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Single Family ResidenceResidential
$357,087$219 / 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 95How 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 $182,000 on Nov 17, 2009

428 KEYSTONE AVE

EMMAUS, PA 18049
4
Beds
1
Baths
1,628 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.
0.17 ac
Lot SizeThe size of the land the home sits on, from county records.
1947
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

$357K
$339K low$375K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$182,000 · Nov 17, 2009

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,944 (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.$163,900 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$26,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$137,700
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$163,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$163,900

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.Split Level
CountyLehigh
Lot (acres)The size of the land the home sits on, from county records.0.17
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
HeatingThe type of heating system in the home.Baseboard
GarageWhether the property has a garage, and details like whether it is attached to the home.No Garage

Transaction History(3)

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
Lincoln Elementary SchoolB
Elementary · Grades KG–5 · 0.1 mi
H
Emmaus High SchoolB+
High · Grades 9–12 · 0.8 mi
M
Lower Macungie Middle SchoolB
Middle · Grades 6–8 · 4.2 mi

District: East Penn School District

Neighborhood · ZIP 18049These 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.73
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.92
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.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.1%
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.19,279
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,284 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$98,006
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$118,840
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

428 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.

  • Has a smaller lot than 67% of homes in Emmaus 18049
  • Older than 69% of homes in Emmaus 18049

What homes are worth in Emmaus 18049

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

This home
$184K$811K

This home is worth more than 44% of homes in Emmaus 18049.

How it measures up in Emmaus 18049

The dot is this home. The mark in the middle is the typical home in Emmaus 18049.

Estimated value$357,087
CheaperTypical $378,365Pricier

Pricier than 44% of homes nearby

Price per ft²$219
CheaperTypical $223Pricier

Pricier than 46% of homes nearby

Living area1,628 ft²
SmallerTypical 1,701 ft²Bigger

Bigger than 46% of homes nearby

Lot size0.17 ac
SmallerTypical 0.24 acBigger

Bigger than 33% of homes nearby

Year built1947
OlderTypical 1959Newer

Newer than 31% of homes nearby

How 428 Keystone Ave ranks against every home in each area.
MeasureThis homeEmmaus 18049Lehigh County
Estimated valuepricier than$357,08744% of homes55% of homes
Price per ft²pricier than$21946% of homes58% of homes
Living areabigger than1,628 ft²46% of homes46% of homes
Lot sizebigger than0.17 ac33% of homes42% of homes
Year builtnewer than194731% of homes31% of homes

About 428 Keystone Ave

How much is 428 Keystone Ave, Emmaus, PA worth?

The TopHap Estimate for 428 Keystone Ave, Emmaus, PA is $357,087 as of Oct 21, 2026. The likely range is $339,356 to $374,818. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 428 Keystone Ave, Emmaus, PA last sell?

428 Keystone Ave, Emmaus, PA last sold on Nov 17, 2009 for $182,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 428 Keystone Ave, Emmaus, PA?

428 Keystone Ave, Emmaus, PA has 4 bedrooms, 1 bathrooms, 1,628 square feet of living space and a 0.17-acre lot.

When was 428 Keystone Ave, Emmaus, PA built?

428 Keystone Ave, Emmaus, PA was built in 1947, making it 79 years old. It is a split level home. The building has 2 stories.

What schools serve 428 Keystone Ave, Emmaus, PA?

428 Keystone Ave, Emmaus, PA is assigned to Lincoln Elementary School (elementary), rated B; Emmaus High School (high), rated B+; Lower Macungie Middle School (middle), rated B. All sit in East Penn School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 428 Keystone Ave, Emmaus, PA compare to other homes in Emmaus 18049?

Among the 6,715 homes in Emmaus 18049, it is worth more than 44% of them ($357,087 against a typical $378,365), its price per square foot is higher than 46% of them ($219 against a typical $223), it is bigger than 46% of them (1,628 ft² against a typical 1,701 ft²), its lot is bigger than 33% of them (0.17 ac against a typical 0.24 ac) and it is newer than 31% of them (1947 against a typical 1959). Measured against all of Lehigh County, it is worth more than 55% 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 428 Keystone Ave, Emmaus, PA?

The 2026 property tax bill for 428 Keystone Ave, Emmaus, PA was $5,944. The county assessed it at $163,900.

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