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Single Family ResidenceResidential
$316,520$226 / 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 Sep 24, 2026
Last sold for $131,250 on Aug 28, 2014

421 ARMSTRONG AVE

WILMINGTON, DE 19805
3
Beds
2 / 1
Baths
1,400 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.
0.23 ac
Lot SizeThe size of the land the home sits on, from county records.
1935
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$317K
$303K low$330K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$131,250 · Aug 28, 2014

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,786 (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.$311,400 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$50,000

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.43
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
4
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
73
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
89
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
49
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.

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
StyleThe architectural style of the home, such as ranch or colonial.Cape Cod
CountyNew Castle
Lot (acres)The size of the land the home sits on, from county records.0.23
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Forced Air
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, Detached

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
Marbrook Elementary SchoolA-
Elementary · Grades KG–5 · 0.2 mi
M
Stanton Middle SchoolF
Middle · Grades 6–8 · 2.5 mi
H
McKean (Thomas) High SchoolD-
High · Grades 9–12 · 2.6 mi

District: Red Clay Consolidated School District

Neighborhood · ZIP 19805These 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.135
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.96
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.78

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.92%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.18%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.17%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.38,894
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.7,112 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$63,972
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$81,664
Average tempThe average temperature here across a full year.54°F
Annual precipHow much rain and melted snow falls here in a typical year.46 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.70%

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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

421 Armstrong 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 more than 80% of homes in Wilmington 19805
  • Costs more per square foot than 76% of homes in Wilmington 19805
  • Smaller than 67% of homes in New Castle County
  • Has a bigger lot than 95% of homes in Wilmington 19805
  • Older than 87% of homes in New Castle County

What homes are worth in Wilmington 19805

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

This home
$97K$504K

This home is worth more than 80% of homes in Wilmington 19805.

How it measures up in Wilmington 19805

The dot is this home. The mark in the middle is the typical home in Wilmington 19805.

Estimated value$316,520
CheaperTypical $227,905Pricier

Pricier than 80% of homes nearby

Price per ft²$226
CheaperTypical $180Pricier

Pricier than 76% of homes nearby

Living area1,400 ft²
SmallerTypical 1,260 ft²Bigger

Bigger than 65% of homes nearby

Lot size0.23 ac
SmallerTypical 2,178 ft²Bigger

Bigger than 95% of homes nearby

Year built1935
OlderTypical 1940Newer

Newer than 49% of homes nearby

How 421 Armstrong Ave ranks against every home in each area.
MeasureThis homeWilmington 19805New Castle County
Estimated valuepricier than$316,52080% of homes33% of homes
Price per ft²pricier than$22676% of homes56% of homes
Living areabigger than1,400 ft²65% of homes33% of homes
Lot sizebigger than0.23 ac95% of homes62% of homes
Year builtnewer than193549% of homes13% of homes

About 421 Armstrong Ave

How much is 421 Armstrong Ave, Wilmington, DE worth?

The TopHap Estimate for 421 Armstrong Ave, Wilmington, DE is $316,520 as of Sep 24, 2026. The likely range is $302,827 to $330,213. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 421 Armstrong Ave, Wilmington, DE last sell?

421 Armstrong Ave, Wilmington, DE last sold on Aug 28, 2014 for $131,250, according to the county's recorded deed.

How big is 421 Armstrong Ave, Wilmington, DE?

421 Armstrong Ave, Wilmington, DE has 3 bedrooms, 2 bathrooms, 1,400 square feet of living space and a 0.23-acre lot.

When was 421 Armstrong Ave, Wilmington, DE built?

421 Armstrong Ave, Wilmington, DE was built in 1935, making it 91 years old. It is a cape cod home. The building has 1 story.

What schools serve 421 Armstrong Ave, Wilmington, DE?

421 Armstrong Ave, Wilmington, DE is assigned to Marbrook Elementary School (elementary), rated A-; Stanton Middle School (middle), rated F; McKean (Thomas) High School (high), rated D-. All sit in Red Clay Consolidated School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 421 Armstrong Ave, Wilmington, DE compare to other homes in Wilmington 19805?

Among the 13,339 homes in Wilmington 19805, it is worth more than 80% of them ($316,520 against a typical $227,905), its price per square foot is higher than 76% of them ($226 against a typical $180), it is bigger than 65% of them (1,400 ft² against a typical 1,260 ft²), its lot is bigger than 95% of them (0.23 ac against a typical 2,178 ft²) and it is newer than 49% of them (1935 against a typical 1940). Measured against all of New Castle County, it is worth more than 33% 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 421 Armstrong Ave, Wilmington, DE?

The 2025 property tax bill for 421 Armstrong Ave, Wilmington, DE was $2,786. The county assessed it at $311,400.

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