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Single Family ResidenceResidential
$401,861$244 / 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 Jul 14, 2026
Last sold for $249,900 on Apr 18, 2019

10055 LONGS MILL RD

ROCKY RIDGE, MD 21778
1.5
Baths
1,644 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.
0.56 ac
Lot SizeThe size of the land the home sits on, from county records.
1915
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

$402K
$376K low$427K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$249,900 · Apr 18, 2019
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$159,361
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$127,489
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.64%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$242,500
AMERICAN INTERNET MORTGAGE INC · recorded Feb 22, 2022

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,964 (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.$342,900 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$62,800
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$280,100
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$312,233
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$342,900

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.41
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
6
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
77
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
88
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
37
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.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Conventional
CountyFREDERICK
Lot (acres)The size of the land the home sits on, from county records.0.56
RoofThe main material covering the roof, such as asphalt shingle or tile.Metal
HeatingThe type of heating system in the home.Yes
CoolingThe type of cooling or air conditioning in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
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.Patio · 400 ft²Porch · 348 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.

E
Thurmont Primary School
Elementary · Grades KG–2 · 3.9 mi
M
Thurmont Middle SchoolC-
Middle · Grades 6–8 · 4.7 mi
H
Catoctin High SchoolB-
High · Grades 9–12 · 5.4 mi

District: Frederick County Public Schools

Neighborhood · ZIP 21778These 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.106
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.77
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.39

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.93%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.11%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.9%
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.1,439
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.80 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$81,802
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$112,057
Average tempThe average temperature here across a full year.53°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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

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

10055 Longs Mill 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 70% of homes in Frederick County
  • Smaller than 74% of homes in Frederick County
  • Has a smaller lot than 91% of homes in Rocky Ridge 21778
  • Older than 89% of homes in Frederick County

What homes are worth in Rocky Ridge 21778

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

This home
$168K$1.2M

This home is worth more than 44% of homes in Rocky Ridge 21778.

How it measures up in Rocky Ridge 21778

The dot is this home. The mark in the middle is the typical home in Rocky Ridge 21778.

Estimated value$401,861
CheaperTypical $432,780Pricier

Pricier than 44% of homes nearby

Price per ft²$244
CheaperTypical $247Pricier

Pricier than 47% of homes nearby

Living area1,644 ft²
SmallerTypical 1,729 ft²Bigger

Bigger than 45% of homes nearby

Lot size0.56 ac
SmallerTypical 3 acBigger

Bigger than 9% of homes nearby

Year built1915
OlderTypical 1962Newer

Newer than 34% of homes nearby

How 10055 Longs Mill Rd ranks against every home in each area.
MeasureThis homeRocky Ridge 21778Frederick County
Estimated valuepricier than$401,86144% of homes30% of homes
Price per ft²pricier than$24447% of homes62% of homes
Living areabigger than1,644 ft²45% of homes26% of homes
Lot sizebigger than0.56 ac9% of homes71% of homes
Year builtnewer than191534% of homes11% of homes

About 10055 Longs Mill Rd

How much is 10055 Longs Mill Rd, Rocky Ridge, MD worth?

The TopHap Estimate for 10055 Longs Mill Rd, Rocky Ridge, MD is $401,861 as of Jul 14, 2026. The likely range is $376,470 to $427,252. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 10055 Longs Mill Rd, Rocky Ridge, MD last sell?

10055 Longs Mill Rd, Rocky Ridge, MD last sold on Apr 18, 2019 for $249,900, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 10055 Longs Mill Rd, Rocky Ridge, MD?

10055 Longs Mill Rd, Rocky Ridge, MD has 1.5 bathrooms, 1,644 square feet of living space and a 0.56-acre lot.

When was 10055 Longs Mill Rd, Rocky Ridge, MD built?

10055 Longs Mill Rd, Rocky Ridge, MD was built in 1915, making it 111 years old. It is a conventional home. The building has 2 stories.

What schools serve 10055 Longs Mill Rd, Rocky Ridge, MD?

10055 Longs Mill Rd, Rocky Ridge, MD is assigned to Thurmont Primary School (elementary); Thurmont Middle School (middle), rated C-; Catoctin High School (high), rated B-. All sit in Frederick County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 10055 Longs Mill Rd, Rocky Ridge, MD compare to other homes in Rocky Ridge 21778?

Among the 437 homes in Rocky Ridge 21778, it is worth more than 44% of them ($401,861 against a typical $432,780), its price per square foot is higher than 47% of them ($244 against a typical $247), it is bigger than 45% of them (1,644 ft² against a typical 1,729 ft²), its lot is bigger than 9% of them (0.56 ac against a typical 3 ac) and it is newer than 34% of them (1915 against a typical 1962). Measured against all of Frederick County, it is worth more than 30% 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 10055 Longs Mill Rd, Rocky Ridge, MD?

The 2025 property tax bill for 10055 Longs Mill Rd, Rocky Ridge, MD was $3,964. The county assessed it at $342,900.

Closest homes

More homes in Rocky Ridge 21778

Assigned schools

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