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Single Family ResidenceResidential
$509,714$283 / 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 92How 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 $297,500 on May 30, 2018

331 UNION AVE

SWARTHMORE, PA 19081
3
Beds
1
Baths
1,798 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.
0.37 ac
Lot SizeThe size of the land the home sits on, from county records.
1928
Year BuiltThe year the home was originally built, according to county records.
2
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.

Valuation

$510K
$470K low$550K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$297,500 · May 30, 2018

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$12,552 (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.$321,520 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$122,360
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$199,160
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$321,520
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$321,520

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.0.37
HeatingThe type of heating system in the home.Central
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.

E
Swarthmore-rutledge SchoolA+
Elementary · Grades KG–5 · 0.6 mi
M
Strath Haven Middle SchoolA
Middle · Grades 6–8 · 1.4 mi
H
Strath Haven High SchoolA+
High · Grades 9–12 · 1.4 mi

District: Wallingford-Swarthmore School District

Neighborhood · ZIP 19081These 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.60
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.102
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.76

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.29%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.0%
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.11,528
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.5,245 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$126,187
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$160,591
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

331 Union 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.

  • Worth less than 71% of homes in Swarthmore
  • Costs more per square foot than 69% of homes in Delaware County
  • Smaller than 68% of homes in Swarthmore
  • Has a bigger lot than 81% of homes in Swarthmore 19081
  • Older than 80% of homes in Delaware County

What homes are worth in Swarthmore 19081

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

This home
$154K$1.4M

This home is worth more than 43% of homes in Swarthmore 19081.

How it measures up in Swarthmore 19081

The dot is this home. The mark in the middle is the typical home in Swarthmore 19081.

Estimated value$509,714
CheaperTypical $554,175Pricier

Pricier than 43% of homes nearby

Price per ft²$283
CheaperTypical $276Pricier

Pricier than 53% of homes nearby

Living area1,798 ft²
SmallerTypical 1,800 ft²Bigger

Bigger than 49% of homes nearby

Lot size0.37 ac
SmallerTypical 0.22 acBigger

Bigger than 81% of homes nearby

Year built1928
OlderTypical 1952Newer

Newer than 24% of homes nearby

How 331 Union Ave ranks against every home in each area.
MeasureThis homeSwarthmoreSwarthmore 19081Delaware County
Estimated valuepricier than$509,71429% of homes43% of homes61% of homes
Price per ft²pricier than$28337% of homes53% of homes69% of homes
Living areabigger than1,798 ft²32% of homes49% of homes60% of homes
Lot sizebigger than0.37 ac72% of homes81% of homes81% of homes
Year builtnewer than192840% of homes24% of homes20% of homes

About 331 Union Ave

How much is 331 Union Ave, Swarthmore, PA worth?

The TopHap Estimate for 331 Union Ave, Swarthmore, PA is $509,714 as of Sep 24, 2026. The likely range is $469,873 to $549,555. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 331 Union Ave, Swarthmore, PA last sell?

331 Union Ave, Swarthmore, PA last sold on May 30, 2018 for $297,500, according to the county's recorded deed.

How big is 331 Union Ave, Swarthmore, PA?

331 Union Ave, Swarthmore, PA has 3 bedrooms, 1 bathrooms, 1,798 square feet of living space and a 0.37-acre lot.

When was 331 Union Ave, Swarthmore, PA built?

331 Union Ave, Swarthmore, PA was built in 1928, making it 98 years old. The building has 2 stories.

What schools serve 331 Union Ave, Swarthmore, PA?

331 Union Ave, Swarthmore, PA is assigned to Swarthmore-rutledge School (elementary), rated A+; Strath Haven Middle School (middle), rated A; Strath Haven High School (high), rated A+. All sit in Wallingford-Swarthmore School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 331 Union Ave, Swarthmore, PA compare to other homes in Swarthmore 19081?

Among the 3,261 homes in Swarthmore 19081, it is worth more than 43% of them ($509,714 against a typical $554,175), its price per square foot is higher than 53% of them ($283 against a typical $276), it is bigger than 49% of them (1,798 ft² against a typical 1,800 ft²), its lot is bigger than 81% of them (0.37 ac against a typical 0.22 ac) and it is newer than 24% of them (1928 against a typical 1952). Measured against all of Delaware County, it is worth more than 61% 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 331 Union Ave, Swarthmore, PA?

The 2026 property tax bill for 331 Union Ave, Swarthmore, PA was $12,552. The county assessed it at $321,520.

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