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Single Family ResidenceResidential
$449,398$181 / 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 $157,000 on Aug 7, 2002

1421 S KEYSTONE AVE

UPPER DARBY, PA 19082
3
Beds
3.5
Baths
2,480 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.
0.23 ac
Lot SizeThe size of the land the home sits on, from county records.
1929
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
8
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$449K
$422K low$476K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$157,000 · Aug 7, 2002

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,273 (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.$186,260 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$47,850
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$138,410
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$186,260
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$186,260

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyDELAWARE
Lot (acres)The size of the land the home sits on, from county records.0.23
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
HeatingThe type of heating system in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
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.

H
Upper Darby High SchoolD+
High · Grades 9–12 · 0.5 mi
M
Drexel Hill Middle SchoolD+
Middle · Grades 6–8 · 1.1 mi
E
Hillcrest Elementary SchoolC
Elementary · Grades KG–5 · 1.2 mi

District: Upper Darby School District

Neighborhood · ZIP 19082These 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.115
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.99
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.78

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.19%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.17%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.41,135
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.16,040 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$59,070
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$74,967
Average tempThe average temperature here across a full year.55°F
Annual precipHow much rain and melted snow falls here in a typical year.46 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.56%

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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

1421 S Keystone Ave 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.

  • Among the most valuable homes in Upper Darby 19082
  • Costs more per square foot than 81% of homes in Upper Darby 19082
  • Bigger than 97% of homes in Upper Darby 19082
  • Has a bigger lot than 97% of homes in Upper Darby 19082
  • Older than 80% of homes in Delaware County

What homes are worth in Upper Darby 19082

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

This home
$58K$422K

This home is worth more than almost all homes in Upper Darby 19082.

How it measures up in Upper Darby 19082

The dot is this home. The mark in the middle is the typical home in Upper Darby 19082.

Estimated value$449,398
CheaperTypical $186,349Pricier

Pricier than almost all homes nearby

Price per ft²$181
CheaperTypical $152Pricier

Pricier than 81% of homes nearby

Living area2,480 ft²
SmallerTypical 1,282 ft²Bigger

Bigger than 97% of homes nearby

Lot size0.23 ac
SmallerTypical 1,786 ft²Bigger

Bigger than 97% of homes nearby

Year built1929
OlderTypical 1929Newer

Newer than 52% of homes nearby

How 1421 S Keystone Ave ranks against every home in each area.
MeasureThis homeUpper Darby 19082Delaware County
Estimated valuepricier than$449,398almost all homes53% of homes
Price per ft²pricier than$18181% of homes25% of homes
Living areabigger than2,480 ft²97% of homes80% of homes
Lot sizebigger than0.23 ac97% of homes68% of homes
Year builtnewer than192952% of homes20% of homes

About 1421 S Keystone Ave

How much is 1421 S Keystone Ave, Upper Darby, PA worth?

The TopHap Estimate for 1421 S Keystone Ave, Upper Darby, PA is $449,398 as of Sep 24, 2026. The likely range is $422,298 to $476,497. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 1421 S Keystone Ave, Upper Darby, PA last sell?

1421 S Keystone Ave, Upper Darby, PA last sold on Aug 7, 2002 for $157,000, according to the county's recorded deed.

How big is 1421 S Keystone Ave, Upper Darby, PA?

1421 S Keystone Ave, Upper Darby, PA has 3 bedrooms, 3.5 bathrooms, 2,480 square feet of living space and a 0.23-acre lot.

When was 1421 S Keystone Ave, Upper Darby, PA built?

1421 S Keystone Ave, Upper Darby, PA was built in 1929, making it 97 years old. The building has 2 stories.

What schools serve 1421 S Keystone Ave, Upper Darby, PA?

1421 S Keystone Ave, Upper Darby, PA is assigned to Upper Darby High School (high), rated D+; Drexel Hill Middle School (middle), rated D+; Hillcrest Elementary School (elementary), rated C. All sit in Upper Darby School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 1421 S Keystone Ave, Upper Darby, PA compare to other homes in Upper Darby 19082?

Among the 11,486 homes in Upper Darby 19082, it is worth more than almost all of them ($449,398 against a typical $186,349), its price per square foot is higher than 81% of them ($181 against a typical $152), it is bigger than 97% of them (2,480 ft² against a typical 1,282 ft²), its lot is bigger than 97% of them (0.23 ac against a typical 1,786 ft²) and it is newer than 52% of them (1929 against a typical 1929). Measured against all of Delaware County, it is worth more than 53% 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 1421 S Keystone Ave, Upper Darby, PA?

The 2026 property tax bill for 1421 S Keystone Ave, Upper Darby, PA was $8,273. The county assessed it at $186,260.

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