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Single Family ResidenceResidential
$490,157$192 / 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 Jul 14, 2026

227 FREDERICK AVE

ROCKVILLE, MD 20850
1
Baths
2,551 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.
0.18 ac
Lot SizeThe size of the land the home sits on, from county records.
1932
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$490K
$470K low$510K high
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$490,157
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$392,126

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,180 (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.$403,400 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$380,300
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$426,500

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyMONTGOMERY
Lot (acres)The size of the land the home sits on, from county records.0.18
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Radiant
CoolingThe type of cooling or air conditioning in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.Yes
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 · 90 ft²

Transaction History(4)

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
Beall Elementary SchoolB
Elementary · Grades PK–5 · 0.9 mi
H
Richard Montgomery High SchoolA-
High · Grades 9–12 · 1.1 mi
M
Julius West Middle SchoolA
Middle · Grades 6–8 · 1.5 mi

District: Montgomery County Public Schools

Neighborhood · ZIP 20850These 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.104
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.89
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.40

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.28%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.51,693
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,703 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$126,425
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$154,183
Average tempThe average temperature here across a full year.54°F
Annual precipHow much rain and melted snow falls here in a typical year.43 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.57%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Absentee owner
Company ownedWhether the owner is a company or trust rather than a person.Yes

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

227 Frederick Ave 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 78% of homes in Rockville 20850
  • Costs less per square foot than 98% of homes in Rockville
  • Bigger than 76% of homes in Rockville
  • Older than 98% of homes in Rockville

What homes are worth in Rockville 20850

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

This home
$176K$1.6M

This home is worth more than 22% of homes in Rockville 20850.

How it measures up in Rockville 20850

The dot is this home. The mark in the middle is the typical home in Rockville 20850.

Estimated value$490,157
CheaperTypical $748,010Pricier

Pricier than 22% of homes nearby

Price per ft²$192
CheaperTypical $339Pricier

Pricier than 3% of homes nearby

Living area2,551 ft²
SmallerTypical 1,995 ft²Bigger

Bigger than 69% of homes nearby

Lot size0.18 ac
SmallerTypical 0.11 acBigger

Bigger than 61% of homes nearby

Year built1932
OlderTypical 1988Newer

Newer than 2% of homes nearby

How 227 Frederick Ave ranks against every home in each area.
MeasureThis homeRockvilleRockville 20850Montgomery County
Estimated valuepricier than$490,15723% of homes22% of homes30% of homes
Price per ft²pricier than$1922% of homes3% of homes4% of homes
Living areabigger than2,551 ft²76% of homes69% of homes69% of homes
Lot sizebigger than0.18 ac60% of homes61% of homes55% of homes
Year builtnewer than19322% of homes2% of homes3% of homes

About 227 Frederick Ave

How much is 227 Frederick Ave, Rockville, MD worth?

The TopHap Estimate for 227 Frederick Ave, Rockville, MD is $490,157 as of Jul 14, 2026. The likely range is $470,406 to $509,908. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 227 Frederick Ave, Rockville, MD last sell?

227 Frederick Ave, Rockville, MD last sold on Oct 28, 2022, according to the county's recorded deed.

How big is 227 Frederick Ave, Rockville, MD?

227 Frederick Ave, Rockville, MD has 1 bathrooms, 2,551 square feet of living space and a 0.18-acre lot.

When was 227 Frederick Ave, Rockville, MD built?

227 Frederick Ave, Rockville, MD was built in 1932, making it 94 years old. The building has 1 story.

What schools serve 227 Frederick Ave, Rockville, MD?

227 Frederick Ave, Rockville, MD is assigned to Beall Elementary School (elementary), rated B; Richard Montgomery High School (high), rated A-; Julius West Middle School (middle), rated A. All sit in Montgomery County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 227 Frederick Ave, Rockville, MD compare to other homes in Rockville 20850?

Among the 13,722 homes in Rockville 20850, it is worth more than 22% of them ($490,157 against a typical $748,010), its price per square foot is higher than 3% of them ($192 against a typical $339), it is bigger than 69% of them (2,551 ft² against a typical 1,995 ft²), its lot is bigger than 61% of them (0.18 ac against a typical 0.11 ac) and it is newer than 2% of them (1932 against a typical 1988). Measured against all of Montgomery County, it is worth more than 30% 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 227 Frederick Ave, Rockville, MD?

The 2025 property tax bill for 227 Frederick Ave, Rockville, MD was $6,180. The county assessed it at $403,400.

Closest homes

More homes in Rockville 20850

Assigned schools

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