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Single Family ResidenceResidential
$814,988$215 / 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 96How 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 $760,000 on Nov 15, 2022

4391 SHAMROCK DR

MONROVIA, MD 21770
3.5
Baths
3,794 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.
0.16 ac
Lot SizeThe size of the land the home sits on, from county records.
2016
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$815K
$783K low$847K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$760,000 · Nov 15, 2022

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,575 (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.$748,767 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$704,633
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$792,900

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.42
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
8
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
79
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
87
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
CountyFREDERICK
Lot (acres)The size of the land the home sits on, from county records.0.16
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.Yes
CoolingThe type of cooling or air conditioning in the home.Central
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.Deck · 192 ft²Patio · 210 ft²Porch · 30 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
Green Valley Elementary SchoolA+
Elementary · Grades KG–5 · 1.4 mi
M
Windsor Knolls Middle SchoolA-
Middle · Grades 6–8 · 2.2 mi
H
Linganore High SchoolB
High · Grades 9–12 · 5.9 mi

District: Frederick County Public Schools

Neighborhood · ZIP 21770These 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.22
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.79
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.98%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.1.5%
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.6,240
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.567 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$161,575
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$180,267
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%

Owner Tools

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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

4391 Shamrock Dr 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 Frederick County
  • Costs less per square foot than 79% of homes in Monrovia 21770
  • Bigger than 89% of homes in Frederick County
  • Has a smaller lot than 80% of homes in Monrovia 21770
  • Newer than 86% of homes in Frederick County

What homes are worth in Monrovia 21770

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

This home
$372K$1.1M

This home is worth more than 73% of homes in Monrovia 21770.

How it measures up in Monrovia 21770

The dot is this home. The mark in the middle is the typical home in Monrovia 21770.

Estimated value$814,988
CheaperTypical $641,743Pricier

Pricier than 73% of homes nearby

Price per ft²$215
CheaperTypical $242Pricier

Pricier than 21% of homes nearby

Living area3,794 ft²
SmallerTypical 2,680 ft²Bigger

Bigger than 77% of homes nearby

Lot size0.16 ac
SmallerTypical 0.76 acBigger

Bigger than 20% of homes nearby

Year built2016
OlderTypical 1992Newer

Newer than 66% of homes nearby

How 4391 Shamrock Dr ranks against every home in each area.
MeasureThis homeMonrovia 21770Frederick County
Estimated valuepricier than$814,98873% of homes91% of homes
Price per ft²pricier than$21521% of homes39% of homes
Living areabigger than3,794 ft²77% of homes89% of homes
Lot sizebigger than0.16 ac20% of homes39% of homes
Year builtnewer than201666% of homes86% of homes

About 4391 Shamrock Dr

How much is 4391 Shamrock Dr, Monrovia, MD worth?

The TopHap Estimate for 4391 Shamrock Dr, Monrovia, MD is $814,988 as of Aug 30, 2026. The likely range is $783,356 to $846,620. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4391 Shamrock Dr, Monrovia, MD last sell?

4391 Shamrock Dr, Monrovia, MD last sold on Nov 15, 2022 for $760,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 4391 Shamrock Dr, Monrovia, MD?

4391 Shamrock Dr, Monrovia, MD has 3.5 bathrooms, 3,794 square feet of living space and a 0.16-acre lot.

When was 4391 Shamrock Dr, Monrovia, MD built?

4391 Shamrock Dr, Monrovia, MD was built in 2016, making it 10 years old. The building has 2 stories.

What schools serve 4391 Shamrock Dr, Monrovia, MD?

4391 Shamrock Dr, Monrovia, MD is assigned to Green Valley Elementary School (elementary), rated A+; Windsor Knolls Middle School (middle), rated A-; Linganore 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 4391 Shamrock Dr, Monrovia, MD compare to other homes in Monrovia 21770?

Among the 2,965 homes in Monrovia 21770, it is worth more than 73% of them ($814,988 against a typical $641,743), its price per square foot is higher than 21% of them ($215 against a typical $242), it is bigger than 77% of them (3,794 ft² against a typical 2,680 ft²), its lot is bigger than 20% of them (0.16 ac against a typical 0.76 ac) and it is newer than 66% of them (2016 against a typical 1992). Measured against all of Frederick 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 4391 Shamrock Dr, Monrovia, MD?

The 2025 property tax bill for 4391 Shamrock Dr, Monrovia, MD was $8,575. The county assessed it at $748,767.

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