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Single Family ResidenceResidential
$507,239$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 90How 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 $225,000 on May 1, 1992

821 KEYSTONE AVE

EMMAUS, PA 18049
4
Beds
3 / 1
Baths
2,496 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.
0.73 ac
Lot SizeThe size of the land the home sits on, from county records.
1951
Year BuiltThe year the home was originally built, according to county records.
3
StoriesHow many floors the home has above ground.
9
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

$507K
$458K low$557K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$225,000 · May 1, 1992

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,060 (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.$277,400 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$67,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$210,200
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$277,400
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$277,400

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
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
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, Attached

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Lincoln Elementary SchoolA
Elementary · Grades KG–5 · 0.4 mi
H
Emmaus High SchoolA
High · Grades 9–12 · 0.8 mi
M
Lower Macungie Middle SchoolB
Middle · Grades 6–8 · 3.9 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

821 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.

  • Worth more than 80% of homes in Lehigh County
  • Costs less per square foot than 72% of homes in Emmaus 18049
  • Bigger than 83% of homes in Emmaus 18049
  • Has a bigger lot than 82% of homes in Lehigh County
  • Older than 65% of homes in Lehigh County

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
$192K$859K

This home is worth more than 78% 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$507,239
CheaperTypical $380,637Pricier

Pricier than 78% of homes nearby

Price per ft²$203
CheaperTypical $225Pricier

Pricier than 28% of homes nearby

Living area2,496 ft²
SmallerTypical 1,692 ft²Bigger

Bigger than 83% of homes nearby

Lot size0.73 ac
SmallerTypical 0.24 acBigger

Bigger than 77% of homes nearby

Year built1951
OlderTypical 1960Newer

Newer than 37% of homes nearby

How 821 Keystone Ave ranks against every home in each area.
MeasureThis homeEmmaus 18049Lehigh County
Estimated valuepricier than$507,23978% of homes80% of homes
Price per ft²pricier than$20328% of homes42% of homes
Living areabigger than2,496 ft²83% of homes83% of homes
Lot sizebigger than0.73 ac77% of homes82% of homes
Year builtnewer than195137% of homes35% of homes

About 821 Keystone Ave

How much is 821 Keystone Ave, Emmaus, PA worth?

The TopHap Estimate for 821 Keystone Ave, Emmaus, PA is $507,239 as of Sep 24, 2026. The likely range is $457,711 to $556,767. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 821 Keystone Ave, Emmaus, PA last sell?

821 Keystone Ave, Emmaus, PA last sold on May 1, 1992 for $225,000, according to the county's recorded deed.

How big is 821 Keystone Ave, Emmaus, PA?

821 Keystone Ave, Emmaus, PA has 4 bedrooms, 3 bathrooms and 2,496 square feet of living space.

When was 821 Keystone Ave, Emmaus, PA built?

821 Keystone Ave, Emmaus, PA was built in 1951, making it 75 years old. It is a split level home. The building has 3 stories.

What schools serve 821 Keystone Ave, Emmaus, PA?

821 Keystone Ave, Emmaus, PA is assigned to Lincoln Elementary School (elementary), rated A; Emmaus High School (high), rated A; 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 821 Keystone Ave, Emmaus, PA compare to other homes in Emmaus 18049?

Among the 6,715 homes in Emmaus 18049, it is worth more than 78% of them ($507,239 against a typical $380,637), its price per square foot is higher than 28% of them ($203 against a typical $225), it is bigger than 83% of them (2,496 ft² against a typical 1,692 ft²), its lot is bigger than 77% of them (0.73 ac against a typical 0.24 ac) and it is newer than 37% of them (1951 against a typical 1960). Measured against all of Lehigh County, it is worth more than 80% 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 821 Keystone Ave, Emmaus, PA?

The 2026 property tax bill for 821 Keystone Ave, Emmaus, PA was $10,060. The county assessed it at $277,400.

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