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Single Family ResidenceResidential
$703,781$245 / 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 Sep 24, 2026
Last sold for $615,000 on Sep 6, 2023

12171 FORMBY ST

BRISTOW, VA 20136
4
Beds
3.5
Baths
2,876 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.
0.12 ac
Lot SizeThe size of the land the home sits on, from county records.
2001
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
9
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$704K
$665K low$743K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$615,000 · Sep 6, 2023

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,931 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$653,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$197,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$455,800
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$596,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$653,000

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.37
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
7
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.
72
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
29
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.

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
StyleThe architectural style of the home, such as ranch or colonial.Bi-Level
CountyPRINCE WILLIAM
Lot (acres)The size of the land the home sits on, from county records.0.12
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(6)

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
Chris Yung Elementary SchoolB
Elementary · Grades PK–5 · 1.0 mi
H
Gainesville High SchoolA-
High · Grades 9–12 · 2.3 mi
M
Gainesville Middle SchoolA
Middle · Grades 6–8 · 2.4 mi

District: Prince William County Public Schools

Neighborhood · ZIP 20136These 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.24
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.74
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.44

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.99%
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.1.6%
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.31,962
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,117 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$162,097
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$189,319
Average tempThe average temperature here across a full year.56°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

12171 Formby 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 more than 67% of homes in Prince William County
  • Costs less per square foot than 86% of homes in Prince William County
  • Bigger than 79% of homes in Prince William County
  • Has a smaller lot than 66% of homes in Bristow 20136

What homes are worth in Bristow 20136

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

This home
$476K$1M

This home is worth more than 40% of homes in Bristow 20136.

How it measures up in Bristow 20136

The dot is this home. The mark in the middle is the typical home in Bristow 20136.

Estimated value$703,781
CheaperTypical $758,936Pricier

Pricier than 40% of homes nearby

Price per ft²$245
CheaperTypical $299Pricier

Pricier than 16% of homes nearby

Living area2,876 ft²
SmallerTypical 2,460 ft²Bigger

Bigger than 68% of homes nearby

Lot size0.12 ac
SmallerTypical 0.19 acBigger

Bigger than 34% of homes nearby

Year built2001
OlderTypical 2003Newer

Newer than 40% of homes nearby

How 12171 Formby St ranks against every home in each area.
MeasureThis homeBristow 20136Prince William County
Estimated valuepricier than$703,78140% of homes67% of homes
Price per ft²pricier than$24516% of homes14% of homes
Living areabigger than2,876 ft²68% of homes79% of homes
Lot sizebigger than0.12 ac34% of homes36% of homes
Year builtnewer than200140% of homes64% of homes

About 12171 Formby St

How much is 12171 Formby St, Bristow, VA worth?

The TopHap Estimate for 12171 Formby St, Bristow, VA is $703,781 as of Sep 24, 2026. The likely range is $664,750 to $742,812. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 12171 Formby St, Bristow, VA last sell?

12171 Formby St, Bristow, VA last sold on Sep 6, 2023 for $615,000, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 12171 Formby St, Bristow, VA?

12171 Formby St, Bristow, VA has 4 bedrooms, 3.5 bathrooms, 2,876 square feet of living space and a 0.12-acre lot.

When was 12171 Formby St, Bristow, VA built?

12171 Formby St, Bristow, VA was built in 2001, making it 25 years old. It is a bi-level home. The building has 2 stories.

What schools serve 12171 Formby St, Bristow, VA?

12171 Formby St, Bristow, VA is assigned to Chris Yung Elementary School (elementary), rated B; Gainesville High School (high), rated A-; Gainesville Middle School (middle), rated A. All sit in Prince William County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 12171 Formby St, Bristow, VA compare to other homes in Bristow 20136?

Among the 9,409 homes in Bristow 20136, it is worth more than 40% of them ($703,781 against a typical $758,936), its price per square foot is higher than 16% of them ($245 against a typical $299), it is bigger than 68% of them (2,876 ft² against a typical 2,460 ft²), its lot is bigger than 34% of them (0.12 ac against a typical 0.19 ac) and it is newer than 40% of them (2001 against a typical 2003). Measured against all of Prince William County, it is worth more than 67% 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 12171 Formby St, Bristow, VA?

The 2024 property tax bill for 12171 Formby St, Bristow, VA was $5,931. The county assessed it at $653,000.

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