Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$512,151$411 / 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 Aug 30, 2026
Last sold for $265,000 on Aug 9, 2001

12031 PATAPSCO RIDGE RD

MARRIOTTSVILLE, MD 21104
2
Baths
1,245 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.
9.25 ac
Lot SizeThe size of the land the home sits on, from county records.
1977
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$512K
$456K low$568K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$265,000 · Aug 9, 2001

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,203 (2026)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$697,933 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$665,067
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$730,800

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.53 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
CountyHOWARD
Lot (acres)The size of the land the home sits on, from county records.9.25
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Electric
FireplaceWhether the home has a fireplace, and what kind.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.StableDeck · 105 ft²Shed · 144 ft²Patio · 400 ft²Porch · 400 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.

H
Marriotts Ridge High SchoolA+
High · Grades 9–12 · 1.8 mi
M
Mount View Middle SchoolA
Middle · Grades 6–8 · 1.9 mi
E
West Friendship Elementary SchoolA
Elementary · Grades KG–5 · 3.3 mi

District: Howard County Public Schools

Neighborhood · ZIP 21104These 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.99
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.86
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.45

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.98%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.37%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.6,580
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.368 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$159,012
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$206,489
Average tempThe average temperature here across a full year.54°F
Annual precipHow much rain and melted snow falls here in a typical year.46 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

12031 Patapsco Ridge 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.

  • Worth less than 82% of homes in Marriottsville 21104
  • Costs more per square foot than 95% of homes in Marriottsville 21104
  • Smaller than 95% of homes in Marriottsville 21104
  • Has a bigger lot than 98% of homes in Howard County
  • Older than 81% of homes in Marriottsville 21104

What homes are worth in Marriottsville 21104

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

This home
$359K$1.4M

This home is worth more than 18% of homes in Marriottsville 21104.

How it measures up in Marriottsville 21104

The dot is this home. The mark in the middle is the typical home in Marriottsville 21104.

Estimated value$512,151
CheaperTypical $707,132Pricier

Pricier than 18% of homes nearby

Price per ft²$411
CheaperTypical $295Pricier

Pricier than 95% of homes nearby

Living area1,245 ft²
SmallerTypical 2,407 ft²Bigger

Bigger than 5% of homes nearby

Lot size9.25 ac
SmallerTypical 0.59 acBigger

Bigger than 97% of homes nearby

Year built1977
OlderTypical 1997Newer

Newer than 19% of homes nearby

How 12031 Patapsco Ridge Rd ranks against every home in each area.
MeasureThis homeMarriottsville 21104Howard County
Estimated valuepricier than$512,15118% of homes33% of homes
Price per ft²pricier than$41195% of homes94% of homes
Living areabigger than1,245 ft²5% of homes15% of homes
Lot sizebigger than9.25 ac97% of homes98% of homes
Year builtnewer than197719% of homes25% of homes

About 12031 Patapsco Ridge Rd

How much is 12031 Patapsco Ridge Rd, Marriottsville, MD worth?

The TopHap Estimate for 12031 Patapsco Ridge Rd, Marriottsville, MD is $512,151 as of Aug 30, 2026. The likely range is $455,981 to $568,321. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 12031 Patapsco Ridge Rd, Marriottsville, MD last sell?

12031 Patapsco Ridge Rd, Marriottsville, MD last sold on Aug 9, 2001 for $265,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 12031 Patapsco Ridge Rd, Marriottsville, MD?

12031 Patapsco Ridge Rd, Marriottsville, MD has 2 bathrooms, 1,245 square feet of living space and a 9.25-acre lot.

When was 12031 Patapsco Ridge Rd, Marriottsville, MD built?

12031 Patapsco Ridge Rd, Marriottsville, MD was built in 1977, making it 49 years old. The building has 1 story.

What schools serve 12031 Patapsco Ridge Rd, Marriottsville, MD?

12031 Patapsco Ridge Rd, Marriottsville, MD is assigned to Marriotts Ridge High School (high), rated A+; Mount View Middle School (middle), rated A; West Friendship Elementary School (elementary), rated A. All sit in Howard County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 12031 Patapsco Ridge Rd, Marriottsville, MD compare to other homes in Marriottsville 21104?

Among the 2,302 homes in Marriottsville 21104, it is worth more than 18% of them ($512,151 against a typical $707,132), its price per square foot is higher than 95% of them ($411 against a typical $295), it is bigger than 5% of them (1,245 ft² against a typical 2,407 ft²), its lot is bigger than 97% of them (9.25 ac against a typical 0.59 ac) and it is newer than 19% of them (1977 against a typical 1997). Measured against all of Howard County, it is worth more than 33% 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 12031 Patapsco Ridge Rd, Marriottsville, MD?

The 2026 property tax bill for 12031 Patapsco Ridge Rd, Marriottsville, MD was $6,203. The county assessed it at $697,933.

More homes on Patapsco Ridge Rd

Closest homes

More homes in Marriottsville 21104

Assigned schools

Explore the area

See this home in context

Open 12031 Patapsco Ridge 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