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Single Family ResidenceResidential
$418,464$203 / 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 93How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026
Last sold for $246,500 on May 19, 2010

121 W MARTIN ST

ALLENTOWN, PA 18103
4
Beds
3 / 1
Baths
2,065 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.
0.14 ac
Lot SizeThe size of the land the home sits on, from county records.
2010
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.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$418K
$391K low$446K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$246,500 · May 19, 2010

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,855 (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.$207,200 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$21,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$186,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$207,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$207,200

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyLehigh
Lot (acres)The size of the land the home sits on, from county records.0.14
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached

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
South Mountain Middle SchoolF
Middle · Grades 6–8 · 0.6 mi
E
Hiram W. Dodd Elementary SchoolD
Elementary · Grades KG–5 · 0.6 mi
H
Louis E. Dieruff High SchoolD-
High · Grades 9–12 · 3.0 mi

District: Allentown School District

Neighborhood · ZIP 18103These 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.101
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.88
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.72

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.18%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.12%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.48,496
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,771 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$74,179
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$90,226
Average tempThe average temperature here across a full year.51°F
Annual precipHow much rain and melted snow falls here in a typical year.47 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.53%

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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

121 W Martin 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 97% of homes in Mountainville
  • Bigger than 92% of homes in Mountainville
  • Newer than 98% of homes in Mountainville

What homes are worth in Allentown 18103

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

This home
$175K$777K

This home is worth more than 78% of homes in Allentown 18103.

How it measures up in Allentown 18103

The dot is this home. The mark in the middle is the typical home in Allentown 18103.

Estimated value$418,464
CheaperTypical $300,840Pricier

Pricier than 78% of homes nearby

Price per ft²$203
CheaperTypical $215Pricier

Pricier than 36% of homes nearby

Living area2,065 ft²
SmallerTypical 1,402 ft²Bigger

Bigger than 79% of homes nearby

Lot size0.14 ac
SmallerTypical 0.18 acBigger

Bigger than 38% of homes nearby

Year built2010
OlderTypical 1960Newer

Newer than 98% of homes nearby

How 121 W Martin St ranks against every home in each area.
MeasureThis homeMountainvilleAllentown 18103Lehigh County
Estimated valuepricier than$418,46497% of homes78% of homes68% of homes
Price per ft²pricier than$20340% of homes36% of homes42% of homes
Living areabigger than2,065 ft²92% of homes79% of homes70% of homes
Lot sizebigger than0.14 ac42% of homes38% of homes36% of homes
Year builtnewer than201098% of homes98% of homes94% of homes

About 121 W Martin St

How much is 121 W Martin St, Allentown, PA worth?

The TopHap Estimate for 121 W Martin St, Allentown, PA is $418,464 as of Oct 21, 2026. The likely range is $390,891 to $446,037. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 121 W Martin St, Allentown, PA last sell?

121 W Martin St, Allentown, PA last sold on May 19, 2010 for $246,500, according to the county's recorded deed.

How big is 121 W Martin St, Allentown, PA?

121 W Martin St, Allentown, PA has 4 bedrooms, 3 bathrooms, 2,065 square feet of living space and a 0.14-acre lot.

When was 121 W Martin St, Allentown, PA built?

121 W Martin St, Allentown, PA was built in 2010, making it 16 years old. The building has 2 stories.

What schools serve 121 W Martin St, Allentown, PA?

121 W Martin St, Allentown, PA is assigned to South Mountain Middle School (middle), rated F; Hiram W. Dodd Elementary School (elementary), rated D; Louis E. Dieruff High School (high), rated D-. All sit in Allentown School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 121 W Martin St, Allentown, PA compare to other homes in Allentown 18103?

Among the 14,352 homes in Allentown 18103, it is worth more than 78% of them ($418,464 against a typical $300,840), its price per square foot is higher than 36% of them ($203 against a typical $215), it is bigger than 79% of them (2,065 ft² against a typical 1,402 ft²), its lot is bigger than 38% of them (0.14 ac against a typical 0.18 ac) and it is newer than 98% of them (2010 against a typical 1960). Measured against all of Lehigh County, it is worth more than 68% 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 121 W Martin St, Allentown, PA?

The 2026 property tax bill for 121 W Martin St, Allentown, PA was $6,855. The county assessed it at $207,200.

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