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Single Family ResidenceResidential
$293,794$212 / 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 Jul 14, 2026
Last sold for $210,000 on Dec 28, 2012

21 KEYSTONE PL

HOUSTON, PA 15342
3
Beds
2.5
Baths
1,384 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.
0.18 ac
Lot SizeThe size of the land the home sits on, from county records.
1982
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.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$294K
$281K low$307K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$210,000 · Dec 28, 2012

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,433 (2026)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$187,100 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$34,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$152,500
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$187,100
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$187,100

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.39
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
4
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
73
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
88
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
31
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
CountyWASHINGTON
Lot (acres)The size of the land the home sits on, from county records.0.18
ConstructionThe main material the home's frame and walls are built from.Brick
HeatingThe type of heating system in the home.Central
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, Basement
PoolWhether the property has a pool, and what kind, such as in-ground.No

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.

M
Chartiers-Houston Jr. / Sr. High SchoolB+
Middle · Grades 7–12 · 0.6 mi
E
Allison Park Elementary SchoolB-
Elementary · Grades KG–6 · 1.0 mi

District: Chartiers-Houston School District

Neighborhood · ZIP 15342These 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.63
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.96
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.27

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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.26%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.7%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.4,572
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,399 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$90,341
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$116,938
Average tempThe average temperature here across a full year.51°F
Annual precipHow much rain and melted snow falls here in a typical year.39 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.45%

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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

21 Keystone Pl 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 66% of homes in Houston 15342
  • Costs more per square foot than 75% of homes in Washington County
  • Has a smaller lot than 70% of homes in Washington County
  • Newer than 73% of homes in Houston 15342

What homes are worth in Houston 15342

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

This home
$81K$573K

This home is worth more than 66% of homes in Houston 15342.

How it measures up in Houston 15342

The dot is this home. The mark in the middle is the typical home in Houston 15342.

Estimated value$293,794
CheaperTypical $249,421Pricier

Pricier than 66% of homes nearby

Price per ft²$212
CheaperTypical $175Pricier

Pricier than 74% of homes nearby

Living area1,384 ft²
SmallerTypical 1,390 ft²Bigger

Bigger than 49% of homes nearby

Lot size0.18 ac
SmallerTypical 0.25 acBigger

Bigger than 33% of homes nearby

Year built1982
OlderTypical 1959Newer

Newer than 73% of homes nearby

How 21 Keystone Pl ranks against every home in each area.
MeasureThis homeHouston 15342Washington County
Estimated valuepricier than$293,79466% of homes64% of homes
Price per ft²pricier than$21274% of homes75% of homes
Living areabigger than1,384 ft²49% of homes42% of homes
Lot sizebigger than0.18 ac33% of homes30% of homes
Year builtnewer than198273% of homes68% of homes

About 21 Keystone Pl

How much is 21 Keystone Pl, Houston, PA worth?

The TopHap Estimate for 21 Keystone Pl, Houston, PA is $293,794 as of Jul 14, 2026. The likely range is $280,779 to $306,809. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Keystone Pl, Houston, PA last sell?

21 Keystone Pl, Houston, PA last sold on Dec 28, 2012 for $210,000, according to the county's recorded deed.

How big is 21 Keystone Pl, Houston, PA?

21 Keystone Pl, Houston, PA has 3 bedrooms, 2.5 bathrooms, 1,384 square feet of living space and a 0.18-acre lot.

When was 21 Keystone Pl, Houston, PA built?

21 Keystone Pl, Houston, PA was built in 1982, making it 44 years old. The building has 1 story.

What schools serve 21 Keystone Pl, Houston, PA?

21 Keystone Pl, Houston, PA is assigned to Chartiers-Houston Jr. / Sr. High School (middle), rated B+; Allison Park Elementary School (elementary), rated B-. All sit in Chartiers-Houston School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Keystone Pl, Houston, PA compare to other homes in Houston 15342?

Among the 2,101 homes in Houston 15342, it is worth more than 66% of them ($293,794 against a typical $249,421), its price per square foot is higher than 74% of them ($212 against a typical $175), it is bigger than 49% of them (1,384 ft² against a typical 1,390 ft²), its lot is bigger than 33% of them (0.18 ac against a typical 0.25 ac) and it is newer than 73% of them (1982 against a typical 1959). Measured against all of Washington County, it is worth more than 64% 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 21 Keystone Pl, Houston, PA?

The 2026 property tax bill for 21 Keystone Pl, Houston, PA was $3,433. The county assessed it at $187,100.

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