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Single Family ResidenceResidential
$621,210$258 / 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 Sep 24, 2026
Last sold for $359,900 on Aug 5, 2020

309 ROLLING KNOLL DR

BEL AIR, MD 21014
3.5
Baths
2,408 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.
1.95 ac
Lot SizeThe size of the land the home sits on, from county records.
1986
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
4
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$621K
$590K low$653K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$359,900 · Aug 5, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,815 (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.$533,567 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$521,600
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$557,500

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.127 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.1 percent flood zone

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
CountyHARFORD
Lot (acres)The size of the land the home sits on, from county records.1.95
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.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, 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 · 684 ft²Patio · 300 ft²Porch · 132 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.

Foreclosure Filings(3)

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

M
Patterson Mill Middle SchoolA-
Middle · Grades 6–8 · 0.9 mi
H
Patterson Mill High SchoolB
High · Grades 9–12 · 0.9 mi
E
Ring Factory Elementary SchoolA
Elementary · Grades PK–5 · 1.1 mi

District: Harford County Public Schools

Neighborhood · ZIP 21014These 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.93
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 100.55

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.26%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.5%
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.38,636
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,732 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$117,745
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$128,331
Average tempThe average temperature here across a full year.55°F
Annual precipHow much rain and melted snow falls here in a typical year.48 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

309 Rolling Knoll 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 84% of homes in Bel Air 21014
  • Costs more per square foot than 66% of homes in Harford County
  • Bigger than 81% of homes in Bel Air 21014
  • Has a bigger lot than 98% of homes in Bel Air 21014

What homes are worth in Bel Air 21014

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

This home
$172K$779K

This home is worth more than 84% of homes in Bel Air 21014.

How it measures up in Bel Air 21014

The dot is this home. The mark in the middle is the typical home in Bel Air 21014.

Estimated value$621,210
CheaperTypical $452,880Pricier

Pricier than 84% of homes nearby

Price per ft²$258
CheaperTypical $250Pricier

Pricier than 59% of homes nearby

Living area2,408 ft²
SmallerTypical 1,749 ft²Bigger

Bigger than 81% of homes nearby

Lot size1.95 ac
SmallerTypical 0.27 acBigger

Bigger than 98% of homes nearby

Year built1986
OlderTypical 1987Newer

Newer than 46% of homes nearby

How 309 Rolling Knoll Dr ranks against every home in each area.
MeasureThis homeBel Air 21014Harford County
Estimated valuepricier than$621,21084% of homes84% of homes
Price per ft²pricier than$25859% of homes66% of homes
Living areabigger than2,408 ft²81% of homes79% of homes
Lot sizebigger than1.95 ac98% of homes86% of homes
Year builtnewer than198646% of homes45% of homes

About 309 Rolling Knoll Dr

How much is 309 Rolling Knoll Dr, Bel Air, MD worth?

The TopHap Estimate for 309 Rolling Knoll Dr, Bel Air, MD is $621,210 as of Sep 24, 2026. The likely range is $589,840 to $652,579. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 309 Rolling Knoll Dr, Bel Air, MD last sell?

309 Rolling Knoll Dr, Bel Air, MD last sold on Aug 5, 2020 for $359,900, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 309 Rolling Knoll Dr, Bel Air, MD?

309 Rolling Knoll Dr, Bel Air, MD has 3.5 bathrooms, 2,408 square feet of living space and a 1.95-acre lot.

When was 309 Rolling Knoll Dr, Bel Air, MD built?

309 Rolling Knoll Dr, Bel Air, MD was built in 1986, making it 40 years old. The building has 2 stories.

What schools serve 309 Rolling Knoll Dr, Bel Air, MD?

309 Rolling Knoll Dr, Bel Air, MD is assigned to Patterson Mill Middle School (middle), rated A-; Patterson Mill High School (high), rated B; Ring Factory Elementary School (elementary), rated A. All sit in Harford County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 309 Rolling Knoll Dr, Bel Air, MD compare to other homes in Bel Air 21014?

Among the 13,318 homes in Bel Air 21014, it is worth more than 84% of them ($621,210 against a typical $452,880), its price per square foot is higher than 59% of them ($258 against a typical $250), it is bigger than 81% of them (2,408 ft² against a typical 1,749 ft²), its lot is bigger than 98% of them (1.95 ac against a typical 0.27 ac) and it is newer than 46% of them (1986 against a typical 1987). Measured against all of Harford County, it is worth more than 84% 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 309 Rolling Knoll Dr, Bel Air, MD?

The 2026 property tax bill for 309 Rolling Knoll Dr, Bel Air, MD was $5,815. The county assessed it at $533,567.

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