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Single Family ResidenceResidential
$394,905$329 / 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 94How 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 $337,000 on May 1, 2020

510 GROVETHORN RD

MIDDLE RIVER, MD 21220
1
Baths
1,200 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.
0.3 ac
Lot SizeThe size of the land the home sits on, from county records.
1926
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$395K
$371K low$418K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$337,000 · May 1, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,368 (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.$303,933 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$289,567
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$318,300

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.20 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.1 percent flood zone

Scores 0–100; higher = greater projected risk.

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.Conventional
CountyBaltimore
Lot (acres)The size of the land the home sits on, from county records.0.30
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
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.Spa/Hot Tub (Only)
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 400 ft²Porch · 60 ft²Boat access

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.

E
Hawthorne Elementary SchoolD-
Elementary · Grades PK–5 · 0.4 mi
M
Stemmers Run Middle SchoolD
Middle · Grades 6–8 · 1.2 mi
H
Kenwood High SchoolD-
High · Grades 9–12 · 1.5 mi

District: Baltimore County Public Schools

Neighborhood · ZIP 21220These 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.107
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.95
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.48

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.20%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.18%
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.43,388
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,388 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$88,236
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$102,046
Average tempThe average temperature here across a full year.56°F
Annual precipHow much rain and melted snow falls here in a typical year.46 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.57%

Owner Tools

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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

510 Grovethorn Rd 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 65% of homes in Middle River 21220
  • Costs more per square foot than 92% of homes in Middle River 21220
  • Smaller than 72% of homes in Baltimore County
  • Has a bigger lot than 81% of homes in Middle River 21220
  • Older than 98% of homes in Middle River 21220

What homes are worth in Middle River 21220

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

This home
$153K$846K

This home is worth more than 65% of homes in Middle River 21220.

How it measures up in Middle River 21220

The dot is this home. The mark in the middle is the typical home in Middle River 21220.

Estimated value$394,905
CheaperTypical $334,600Pricier

Pricier than 65% of homes nearby

Price per ft²$329
CheaperTypical $218Pricier

Pricier than 92% of homes nearby

Living area1,200 ft²
SmallerTypical 1,428 ft²Bigger

Bigger than 38% of homes nearby

Lot size0.3 ac
SmallerTypical 0.13 acBigger

Bigger than 81% of homes nearby

Year built1926
OlderTypical 1980Newer

Newer than 2% of homes nearby

How 510 Grovethorn Rd ranks against every home in each area.
MeasureThis homeMiddle River 21220Baltimore County
Estimated valuepricier than$394,90565% of homes60% of homes
Price per ft²pricier than$32992% of homes92% of homes
Living areabigger than1,200 ft²38% of homes28% of homes
Lot sizebigger than0.3 ac81% of homes75% of homes
Year builtnewer than19262% of homes5% of homes

About 510 Grovethorn Rd

How much is 510 Grovethorn Rd, Middle River, MD worth?

The TopHap Estimate for 510 Grovethorn Rd, Middle River, MD is $394,905 as of Aug 30, 2026. The likely range is $371,370 to $418,440. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 510 Grovethorn Rd, Middle River, MD last sell?

510 Grovethorn Rd, Middle River, MD last sold on May 1, 2020 for $337,000, according to the county's recorded deed.

How big is 510 Grovethorn Rd, Middle River, MD?

510 Grovethorn Rd, Middle River, MD has 1 bathrooms, 1,200 square feet of living space and a 0.30-acre lot.

When was 510 Grovethorn Rd, Middle River, MD built?

510 Grovethorn Rd, Middle River, MD was built in 1926, making it 100 years old. It is a conventional home. The building has 1 story.

What schools serve 510 Grovethorn Rd, Middle River, MD?

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

How does 510 Grovethorn Rd, Middle River, MD compare to other homes in Middle River 21220?

Among the 13,106 homes in Middle River 21220, it is worth more than 65% of them ($394,905 against a typical $334,600), its price per square foot is higher than 92% of them ($329 against a typical $218), it is bigger than 38% of them (1,200 ft² against a typical 1,428 ft²), its lot is bigger than 81% of them (0.3 ac against a typical 0.13 ac) and it is newer than 2% of them (1926 against a typical 1980). Measured against all of Baltimore County, it is worth more than 60% 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 510 Grovethorn Rd, Middle River, MD?

The 2025 property tax bill for 510 Grovethorn Rd, Middle River, MD was $4,368. The county assessed it at $303,933.

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