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Rural ResidenceResidential
Last sold for $3,500,000 on Oct 21, 2025

689 RIDGE RD

MOUNT AIRY, MD 21771
2
Baths
1,920 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.
179.25 ac
Lot SizeThe size of the land the home sits on, from county records.
1890
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$3,500,000 · Oct 21, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,818 (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.$444,900 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$410,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$513,700

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.31 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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.minimal

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Rural Residence
CountyHOWARD
Lot (acres)The size of the land the home sits on, from county records.179.25
RoofThe main material covering the roof, such as asphalt shingle or tile.Metal
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
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.Shed · 1,960 ft²Porch · 685 ft²

Transaction History(6)

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
Lisbon Elementary SchoolA
Elementary · Grades KG–5 · 5.3 mi
M
Glenwood Middle SchoolA
Middle · Grades 6–8 · 8.3 mi
H
Glenelg High SchoolA+
High · Grades 9–12 · 10.1 mi

District: Howard County Public Schools

Neighborhood · ZIP 21771These 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.59
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.82
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.29%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.1%
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.32,505
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.382 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$151,406
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$162,296
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%

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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

689 Ridge 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.

  • Among the largest lots in Mount Airy 21771
  • Among the oldest homes in Howard County

How it measures up in Mount Airy 21771

The dot is this home. The mark in the middle is the typical home in Mount Airy 21771.

Living area1,920 ft²
SmallerTypical 2,184 ft²Bigger

Bigger than 39% of homes nearby

Lot size179.25 ac
SmallerTypical 0.95 acBigger

Bigger than almost all homes nearby

Year built1890
OlderTypical 1988Newer

Older than almost all homes nearby

How 689 Ridge Rd ranks against every home in each area.
MeasureThis homeMount Airy 21771Howard County
Living areabigger than1,920 ft²39% of homes45% of homes
Lot sizebigger than179.25 acalmost all homesalmost all homes
Year builtnewer than1890almost no homesalmost no homes

About 689 Ridge Rd

When did 689 Ridge Rd, Mount Airy, MD last sell?

689 Ridge Rd, Mount Airy, MD last sold on Oct 21, 2025 for $3,500,000, according to the county's recorded deed.

How big is 689 Ridge Rd, Mount Airy, MD?

689 Ridge Rd, Mount Airy, MD has 2 bathrooms, 1,920 square feet of living space and a 179.25-acre lot.

When was 689 Ridge Rd, Mount Airy, MD built?

689 Ridge Rd, Mount Airy, MD was built in 1890, making it 136 years old. The building has 2 stories.

What schools serve 689 Ridge Rd, Mount Airy, MD?

689 Ridge Rd, Mount Airy, MD is assigned to Lisbon Elementary School (elementary), rated A; Glenwood 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 689 Ridge Rd, Mount Airy, MD compare to other homes in Mount Airy 21771?

Among the 10,754 homes in Mount Airy 21771, it is bigger than 39% of them (1,920 ft² against a typical 2,184 ft²), its lot is bigger than almost all of them (179.25 ac against a typical 0.95 ac) and it is newer than almost none of them (1890 against a typical 1988). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 689 Ridge Rd, Mount Airy, MD?

The 2026 property tax bill for 689 Ridge Rd, Mount Airy, MD was $1,818. The county assessed it at $444,900.

More homes on Ridge Rd

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More homes in Mount Airy 21771

Assigned schools

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