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Single Family ResidenceResidential
$667,797$347 / 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 89How 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 $543,000 on Dec 20, 2010

4 KNOX PL

SILVER SPRING, MD 20901
2.5
Baths
1,926 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.
0.15 ac
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

$668K
$592K low$743K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$543,000 · Dec 20, 2010

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,041 (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.$609,200 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$242,400
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$366,800
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$609,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$609,200

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.0.15
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.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 · 180 ft²

Transaction History(2)

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
Highland View Elementary SchoolC+
Elementary · Grades KG–5 · 0.3 mi
M
Silver Spring International Middle SchoolB
Middle · Grades 6–8 · 0.5 mi
H
Northwood High SchoolB
High · Grades 9–12 · 2.0 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%

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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

4 Knox Pl 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 74% of homes in Silver Spring 20901
  • Costs more per square foot than 68% of homes in Silver Spring 20901
  • Older than 95% 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
$213K$918K

This home is worth more than 74% 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$667,797
CheaperTypical $580,695Pricier

Pricier than 74% of homes nearby

Price per ft²$347
CheaperTypical $321Pricier

Pricier than 68% of homes nearby

Living area1,926 ft²
SmallerTypical 1,800 ft²Bigger

Bigger than 60% of homes nearby

Lot size0.15 ac
SmallerTypical 0.16 acBigger

Bigger than 42% of homes nearby

Year built1940
OlderTypical 1952Newer

Newer than 18% of homes nearby

How 4 Knox Pl ranks against every home in each area.
MeasureThis homeSilver Spring 20901Montgomery County
Estimated valuepricier than$667,79774% of homes55% of homes
Price per ft²pricier than$34768% of homes68% of homes
Living areabigger than1,926 ft²60% of homes47% of homes
Lot sizebigger than0.15 ac42% of homes46% of homes
Year builtnewer than194018% of homes5% of homes

About 4 Knox Pl

How much is 4 Knox Pl, Silver Spring, MD worth?

The TopHap Estimate for 4 Knox Pl, Silver Spring, MD is $667,797 as of Sep 24, 2026. The likely range is $592,253 to $743,341. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4 Knox Pl, Silver Spring, MD last sell?

4 Knox Pl, Silver Spring, MD last sold on Dec 20, 2010 for $543,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 4 Knox Pl, Silver Spring, MD?

4 Knox Pl, Silver Spring, MD has 2.5 bathrooms, 1,926 square feet of living space and a 0.15-acre lot.

When was 4 Knox Pl, Silver Spring, MD built?

4 Knox Pl, Silver Spring, MD was built in 1940, making it 86 years old. It is a bi-level home. The building has 2 stories.

What schools serve 4 Knox Pl, Silver Spring, MD?

4 Knox Pl, Silver Spring, MD is assigned to Highland View Elementary School (elementary), rated C+; Silver Spring International Middle School (middle), rated B; Northwood High School (high), rated B. All sit in Montgomery County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4 Knox Pl, 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 74% of them ($667,797 against a typical $580,695), its price per square foot is higher than 68% of them ($347 against a typical $321), it is bigger than 60% of them (1,926 ft² against a typical 1,800 ft²), its lot is bigger than 42% of them (0.15 ac against a typical 0.16 ac) and it is newer than 18% of them (1940 against a typical 1952). Measured against all of Montgomery County, it is worth more than 55% 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 4 Knox Pl, Silver Spring, MD?

The 2025 property tax bill for 4 Knox Pl, Silver Spring, MD was $7,041. The county assessed it at $609,200.

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