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Single Family ResidenceResidential
$309,796$238 / 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 80How 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

9990 HARMONY FARM PL

LA PLATA, MD 20646
1
Baths
1,300 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.
31.81 ac
Lot SizeThe size of the land the home sits on, from county records.
1978
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$310K
$249K low$371K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,294 (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.$179,767 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$175,933
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$183,600

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.50
51
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
22
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
78
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
79
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
23
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.15 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.minimal

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
CountyCHARLES
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.Space
CoolingThe type of cooling or air conditioning in the home.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
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 · 288 ft²Porch · 60 ft²

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

E
Margaret J. Thornton Elementary School
Elementary · Grades PK–5 · 0.6 mi
H
La Plata High SchoolB
High · Grades 9–12 · 1.9 mi
M
Milton M. Somers Middle SchoolC-
Middle · Grades 6–8 · 3.5 mi

District: Charles County Public Schools

Neighborhood · ZIP 20646These 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.86
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 100.31

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.18%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.4%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.23,382
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.280 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$129,154
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$147,771
Average tempThe average temperature here across a full year.56°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

9990 Harmony Farm 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 less than 88% of homes in La Plata 20646
  • Costs more per square foot than 77% of homes in La Plata 20646
  • Smaller than 87% of homes in La Plata 20646
  • Among the largest lots in La Plata 20646
  • Older than 72% of homes in La Plata 20646

What homes are worth in La Plata 20646

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

This home
$224K$803K

This home is worth more than 12% of homes in La Plata 20646.

How it measures up in La Plata 20646

The dot is this home. The mark in the middle is the typical home in La Plata 20646.

Estimated value$309,796
CheaperTypical $451,494Pricier

Pricier than 12% of homes nearby

Price per ft²$238
CheaperTypical $207Pricier

Pricier than 77% of homes nearby

Living area1,300 ft²
SmallerTypical 2,218 ft²Bigger

Bigger than 13% of homes nearby

Lot size31.81 ac
SmallerTypical 0.77 acBigger

Bigger than almost all homes nearby

Year built1978
OlderTypical 1992Newer

Newer than 28% of homes nearby

How 9990 Harmony Farm Pl ranks against every home in each area.
MeasureThis homeLa Plata 20646Charles County
Estimated valuepricier than$309,79612% of homes15% of homes
Price per ft²pricier than$23877% of homes76% of homes
Living areabigger than1,300 ft²13% of homes14% of homes
Lot sizebigger than31.81 acalmost all homesalmost all homes
Year builtnewer than197828% of homes28% of homes

About 9990 Harmony Farm Pl

How much is 9990 Harmony Farm Pl, La Plata, MD worth?

The TopHap Estimate for 9990 Harmony Farm Pl, La Plata, MD is $309,796 as of Sep 24, 2026. The likely range is $248,689 to $370,903. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 9990 Harmony Farm Pl, La Plata, MD last sell?

9990 Harmony Farm Pl, La Plata, MD last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 9990 Harmony Farm Pl, La Plata, MD?

9990 Harmony Farm Pl, La Plata, MD has 1 bathrooms and 1,300 square feet of living space.

When was 9990 Harmony Farm Pl, La Plata, MD built?

9990 Harmony Farm Pl, La Plata, MD was built in 1978, making it 48 years old. It is a conventional home. The building has 2 stories.

What schools serve 9990 Harmony Farm Pl, La Plata, MD?

9990 Harmony Farm Pl, La Plata, MD is assigned to Margaret J. Thornton Elementary School (elementary); La Plata High School (high), rated B; Milton M. Somers Middle School (middle), rated C-. All sit in Charles County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 9990 Harmony Farm Pl, La Plata, MD compare to other homes in La Plata 20646?

Among the 8,787 homes in La Plata 20646, it is worth more than 12% of them ($309,796 against a typical $451,494), its price per square foot is higher than 77% of them ($238 against a typical $207), it is bigger than 13% of them (1,300 ft² against a typical 2,218 ft²), its lot is bigger than almost all of them (31.81 ac against a typical 0.77 ac) and it is newer than 28% of them (1978 against a typical 1992). Measured against all of Charles County, it is worth more than 15% 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 9990 Harmony Farm Pl, La Plata, MD?

The 2025 property tax bill for 9990 Harmony Farm Pl, La Plata, MD was $6,294. The county assessed it at $179,767.

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