Skip to content
Skip to content
TopHapOpen in map
TownhouseResidential
$292,173$227 / 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 Aug 30, 2026

20 S PROSPECT AVE

BALTIMORE, MD 21228
1
Baths
1,288 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.
2,604 ft²
Lot SizeThe size of the land the home sits on, from county records.
1940
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$292K
$272K low$313K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,065 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$216,067 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$203,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$242,200

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Townhouse
StyleThe architectural style of the home, such as ranch or colonial.Townhouse
CountyBaltimore
Lot (acres)The size of the land the home sits on, from county records.0.06
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Radiant
CoolingThe type of cooling or air conditioning in the home.Yes
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 · 180 ft²Porch · 77 ft²

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

E
Catonsville Elementary SchoolB+
Elementary · Grades PK–5 · 0.6 mi
H
Catonsville High SchoolA-
High · Grades 9–12 · 1.2 mi
M
Arbutus Middle SchoolC+
Middle · Grades 6–8 · 1.9 mi

District: Baltimore County Public Schools

Neighborhood · ZIP 21228These 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.77
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.85
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.40

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.27%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.9%
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.50,431
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,282 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$108,332
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$127,045
Average tempThe average temperature here across a full year.55°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%

Owner Tools

Do you own this home?
Claim this home

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

20 S Prospect 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 92% of homes in Catonsville 21228
  • Costs less per square foot than 83% of homes in Catonsville 21228
  • Smaller than 70% of homes in Catonsville 21228
  • Has a smaller lot than 84% of homes in Catonsville 21228
  • Older than 90% of homes in Baltimore County

What homes are worth in Catonsville 21228

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

This home
$244K$871K

This home is worth more than 8% of homes in Catonsville 21228.

How it measures up in Catonsville 21228

The dot is this home. The mark in the middle is the typical home in Catonsville 21228.

Estimated value$292,173
CheaperTypical $429,465Pricier

Pricier than 8% of homes nearby

Price per ft²$227
CheaperTypical $272Pricier

Pricier than 17% of homes nearby

Living area1,288 ft²
SmallerTypical 1,508 ft²Bigger

Bigger than 30% of homes nearby

Lot size2,604 ft²
SmallerTypical 0.18 acBigger

Bigger than 16% of homes nearby

Year built1940
OlderTypical 1958Newer

Newer than 17% of homes nearby

How 20 S Prospect Ave ranks against every home in each area.
MeasureThis homeCatonsville 21228Baltimore County
Estimated valuepricier than$292,1738% of homes32% of homes
Price per ft²pricier than$22717% of homes47% of homes
Living areabigger than1,288 ft²30% of homes35% of homes
Lot sizebigger than2,604 ft²16% of homes24% of homes
Year builtnewer than194017% of homes10% of homes

About 20 S Prospect Ave

How much is 20 S Prospect Ave, Baltimore, MD worth?

The TopHap Estimate for 20 S Prospect Ave, Baltimore, MD is $292,173 as of Aug 30, 2026. The likely range is $271,786 to $312,560. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20 S Prospect Ave, Baltimore, MD last sell?

20 S Prospect Ave, Baltimore, MD last sold on Jul 25, 1996, according to the county's recorded deed.

How big is 20 S Prospect Ave, Baltimore, MD?

20 S Prospect Ave, Baltimore, MD has 1 bathrooms, 1,288 square feet of living space and a 0.06-acre lot.

When was 20 S Prospect Ave, Baltimore, MD built?

20 S Prospect Ave, Baltimore, MD was built in 1940, making it 86 years old. It is a townhouse home. The building has 2 stories.

What schools serve 20 S Prospect Ave, Baltimore, MD?

20 S Prospect Ave, Baltimore, MD is assigned to Catonsville Elementary School (elementary), rated B+; Catonsville High School (high), rated A-; Arbutus Middle School (middle), rated C+. All sit in Baltimore County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20 S Prospect Ave, Baltimore, MD compare to other homes in Catonsville 21228?

Among the 15,169 homes in Catonsville 21228, it is worth more than 8% of them ($292,173 against a typical $429,465), its price per square foot is higher than 17% of them ($227 against a typical $272), it is bigger than 30% of them (1,288 ft² against a typical 1,508 ft²), its lot is bigger than 16% of them (2,604 ft² against a typical 0.18 ac) and it is newer than 17% of them (1940 against a typical 1958). Measured against all of Baltimore County, it is worth more than 32% 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 20 S Prospect Ave, Baltimore, MD?

The 2025 property tax bill for 20 S Prospect Ave, Baltimore, MD was $3,065. The county assessed it at $216,067.

More homes on S Prospect Ave

Closest homes

More homes in Baltimore 21228

Assigned schools

Explore the area

See this home in context

Open 20 S Prospect Ave on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map