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CondominiumResidential
$521,185$180 / 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 Oct 21, 2026
Last sold for $430,000 on Sep 10, 2021

643 CEDAR SPRING ST

GAITHERSBURG, MD 20877
0
Baths
2,894 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.
1 ac
Lot SizeThe size of the land the home sits on, from county records.
2006
Year BuiltThe year the home was originally built, according to county records.

Valuation

$521K
$497K low$545K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$430,000 · Sep 10, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,771 (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.$420,000 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$126,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$294,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$398,333
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$420,000

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.39
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
7
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
75
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
80
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
34
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
CountyMONTGOMERY
Lot (acres)The size of the land the home sits on, from county records.0.00
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(3)

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.

M
Gaithersburg Middle SchoolD+
Middle · Grades 6–8 · 0.7 mi
E
Gaithersburg Elementary SchoolD
Elementary · Grades PK–5 · 0.7 mi
H
Gaithersburg High SchoolD+
High · Grades 9–12 · 1.2 mi

District: Montgomery County Public Schools

Neighborhood · ZIP 20877These 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.124
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.83
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.36

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.21%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.14%
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.38,931
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.6,116 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$84,983
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$109,325
Average tempThe average temperature here across a full year.54°F
Annual precipHow much rain and melted snow falls here in a typical year.43 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

643 Cedar Spring St 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 65% of homes in Montgomery County
  • Costs less per square foot than 97% of homes in Montgomery County
  • Bigger than 89% of homes in Gaithersburg 20877
  • Among the largest lots in Gaithersburg
  • Newer than 93% of homes in Gaithersburg 20877

What homes are worth in Gaithersburg 20877

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

This home
$159K$797K

This home is worth more than 60% of homes in Gaithersburg 20877.

How it measures up in Gaithersburg 20877

The dot is this home. The mark in the middle is the typical home in Gaithersburg 20877.

Estimated value$521,185
CheaperTypical $462,302Pricier

Pricier than 60% of homes nearby

Price per ft²$180
CheaperTypical $252Pricier

Pricier than 8% of homes nearby

Living area2,894 ft²
SmallerTypical 1,715 ft²Bigger

Bigger than 89% of homes nearby

Lot size1 ac
SmallerTypical 3,920 ft²Bigger

Bigger than almost all homes nearby

Year built2006
OlderTypical 1980Newer

Newer than 93% of homes nearby

How 643 Cedar Spring St ranks against every home in each area.
MeasureThis homeGaithersburgGaithersburg 20877Montgomery County
Estimated valuepricier than$521,18552% of homes60% of homes35% of homes
Price per ft²pricier than$1806% of homes8% of homes3% of homes
Living areabigger than2,894 ft²85% of homes89% of homes76% of homes
Lot sizebigger than1 acalmost all homesalmost all homes95% of homes
Year builtnewer than200688% of homes93% of homes91% of homes

About 643 Cedar Spring St

How much is 643 Cedar Spring St, Gaithersburg, MD worth?

The TopHap Estimate for 643 Cedar Spring St, Gaithersburg, MD is $521,185 as of Oct 21, 2026. The likely range is $497,176 to $545,194. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 643 Cedar Spring St, Gaithersburg, MD last sell?

643 Cedar Spring St, Gaithersburg, MD last sold on Sep 10, 2021 for $430,000, according to the county's recorded deed.

How big is 643 Cedar Spring St, Gaithersburg, MD?

643 Cedar Spring St, Gaithersburg, MD has 2,894 square feet of living space and a 0.00-acre lot.

When was 643 Cedar Spring St, Gaithersburg, MD built?

643 Cedar Spring St, Gaithersburg, MD was built in 2006, making it 20 years old. It is a condo/apartment home.

What schools serve 643 Cedar Spring St, Gaithersburg, MD?

643 Cedar Spring St, Gaithersburg, MD is assigned to Gaithersburg Middle School (middle), rated D+; Gaithersburg Elementary School (elementary), rated D; Gaithersburg High School (high), rated D+. All sit in Montgomery County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 643 Cedar Spring St, Gaithersburg, MD compare to other homes in Gaithersburg 20877?

Among the 6,654 homes in Gaithersburg 20877, it is worth more than 60% of them ($521,185 against a typical $462,302), its price per square foot is higher than 8% of them ($180 against a typical $252), it is bigger than 89% of them (2,894 ft² against a typical 1,715 ft²), its lot is bigger than almost all of them (1 ac against a typical 3,920 ft²) and it is newer than 93% of them (2006 against a typical 1980). Measured against all of Montgomery County, it is worth more than 35% 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 643 Cedar Spring St, Gaithersburg, MD?

The 2025 property tax bill for 643 Cedar Spring St, Gaithersburg, MD was $4,771. The county assessed it at $420,000.

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