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Rural ResidenceResidential
$437,404$325 / 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

12129 ROSEMONT FARM LN

BIG POOL, MD 21711
1.5
Baths
1,344 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.
17.48 ac
Lot SizeThe size of the land the home sits on, from county records.
1995
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$437K
$390K low$485K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,339 (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.$316,300 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$73,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$243,100
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$285,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$316,300

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Rural Residence
CountyWASHINGTON
Lot (acres)The size of the land the home sits on, from county records.17.48
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.Yes
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, Basement
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 · 112 ft²Shed · 352 ft²Patio · 392 ft²Porch · 384 ft²

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

H
Clear Spring High SchoolB+
High · Grades 9–12 · 5.0 mi
M
Clear Spring Middle SchoolA-
Middle · Grades 6–8 · 5.1 mi
E
Clear Spring Elementary SchoolA-
Elementary · Grades PK–5 · 5.2 mi

District: Washington County Public Schools

Neighborhood · ZIP 21711These 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.80
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 100.43

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.17%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.1%
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.1,177
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.51 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$85,632
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$102,943
Average tempThe average temperature here across a full year.53°F
Annual precipHow much rain and melted snow falls here in a typical year.40 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

12129 Rosemont Farm Ln 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 77% of homes in Washington County
  • Costs more per square foot than 96% of homes in Washington County
  • Has a bigger lot than 97% of homes in Washington County
  • Newer than 78% of homes in Big Pool 21711

What homes are worth in Big Pool 21711

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

This home
$135K$909K

This home is worth more than 75% of homes in Big Pool 21711.

How it measures up in Big Pool 21711

The dot is this home. The mark in the middle is the typical home in Big Pool 21711.

Estimated value$437,404
CheaperTypical $328,167Pricier

Pricier than 75% of homes nearby

Price per ft²$325
CheaperTypical $225Pricier

Pricier than 90% of homes nearby

Living area1,344 ft²
SmallerTypical 1,486 ft²Bigger

Bigger than 38% of homes nearby

Lot size17.48 ac
SmallerTypical 3.2 acBigger

Bigger than 85% of homes nearby

Year built1995
OlderTypical 1969Newer

Newer than 78% of homes nearby

How 12129 Rosemont Farm Ln ranks against every home in each area.
MeasureThis homeBig Pool 21711Washington County
Estimated valuepricier than$437,40475% of homes77% of homes
Price per ft²pricier than$32590% of homes96% of homes
Living areabigger than1,344 ft²38% of homes36% of homes
Lot sizebigger than17.48 ac85% of homes97% of homes
Year builtnewer than199578% of homes71% of homes

About 12129 Rosemont Farm Ln

How much is 12129 Rosemont Farm Ln, Big Pool, MD worth?

The TopHap Estimate for 12129 Rosemont Farm Ln, Big Pool, MD is $437,404 as of Aug 30, 2026. The likely range is $389,678 to $485,130. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 12129 Rosemont Farm Ln, Big Pool, MD last sell?

12129 Rosemont Farm Ln, Big Pool, MD last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 12129 Rosemont Farm Ln, Big Pool, MD?

12129 Rosemont Farm Ln, Big Pool, MD has 1.5 bathrooms, 1,344 square feet of living space and a 17.48-acre lot.

When was 12129 Rosemont Farm Ln, Big Pool, MD built?

12129 Rosemont Farm Ln, Big Pool, MD was built in 1995, making it 31 years old. The building has 1 story.

What schools serve 12129 Rosemont Farm Ln, Big Pool, MD?

12129 Rosemont Farm Ln, Big Pool, MD is assigned to Clear Spring High School (high), rated B+; Clear Spring Middle School (middle), rated A-; Clear Spring Elementary School (elementary), rated A-. All sit in Washington County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 12129 Rosemont Farm Ln, Big Pool, MD compare to other homes in Big Pool 21711?

Among the 423 homes in Big Pool 21711, it is worth more than 75% of them ($437,404 against a typical $328,167), its price per square foot is higher than 90% of them ($325 against a typical $225), it is bigger than 38% of them (1,344 ft² against a typical 1,486 ft²), its lot is bigger than 85% of them (17.48 ac against a typical 3.2 ac) and it is newer than 78% of them (1995 against a typical 1969). Measured against all of Washington County, it is worth more than 77% 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 12129 Rosemont Farm Ln, Big Pool, MD?

The 2025 property tax bill for 12129 Rosemont Farm Ln, Big Pool, MD was $2,339. The county assessed it at $316,300.

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