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Single Family ResidenceResidential
$347,139$245 / 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 Aug 30, 2026
Last sold for $325,000 on Nov 29, 2023

509 JOHN AVE

ESSEX, MD 21221
2
Baths
1,416 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.
1984
Year BuiltThe year the home was originally built, according to county records.

Valuation

$347K
$329K low$366K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$325,000 · Nov 29, 2023

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,554 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$270,067 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$254,533
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$285,600

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 Foyer
CountyBALTIMORE
Lot (acres)The size of the land the home sits on, from county records.0.14
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Yes
CoolingThe type of cooling or air conditioning 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
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck · 340 ft²Porch · 204 ft²

Transaction History(6)

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
Kenwood High SchoolD-
High · Grades 9–12 · 0.2 mi
M
Stemmers Run Middle SchoolD
Middle · Grades 6–8 · 0.6 mi
E
Essex Elementary SchoolC-
Elementary · Grades PK–5 · 1.4 mi

District: Baltimore County Public Schools

Neighborhood · ZIP 21221These 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.123
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 100.44

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.12%
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.0.9%
PopulationHow many people live in this area.42,396
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,898 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$76,330
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$89,410
Average tempThe average temperature here across a full year.56°F
Annual precipHow much rain and melted snow falls here in a typical year.45 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.57%

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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

509 John 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 68% of homes in Essex 21221
  • Costs more per square foot than 76% of homes in Essex 21221
  • Newer than 73% of homes in Essex 21221

What homes are worth in Essex 21221

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

This home
$140K$737K

This home is worth more than 68% of homes in Essex 21221.

How it measures up in Essex 21221

The dot is this home. The mark in the middle is the typical home in Essex 21221.

Estimated value$347,139
CheaperTypical $282,136Pricier

Pricier than 68% of homes nearby

Price per ft²$245
CheaperTypical $207Pricier

Pricier than 76% of homes nearby

Living area1,416 ft²
SmallerTypical 1,248 ft²Bigger

Bigger than 61% of homes nearby

Lot size0.14 ac
SmallerTypical 0.16 acBigger

Bigger than 41% of homes nearby

Year built1984
OlderTypical 1957Newer

Newer than 73% of homes nearby

How 509 John Ave ranks against every home in each area.
MeasureThis homeEssex 21221Baltimore County
Estimated valuepricier than$347,13968% of homes48% of homes
Price per ft²pricier than$24576% of homes60% of homes
Living areabigger than1,416 ft²61% of homes46% of homes
Lot sizebigger than0.14 ac41% of homes40% of homes
Year builtnewer than198473% of homes68% of homes

About 509 John Ave

How much is 509 John Ave, Essex, MD worth?

The TopHap Estimate for 509 John Ave, Essex, MD is $347,139 as of Aug 30, 2026. The likely range is $328,728 to $365,550. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 509 John Ave, Essex, MD last sell?

509 John Ave, Essex, MD last sold on Nov 29, 2023 for $325,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 509 John Ave, Essex, MD?

509 John Ave, Essex, MD has 2 bathrooms, 1,416 square feet of living space and a 0.14-acre lot.

When was 509 John Ave, Essex, MD built?

509 John Ave, Essex, MD was built in 1984, making it 42 years old. It is a split foyer home.

What schools serve 509 John Ave, Essex, MD?

509 John Ave, Essex, MD is assigned to Kenwood High School (high), rated D-; Stemmers Run Middle School (middle), rated D; Essex Elementary School (elementary), rated C-. All sit in Baltimore County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 509 John Ave, Essex, MD compare to other homes in Essex 21221?

Among the 12,678 homes in Essex 21221, it is worth more than 68% of them ($347,139 against a typical $282,136), its price per square foot is higher than 76% of them ($245 against a typical $207), it is bigger than 61% of them (1,416 ft² against a typical 1,248 ft²), its lot is bigger than 41% of them (0.14 ac against a typical 0.16 ac) and it is newer than 73% of them (1984 against a typical 1957). Measured against all of Baltimore County, it is worth more than 48% 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 509 John Ave, Essex, MD?

The 2024 property tax bill for 509 John Ave, Essex, MD was $3,554. The county assessed it at $270,067.

More homes on John Ave

Closest homes

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Assigned schools

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