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Single Family ResidenceResidential
$1,140,172$354 / 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 95How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026
Last sold for $680,000 on Feb 6, 2020

3442 ROSEMARY LN

ELLICOTT CITY, MD 21042
4.5
Baths
3,217 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.
5.04 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.
3
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.1M
$1.1M low$1.2M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$680,000 · Feb 6, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$13,982 (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.$978,033 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$940,467
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,015,600

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.5.04
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.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.Mixed
PoolWhether the property has a pool, and what kind, such as in-ground.Yes
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck · 360 ft²Shed · 216 ft²Patio · 170 ft²Porch · 828 ft²

Transaction History(1)

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
Triadelphia Ridge Elementary SchoolA+
Elementary · Grades PK–5 · 1.4 mi
M
Folly Quarter Middle SchoolA+
Middle · Grades 6–8 · 1.6 mi
H
Glenelg High SchoolA-
High · Grades 9–12 · 2.3 mi

District: Howard County Public Schools

Neighborhood · ZIP 21042These 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.48
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.85
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.37

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.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.9%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.43,959
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,188 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$168,351
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$201,624
Average tempThe average temperature here across a full year.54°F
Annual precipHow much rain and melted snow falls here in a typical year.45 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

3442 Rosemary 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 91% of homes in Howard County
  • Costs more per square foot than 80% of homes in Howard County
  • Bigger than 85% of homes in Howard County
  • Has a bigger lot than 98% of homes in Ellicott City 21042
  • Older than 73% of homes in Howard County

What homes are worth in Ellicott City 21042

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

This home
$346K$1.9M

This home is worth more than 85% of homes in Ellicott City 21042.

How it measures up in Ellicott City 21042

The dot is this home. The mark in the middle is the typical home in Ellicott City 21042.

Estimated value$1,140,172
CheaperTypical $782,803Pricier

Pricier than 85% of homes nearby

Price per ft²$354
CheaperTypical $324Pricier

Pricier than 72% of homes nearby

Living area3,217 ft²
SmallerTypical 2,428 ft²Bigger

Bigger than 77% of homes nearby

Lot size5.04 ac
SmallerTypical 0.47 acBigger

Bigger than 98% of homes nearby

Year built1978
OlderTypical 1987Newer

Newer than 31% of homes nearby

How 3442 Rosemary Ln ranks against every home in each area.
MeasureThis homeEllicott City 21042Howard County
Estimated valuepricier than$1,140,17285% of homes91% of homes
Price per ft²pricier than$35472% of homes80% of homes
Living areabigger than3,217 ft²77% of homes85% of homes
Lot sizebigger than5.04 ac98% of homes94% of homes
Year builtnewer than197831% of homes27% of homes

About 3442 Rosemary Ln

How much is 3442 Rosemary Ln, Ellicott City, MD worth?

The TopHap Estimate for 3442 Rosemary Ln, Ellicott City, MD is $1,140,172 as of Oct 21, 2026. The likely range is $1,088,726 to $1,191,618. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 3442 Rosemary Ln, Ellicott City, MD last sell?

3442 Rosemary Ln, Ellicott City, MD last sold on Feb 6, 2020 for $680,000, according to the county's recorded deed.

How big is 3442 Rosemary Ln, Ellicott City, MD?

3442 Rosemary Ln, Ellicott City, MD has 4.5 bathrooms, 3,217 square feet of living space and a 5.04-acre lot.

When was 3442 Rosemary Ln, Ellicott City, MD built?

3442 Rosemary Ln, Ellicott City, MD was built in 1978, making it 48 years old. The building has 2 stories.

What schools serve 3442 Rosemary Ln, Ellicott City, MD?

3442 Rosemary Ln, Ellicott City, MD is assigned to Triadelphia Ridge Elementary School (elementary), rated A+; Folly Quarter Middle School (middle), rated A+; Glenelg High School (high), rated A-. All sit in Howard County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 3442 Rosemary Ln, Ellicott City, MD compare to other homes in Ellicott City 21042?

Among the 14,376 homes in Ellicott City 21042, it is worth more than 85% of them ($1,140,172 against a typical $782,803), its price per square foot is higher than 72% of them ($354 against a typical $324), it is bigger than 77% of them (3,217 ft² against a typical 2,428 ft²), its lot is bigger than 98% of them (5.04 ac against a typical 0.47 ac) and it is newer than 31% of them (1978 against a typical 1987). Measured against all of Howard County, it is worth more than 91% 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 3442 Rosemary Ln, Ellicott City, MD?

The 2026 property tax bill for 3442 Rosemary Ln, Ellicott City, MD was $13,982. The county assessed it at $978,033.

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Assigned schools

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