Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$589,349$399 / 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 Jul 14, 2026
Last sold for $515,000 on Apr 8, 2024

10221 BIG ROCK RD

SILVER SPRING, MD 20901
1
Baths
1,476 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.
0.19 ac
Lot SizeThe size of the land the home sits on, from county records.
1948
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$589K
$528K low$651K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$515,000 · Apr 8, 2024

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,443 (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.$514,333 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$495,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$553,000

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.Bi-Level
CountyMONTGOMERY
Lot (acres)The size of the land the home sits on, from county records.0.19
ConstructionThe main material the home's frame and walls are built from.Brick
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.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.Patio · 240 ft²Porch · 240 ft²

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.

H
Montgomery Blair High SchoolB
High · Grades 9–12 · 0.8 mi
M
Eastern Middle SchoolC
Middle · Grades 6–8 · 0.8 mi
E
Montgomery Knolls Elementary School
Elementary · Grades PK–2 · 1.2 mi

District: Montgomery County Public Schools

Neighborhood · ZIP 20901These 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.85
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.96
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.35

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.25%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.4%
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.37,269
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.6,931 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$131,433
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$160,311
Average tempThe average temperature here across a full year.55°F
Annual precipHow much rain and melted snow falls here in a typical year.44 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

10221 Big Rock 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.

  • Costs more per square foot than 85% of homes in Silver Spring 20901
  • Smaller than 75% of homes in Silver Spring 20901
  • Has a bigger lot than 73% of homes in Silver Spring 20901
  • Older than 92% of homes in Montgomery County

What homes are worth in Silver Spring 20901

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

This home
$224K$943K

This home is worth more than 47% of homes in Silver Spring 20901.

How it measures up in Silver Spring 20901

The dot is this home. The mark in the middle is the typical home in Silver Spring 20901.

Estimated value$589,349
CheaperTypical $598,019Pricier

Pricier than 47% of homes nearby

Price per ft²$399
CheaperTypical $328Pricier

Pricier than 85% of homes nearby

Living area1,476 ft²
SmallerTypical 1,798 ft²Bigger

Bigger than 25% of homes nearby

Lot size0.19 ac
SmallerTypical 0.16 acBigger

Bigger than 73% of homes nearby

Year built1948
OlderTypical 1952Newer

Newer than 38% of homes nearby

How 10221 Big Rock Rd ranks against every home in each area.
MeasureThis homeSilver Spring 20901Montgomery County
Estimated valuepricier than$589,34947% of homes43% of homes
Price per ft²pricier than$39985% of homes82% of homes
Living areabigger than1,476 ft²25% of homes28% of homes
Lot sizebigger than0.19 ac73% of homes57% of homes
Year builtnewer than194838% of homes8% of homes

About 10221 Big Rock Rd

How much is 10221 Big Rock Rd, Silver Spring, MD worth?

The TopHap Estimate for 10221 Big Rock Rd, Silver Spring, MD is $589,349 as of Jul 14, 2026. The likely range is $527,512 to $651,186. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 10221 Big Rock Rd, Silver Spring, MD last sell?

10221 Big Rock Rd, Silver Spring, MD last sold on Apr 8, 2024 for $515,000, according to the county's recorded deed.

How big is 10221 Big Rock Rd, Silver Spring, MD?

10221 Big Rock Rd, Silver Spring, MD has 1 bathrooms, 1,476 square feet of living space and a 0.19-acre lot.

When was 10221 Big Rock Rd, Silver Spring, MD built?

10221 Big Rock Rd, Silver Spring, MD was built in 1948, making it 78 years old. It is a bi-level home. The building has 2 stories.

What schools serve 10221 Big Rock Rd, Silver Spring, MD?

10221 Big Rock Rd, Silver Spring, MD is assigned to Montgomery Blair High School (high), rated B; Eastern Middle School (middle), rated C; Montgomery Knolls Elementary School (elementary). All sit in Montgomery County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 10221 Big Rock Rd, Silver Spring, MD compare to other homes in Silver Spring 20901?

Among the 10,023 homes in Silver Spring 20901, it is worth more than 47% of them ($589,349 against a typical $598,019), its price per square foot is higher than 85% of them ($399 against a typical $328), it is bigger than 25% of them (1,476 ft² against a typical 1,798 ft²), its lot is bigger than 73% of them (0.19 ac against a typical 0.16 ac) and it is newer than 38% of them (1948 against a typical 1952). Measured against all of Montgomery County, it is worth more than 43% 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 10221 Big Rock Rd, Silver Spring, MD?

The 2025 property tax bill for 10221 Big Rock Rd, Silver Spring, MD was $6,443. The county assessed it at $514,333.

More homes on Big Rock Rd

Closest homes

More homes in Silver Spring 20901

Assigned schools

Explore the area

See this home in context

Open 10221 Big Rock Rd 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