cooper Middle SchoolA+
Middle · Grades 7–8 · 9.9 mi
H
Langley High SchoolA+
High · Grades 9–12 · 11.2 mi

District: Fairfax County Public Schools

Neighborhood · ZIP 22066These 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.45
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 100.35

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.35%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.1.9%
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.18,712
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.706 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$238,115
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$308,878
Average tempThe average temperature here across a full year.55°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

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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

770 Keithley Dr 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 93% of homes in Fairfax County
  • Costs less per square foot than 70% of homes in Great Falls 22066
  • Bigger than 93% of homes in Fairfax County
  • Among the largest lots in Fairfax County
  • Older than 81% of homes in Great Falls 22066

What homes are worth in Great Falls 22066

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

This home
$830K$4.5M

This home is worth more than 49% of homes in Great Falls 22066.

How it measures up in Great Falls 22066

The dot is this home. The mark in the middle is the typical home in Great Falls 22066.

Estimated value$1,681,963
CheaperTypical $1,707,469Pricier

Pricier than 49% of homes nearby

Price per ft²$438
CheaperTypical $485Pricier

Pricier than 30% of homes nearby

Living area3,836 ft²
SmallerTypical 3,590 ft²Bigger

Bigger than 54% of homes nearby

Lot size5.01 ac
SmallerTypical 1.17 acBigger

Bigger than 93% of homes nearby

Year built1976
OlderTypical 1985Newer

Newer than 19% of homes nearby

How 770 Keithley Dr ranks against every home in each area.
MeasureThis homeGreat Falls 22066Fairfax County
Estimated valuepricier than$1,681,96349% of homes93% of homes
Price per ft²pricier than$43830% of homes54% of homes
Living areabigger than3,836 ft²54% of homes93% of homes
Lot sizebigger than5.01 ac93% of homesalmost all homes
Year builtnewer than197619% of homes39% of homes

About 770 Keithley Dr

How much is 770 Keithley Dr, Great Falls, VA worth?

The TopHap Estimate for 770 Keithley Dr, Great Falls, VA is $1,681,963 as of Sep 24, 2026. The likely range is $1,537,084 to $1,826,842. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 770 Keithley Dr, Great Falls, VA last sell?

770 Keithley Dr, Great Falls, VA last sold on Jul 2, 2025 for $1,572,000, according to the county's recorded deed.

How big is 770 Keithley Dr, Great Falls, VA?

770 Keithley Dr, Great Falls, VA has 3 bedrooms, 5 bathrooms, 3,836 square feet of living space and a 5.01-acre lot.

When was 770 Keithley Dr, Great Falls, VA built?

770 Keithley Dr, Great Falls, VA was built in 1976, making it 50 years old. The building has 1 story.

What schools serve 770 Keithley Dr, Great Falls, VA?

770 Keithley Dr, Great Falls, VA is assigned to Forestville Elementary School (elementary), rated A+; Cooper Middle School (middle), rated A+; Langley High School (high), rated A+. All sit in Fairfax County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 770 Keithley Dr, Great Falls, VA compare to other homes in Great Falls 22066?

Among the 6,207 homes in Great Falls 22066, it is worth more than 49% of them ($1,681,963 against a typical $1,707,469), its price per square foot is higher than 30% of them ($438 against a typical $485), it is bigger than 54% of them (3,836 ft² against a typical 3,590 ft²), its lot is bigger than 93% of them (5.01 ac against a typical 1.17 ac) and it is newer than 19% of them (1976 against a typical 1985). Measured against all of Fairfax County, it is worth more than 93% 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 770 Keithley Dr, Great Falls, VA?

The 2025 property tax bill for 770 Keithley Dr, Great Falls, VA was $16,836. The county assessed it at $1,456,400.

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