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Single Family ResidenceResidential
$832,830$248 / 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 97How 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 $660,250 on Sep 22, 2021

15321 DELPHINIUM LN

ROCKVILLE, MD 20853
2.5
Baths
3,363 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.
0.37 ac
Lot SizeThe size of the land the home sits on, from county records.
1966
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$833K
$806K low$860K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$660,250 · Sep 22, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,431 (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.$734,900 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$672,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$860,700

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.Bi-Level
CountyMONTGOMERY
Lot (acres)The size of the land the home sits on, from county records.0.38
ConstructionThe main material the home's frame and walls are built from.Brick
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Yes
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.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No

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.

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

E
Flower Valley Elementary SchoolC+
Elementary · Grades KG–5 · 0.2 mi
M
Earle B. Wood Middle SchoolB-
Middle · Grades 6–8 · 1.2 mi
H
Rockville High SchoolB-
High · Grades 9–12 · 1.9 mi

District: Montgomery County Public Schools

Neighborhood · ZIP 20853These 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.60
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.90
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.38

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.27%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.7%
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.30,497
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,373 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$145,074
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$169,691
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%

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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

15321 Delphinium 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 79% of homes in Rockville 20853
  • Costs less per square foot than 85% of homes in Rockville 20853
  • Bigger than 88% of homes in Rockville 20853
  • Has a bigger lot than 84% of homes in Montgomery County
  • Older than 68% of homes in Montgomery County

What homes are worth in Rockville 20853

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

This home
$232K$1.2M

This home is worth more than 79% of homes in Rockville 20853.

How it measures up in Rockville 20853

The dot is this home. The mark in the middle is the typical home in Rockville 20853.

Estimated value$832,830
CheaperTypical $639,916Pricier

Pricier than 79% of homes nearby

Price per ft²$248
CheaperTypical $303Pricier

Pricier than 15% of homes nearby

Living area3,363 ft²
SmallerTypical 2,050 ft²Bigger

Bigger than 88% of homes nearby

Lot size0.37 ac
SmallerTypical 0.23 acBigger

Bigger than 78% of homes nearby

Year built1966
OlderTypical 1965Newer

Newer than 61% of homes nearby

How 15321 Delphinium Ln ranks against every home in each area.
MeasureThis homeRockville 20853Montgomery County
Estimated valuepricier than$832,83079% of homes70% of homes
Price per ft²pricier than$24815% of homes23% of homes
Living areabigger than3,363 ft²88% of homes83% of homes
Lot sizebigger than0.37 ac78% of homes84% of homes
Year builtnewer than196661% of homes32% of homes

About 15321 Delphinium Ln

How much is 15321 Delphinium Ln, Rockville, MD worth?

The TopHap Estimate for 15321 Delphinium Ln, Rockville, MD is $832,830 as of Sep 24, 2026. The likely range is $805,893 to $859,767. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 15321 Delphinium Ln, Rockville, MD last sell?

15321 Delphinium Ln, Rockville, MD last sold on Sep 22, 2021 for $660,250, according to the county's recorded deed.

How big is 15321 Delphinium Ln, Rockville, MD?

15321 Delphinium Ln, Rockville, MD has 2.5 bathrooms, 3,363 square feet of living space and a 0.38-acre lot.

When was 15321 Delphinium Ln, Rockville, MD built?

15321 Delphinium Ln, Rockville, MD was built in 1966, making it 60 years old. It is a bi-level home. The building has 2 stories.

What schools serve 15321 Delphinium Ln, Rockville, MD?

15321 Delphinium Ln, Rockville, MD is assigned to Flower Valley Elementary School (elementary), rated C+; Earle B. Wood Middle School (middle), rated B-; Rockville High School (high), rated B-. All sit in Montgomery County Public Schools. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 15321 Delphinium Ln, Rockville, MD compare to other homes in Rockville 20853?

Among the 9,294 homes in Rockville 20853, it is worth more than 79% of them ($832,830 against a typical $639,916), its price per square foot is higher than 15% of them ($248 against a typical $303), it is bigger than 88% of them (3,363 ft² against a typical 2,050 ft²), its lot is bigger than 78% of them (0.37 ac against a typical 0.23 ac) and it is newer than 61% of them (1966 against a typical 1965). Measured against all of Montgomery County, it is worth more than 70% 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 15321 Delphinium Ln, Rockville, MD?

The 2025 property tax bill for 15321 Delphinium Ln, Rockville, MD was $8,431. The county assessed it at $734,900.

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