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TownhouseResidential
$226,110$262 / 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 $139,900 on Jun 8, 2004

604 SAINT MARYS AVE

LA PLATA, MD 20646
1
Baths
864 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.
0.13 ac
Lot SizeThe size of the land the home sits on, from county records.
1987
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$226K
$211K low$241K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$139,900 · Jun 8, 2004

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,982 (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.$202,800 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$85,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$117,800
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$191,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$202,800

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.40
1
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.
80
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.
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.Townhouse
StyleThe architectural style of the home, such as ranch or colonial.Townhouse
CountyCHARLES
Lot (acres)The size of the land the home sits on, from county records.0.13
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Heat Pump
CoolingThe type of cooling or air conditioning in the home.Central
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.Porch · 52 ft²

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.

E
Walter J. Mitchell Elementary SchoolA-
Elementary · Grades PK–5 · 0.5 mi
M
Milton M. Somers Middle SchoolC-
Middle · Grades 6–8 · 0.5 mi
H
La Plata High SchoolB
High · Grades 9–12 · 2.5 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

604 Saint Marys Ave 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.

  • Among the least valuable homes in La Plata 20646
  • Costs more per square foot than 88% of homes in Charles County
  • Among the smallest homes in La Plata 20646
  • Has a smaller lot than 76% 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
$254K$876K

This home is worth less than almost all 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$226,110
CheaperTypical $465,000Pricier

Cheaper than almost all homes nearby

Price per ft²$262
CheaperTypical $209Pricier

Pricier than 87% of homes nearby

Living area864 ft²
SmallerTypical 2,212 ft²Bigger

Smaller than almost all homes nearby

Lot size0.13 ac
SmallerTypical 0.77 acBigger

Bigger than 24% of homes nearby

Year built1987
OlderTypical 1992Newer

Newer than 42% of homes nearby

How 604 Saint Marys Ave ranks against every home in each area.
MeasureThis homeLa Plata 20646Charles County
Estimated valuepricier than$226,110almost no homes2% of homes
Price per ft²pricier than$26287% of homes88% of homes
Living areabigger than864 ft²almost no homes2% of homes
Lot sizebigger than0.13 ac24% of homes24% of homes
Year builtnewer than198742% of homes43% of homes

About 604 Saint Marys Ave

How much is 604 Saint Marys Ave, La Plata, MD worth?

The TopHap Estimate for 604 Saint Marys Ave, La Plata, MD is $226,110 as of Aug 30, 2026. The likely range is $211,442 to $240,778. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 604 Saint Marys Ave, La Plata, MD last sell?

604 Saint Marys Ave, La Plata, MD last sold on Jun 8, 2004 for $139,900, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 604 Saint Marys Ave, La Plata, MD?

604 Saint Marys Ave, La Plata, MD has 1 bathrooms, 864 square feet of living space and a 0.13-acre lot.

When was 604 Saint Marys Ave, La Plata, MD built?

604 Saint Marys Ave, La Plata, MD was built in 1987, making it 39 years old. It is a townhouse home. The building has 1 story.

What schools serve 604 Saint Marys Ave, La Plata, MD?

604 Saint Marys Ave, La Plata, MD is assigned to Walter J. Mitchell Elementary School (elementary), rated A-; Milton M. Somers Middle School (middle), rated C-; La Plata High School (high), rated B. All sit in Charles County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 604 Saint Marys Ave, La Plata, MD compare to other homes in La Plata 20646?

Among the 8,782 homes in La Plata 20646, it is worth more than almost none of them ($226,110 against a typical $465,000), its price per square foot is higher than 87% of them ($262 against a typical $209), it is bigger than almost none of them (864 ft² against a typical 2,212 ft²), its lot is bigger than 24% of them (0.13 ac against a typical 0.77 ac) and it is newer than 42% of them (1987 against a typical 1992). Measured against all of Charles County, it is worth more than 2% 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 604 Saint Marys Ave, La Plata, MD?

The 2025 property tax bill for 604 Saint Marys Ave, La Plata, MD was $2,982. The county assessed it at $202,800.

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