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Single Family ResidenceResidential
$71,337$82 / 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 93How 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 $51,500 on May 17, 2012

15817 ROCKVILLE ST SW

LONACONING, MD 21539
1
Baths
874 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.
0.32 ac
Lot SizeThe size of the land the home sits on, from county records.
1948
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$71K
$67K low$76K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$51,500 · May 17, 2012

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$723 (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.$68,367 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$59,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$85,300

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.63
97
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
11
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
68
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
93
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
48
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.110 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.0.2 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
CountyALLEGANY
Lot (acres)The size of the land the home sits on, from county records.0.32
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Electric
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.Porch · 338 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
George's Creek Elementary SchoolC
Elementary · Grades PK–5 · 0.6 mi
M
Westmar Middle SchoolC
Middle · Grades 6–8 · 1.2 mi
H
Mountain Ridge High SchoolB
High · Grades 9–12 · 6.1 mi

District: Allegany County Public Schools

Neighborhood · ZIP 21539These 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.129
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.84
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.34

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.84%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.9.2%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.18%
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.2,363
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.69 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$56,411
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$68,156
Average tempThe average temperature here across a full year.49°F
Annual precipHow much rain and melted snow falls here in a typical year.42 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

15817 Rockville St Sw 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 less than 87% of homes in Allegany County
  • Costs less per square foot than 70% of homes in Allegany County
  • Smaller than 95% of homes in Lonaconing 21539

What homes are worth in Lonaconing 21539

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

This home
$28K$524K

This home is worth more than 26% of homes in Lonaconing 21539.

How it measures up in Lonaconing 21539

The dot is this home. The mark in the middle is the typical home in Lonaconing 21539.

Estimated value$71,337
CheaperTypical $103,310Pricier

Pricier than 26% of homes nearby

Price per ft²$82
CheaperTypical $70Pricier

Pricier than 60% of homes nearby

Living area874 ft²
SmallerTypical 1,560 ft²Bigger

Bigger than 5% of homes nearby

Lot size0.32 ac
SmallerTypical 0.34 acBigger

Bigger than 48% of homes nearby

Year built1948
OlderTypical 1925Newer

Newer than 60% of homes nearby

How 15817 Rockville St Sw ranks against every home in each area.
MeasureThis homeLonaconing 21539Allegany County
Estimated valuepricier than$71,33726% of homes13% of homes
Price per ft²pricier than$8260% of homes30% of homes
Living areabigger than874 ft²5% of homes7% of homes
Lot sizebigger than0.32 ac48% of homes54% of homes
Year builtnewer than194860% of homes51% of homes

About 15817 Rockville St Sw

How much is 15817 Rockville St Sw, Lonaconing, MD worth?

The TopHap Estimate for 15817 Rockville St Sw, Lonaconing, MD is $71,337 as of Sep 24, 2026. The likely range is $66,532 to $76,142. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 15817 Rockville St Sw, Lonaconing, MD last sell?

15817 Rockville St Sw, Lonaconing, MD last sold on May 17, 2012 for $51,500, according to the county's recorded deed.

How big is 15817 Rockville St Sw, Lonaconing, MD?

15817 Rockville St Sw, Lonaconing, MD has 1 bathrooms, 874 square feet of living space and a 0.32-acre lot.

When was 15817 Rockville St Sw, Lonaconing, MD built?

15817 Rockville St Sw, Lonaconing, MD was built in 1948, making it 78 years old. The building has 1 story.

What schools serve 15817 Rockville St Sw, Lonaconing, MD?

15817 Rockville St Sw, Lonaconing, MD is assigned to George's Creek Elementary School (elementary), rated C; Westmar Middle School (middle), rated C; Mountain Ridge High School (high), rated B. All sit in Allegany County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 15817 Rockville St Sw, Lonaconing, MD compare to other homes in Lonaconing 21539?

Among the 1,084 homes in Lonaconing 21539, it is worth more than 26% of them ($71,337 against a typical $103,310), its price per square foot is higher than 60% of them ($82 against a typical $70), it is bigger than 5% of them (874 ft² against a typical 1,560 ft²), its lot is bigger than 48% of them (0.32 ac against a typical 0.34 ac) and it is newer than 60% of them (1948 against a typical 1925). Measured against all of Allegany County, it is worth more than 13% 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 15817 Rockville St Sw, Lonaconing, MD?

The 2025 property tax bill for 15817 Rockville St Sw, Lonaconing, MD was $723. The county assessed it at $68,367.

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