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Single Family ResidenceResidential
$1,040,957$845 / 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 94How 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 $600,000 on Jan 30, 2017

3870 ARMSTRONG ST

SAN DIEGO, CA 92111
3
Beds
2
Baths
1,232 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.
0.13 ac
Lot SizeThe size of the land the home sits on, from county records.
1959
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$1M
$980K low$1.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$600,000 · Jan 30, 2017

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,272 (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.$710,270 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$571,308
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$138,962
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$696,344

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.27
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
1
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
36
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
11
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
87
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
CountySAN DIEGO
Lot (acres)The size of the land the home sits on, from county records.0.13
GarageWhether the property has a garage, and details like whether it is attached to the home.Carport (Unspecified)
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(3)

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
Ross Elementary SchoolB-
Elementary · Grades KG–5 · 0.2 mi
H
Kearny High School of Digital Media and DesignB
High · Grades 9–12 · 1.0 mi
M
Montgomery Middle SchoolC-
Middle · Grades 6–8 · 1.8 mi

District: San Diego City Unified School District

Neighborhood · ZIP 92111These 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.100
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.107
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.353

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.27%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.11%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.48,978
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,649 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$84,250
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$111,764
Average tempThe average temperature here across a full year.62°F
Annual precipHow much rain and melted snow falls here in a typical year.12 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.68%

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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

3870 Armstrong St 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 San Diego 92111
  • Costs more per square foot than 96% of homes in San Diego 92111
  • Smaller than 67% of homes in San Diego County
  • Has a smaller lot than 92% of homes in Clairemont Mesa
  • Older than 87% of homes in San Diego County

What homes are worth in San Diego 92111

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

This home
$363K$1.4M

This home is worth more than 80% of homes in San Diego 92111.

How it measures up in San Diego 92111

The dot is this home. The mark in the middle is the typical home in San Diego 92111.

Estimated value$1,040,957
CheaperTypical $874,228Pricier

Pricier than 80% of homes nearby

Price per ft²$845
CheaperTypical $620Pricier

Pricier than 96% of homes nearby

Living area1,232 ft²
SmallerTypical 1,344 ft²Bigger

Bigger than 37% of homes nearby

Lot size0.13 ac
SmallerTypical 0.19 acBigger

Bigger than 12% of homes nearby

Year built1959
OlderTypical 1967Newer

Newer than 23% of homes nearby

How 3870 Armstrong St ranks against every home in each area.
MeasureThis homeClairemont MesaSan Diego 92111San Diego County
Estimated valuepricier than$1,040,95757% of homes80% of homes62% of homes
Price per ft²pricier than$84585% of homes96% of homes87% of homes
Living areabigger than1,232 ft²34% of homes37% of homes33% of homes
Lot sizebigger than0.13 ac8% of homes12% of homes16% of homes
Year builtnewer than195936% of homes23% of homes13% of homes

About 3870 Armstrong St

How much is 3870 Armstrong St, San Diego, CA worth?

The TopHap Estimate for 3870 Armstrong St, San Diego, CA is $1,040,957 as of Sep 24, 2026. The likely range is $980,116 to $1,101,798. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 3870 Armstrong St, San Diego, CA last sell?

3870 Armstrong St, San Diego, CA last sold on Jan 30, 2017 for $600,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 3870 Armstrong St, San Diego, CA?

3870 Armstrong St, San Diego, CA has 3 bedrooms, 2 bathrooms, 1,232 square feet of living space and a 0.13-acre lot.

When was 3870 Armstrong St, San Diego, CA built?

3870 Armstrong St, San Diego, CA was built in 1959, making it 67 years old. The building has 1 story.

What schools serve 3870 Armstrong St, San Diego, CA?

3870 Armstrong St, San Diego, CA is assigned to Ross Elementary School (elementary), rated B-; Kearny High School of Digital Media and Design (high), rated B; Montgomery Middle School (middle), rated C-. All sit in San Diego City Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 3870 Armstrong St, San Diego, CA compare to other homes in San Diego 92111?

Among the 11,992 homes in San Diego 92111, it is worth more than 80% of them ($1,040,957 against a typical $874,228), its price per square foot is higher than 96% of them ($845 against a typical $620), it is bigger than 37% of them (1,232 ft² against a typical 1,344 ft²), its lot is bigger than 12% of them (0.13 ac against a typical 0.19 ac) and it is newer than 23% of them (1959 against a typical 1967). Measured against all of San Diego County, it is worth more than 62% 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 3870 Armstrong St, San Diego, CA?

The 2025 property tax bill for 3870 Armstrong St, San Diego, CA was $9,272. The county assessed it at $710,270.

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