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Common Area (Residential)Other / Unknown
$1,665,702
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 84How 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

NO ADDRESS

DIABLO, CA 94528
0
Baths
1.13 ac
Lot SizeThe size of the land the home sits on, from county records.

Valuation

$1.7M
$1.4M low$1.9M high

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.45
35
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
84
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
47
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
46
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
14
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
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.1 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.Common Area (Residential)
CountyCONTRA COSTA
PoolWhether the property has a pool, and what kind, such as in-ground.No

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
Green Valley Elementary SchoolA+
Elementary · Grades KG–5 · 1.2 mi
M
Los Cerros Middle SchoolA+
Middle · Grades 6–8 · 1.3 mi
H
Monte Vista High SchoolA+
High · Grades 9–12 · 1.4 mi

District: San Ramon Valley Unified School District

Neighborhood · ZIP 94528These 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.71
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.85
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.593

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.0%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.1,042
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,912 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$230,686
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$330,622
Average tempThe average temperature here across a full year.59°F
Annual precipHow much rain and melted snow falls here in a typical year.20 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.78%

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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

No Address 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 97% of homes in Diablo 94528
  • Has a bigger lot than 97% of homes in Contra Costa County

What homes are worth in Diablo 94528

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

This home
$1.5M$7.8M

This home is worth more than 3% of homes in Diablo 94528.

How it measures up in Diablo 94528

The dot is this home. The mark in the middle is the typical home in Diablo 94528.

Estimated value$1,665,702
CheaperTypical $3,137,338Pricier

Pricier than 3% of homes nearby

Lot size1.13 ac
SmallerTypical 0.74 acBigger

Bigger than 78% of homes nearby

How No Address ranks against every home in each area.
MeasureThis homeDiablo 94528Contra Costa County
Estimated valuepricier than$1,665,7023% of homes85% of homes
Lot sizebigger than1.13 ac78% of homes97% of homes

About No Address

How much is No Address, Diablo, CA worth?

The TopHap Estimate for No Address, Diablo, CA is $1,665,702 as of Jul 14, 2026. The likely range is $1,395,231 to $1,936,173. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did No Address, Diablo, CA last sell?

No Address, Diablo, CA last sold on Jan 1, 1900, according to the county's recorded deed.

What schools serve No Address, Diablo, CA?

No Address, Diablo, CA is assigned to Green Valley Elementary School (elementary), rated A+; Los Cerros Middle School (middle), rated A+; Monte Vista High School (high), rated A+. All sit in San Ramon Valley Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does No Address, Diablo, CA compare to other homes in Diablo 94528?

Among the 393 homes in Diablo 94528, it is worth more than 3% of them ($1,665,702 against a typical $3,137,338) and its lot is bigger than 78% of them (1.13 ac against a typical 0.74 ac). Measured against all of Contra Costa County, it is worth more than 85% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

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Assigned schools

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See this home in context

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