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Single Family ResidenceResidential
$599,495$245 / 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 Sep 24, 2026
Last sold for $95,414 on Jun 27, 2019

3991 FARM LN

MONROVIA, MD 21770
3.5
Baths
2,450 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.
0.51 ac
Lot SizeThe size of the land the home sits on, from county records.
1975
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

$599K
$566K low$633K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$95,414 · Jun 27, 2019

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,100 (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.$519,567 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$487,033
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$552,100

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.44
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
18
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
78
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
89
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.0.51
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.Heat Pump
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.Carport (Unspecified)
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 · 240 ft²Porch · 44 ft²

Transaction History(5)

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 · 0.6 mi
M
Windsor Knolls Middle SchoolA
Middle · Grades 6–8 · 1.8 mi
H
Urbana High SchoolA
High · Grades 9–12 · 4.7 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%

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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

3991 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 69% of homes in Frederick County
  • Has a bigger lot than 70% of homes in Frederick County
  • Older than 79% of homes in Monrovia 21770

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
$353K$1.1M

This home is worth more than 44% 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$599,495
CheaperTypical $636,284Pricier

Pricier than 44% of homes nearby

Price per ft²$245
CheaperTypical $241Pricier

Pricier than 55% of homes nearby

Living area2,450 ft²
SmallerTypical 2,680 ft²Bigger

Bigger than 41% of homes nearby

Lot size0.51 ac
SmallerTypical 0.73 acBigger

Bigger than 41% of homes nearby

Year built1975
OlderTypical 1992Newer

Newer than 21% of homes nearby

How 3991 Farm Ln ranks against every home in each area.
MeasureThis homeMonrovia 21770Frederick County
Estimated valuepricier than$599,49544% of homes69% of homes
Price per ft²pricier than$24555% of homes63% of homes
Living areabigger than2,450 ft²41% of homes60% of homes
Lot sizebigger than0.51 ac41% of homes70% of homes
Year builtnewer than197521% of homes27% of homes

About 3991 Farm Ln

How much is 3991 Farm Ln, Monrovia, MD worth?

The TopHap Estimate for 3991 Farm Ln, Monrovia, MD is $599,495 as of Sep 24, 2026. The likely range is $566,221 to $632,769. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 3991 Farm Ln, Monrovia, MD last sell?

3991 Farm Ln, Monrovia, MD last sold on Jun 27, 2019 for $95,414, according to the county's recorded deed.

How big is 3991 Farm Ln, Monrovia, MD?

3991 Farm Ln, Monrovia, MD has 3.5 bathrooms, 2,450 square feet of living space and a 0.51-acre lot.

When was 3991 Farm Ln, Monrovia, MD built?

3991 Farm Ln, Monrovia, MD was built in 1975, making it 51 years old. It is a conventional home. The building has 2 stories.

What schools serve 3991 Farm Ln, Monrovia, MD?

3991 Farm Ln, Monrovia, MD is assigned to Green Valley Elementary School (elementary), rated A; Windsor Knolls Middle School (middle), rated A; Urbana High School (high), rated A. All sit in Frederick County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 3991 Farm Ln, Monrovia, MD compare to other homes in Monrovia 21770?

Among the 2,965 homes in Monrovia 21770, it is worth more than 44% of them ($599,495 against a typical $636,284), its price per square foot is higher than 55% of them ($245 against a typical $241), it is bigger than 41% of them (2,450 ft² against a typical 2,680 ft²), its lot is bigger than 41% of them (0.51 ac against a typical 0.73 ac) and it is newer than 21% of them (1975 against a typical 1992). Measured against all of Frederick County, it is worth more than 69% 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 3991 Farm Ln, Monrovia, MD?

The 2025 property tax bill for 3991 Farm Ln, Monrovia, MD was $6,100. The county assessed it at $519,567.

More homes on Farm Ln

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