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Duplex (2 Units, Any Combination)Residential
Last sold for $1,250,000 on Jun 21, 2023

775 SHELL AVE

MARTINEZ, CA 94553
4
Beds
3.5
Baths
5,290 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.
2.07 ac
Lot SizeThe size of the land the home sits on, from county records.
1956
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
12
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
3
ParkingThe number of parking spaces on the property, including the garage.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,250,000 · Jun 21, 2023

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$16,827 (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.$1,326,510 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$530,604
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$795,906
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,300,500

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.44
48
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
78
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
38
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
43
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.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.13 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Duplex (2 Units, Any Combination)
StyleThe architectural style of the home, such as ranch or colonial.Duplex Single
CountyCONTRA COSTA
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(5)

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.

H
Alhambra High SchoolB
High · Grades 9–12 · 0.4 mi
M
Martinez Junior High SchoolB+
Middle · Grades 6–8 · 0.6 mi
E
John Muir Elementary SchoolB
Elementary · Grades KG–5 · 0.6 mi

District: Martinez Unified School District

Neighborhood · ZIP 94553These 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.97
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.84
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.490

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.29%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.4%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.5%
PopulationHow many people live in this area.49,416
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.869 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$125,557
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$148,117
Average tempThe average temperature here across a full year.58°F
Annual precipHow much rain and melted snow falls here in a typical year.23 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

775 Shell 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.

  • Among the largest homes in Martinez 94553
  • Has a bigger lot than 98% of homes in Contra Costa County
  • Older than 78% of homes in Contra Costa County

How it measures up in Martinez 94553

The dot is this home. The mark in the middle is the typical home in Martinez 94553.

Living area5,290 ft²
SmallerTypical 1,547 ft²Bigger

Bigger than almost all homes nearby

Lot size2.07 ac
SmallerTypical 0.15 acBigger

Bigger than 97% of homes nearby

Year built1956
OlderTypical 1973Newer

Newer than 28% of homes nearby

How 775 Shell Ave ranks against every home in each area.
MeasureThis homeMartinez 94553Contra Costa County
Living areabigger than5,290 ft²almost all homesalmost all homes
Lot sizebigger than2.07 ac97% of homes98% of homes
Year builtnewer than195628% of homes22% of homes

About 775 Shell Ave

When did 775 Shell Ave, Martinez, CA last sell?

775 Shell Ave, Martinez, CA last sold on Jun 21, 2023 for $1,250,000, according to the county's recorded deed.

How big is 775 Shell Ave, Martinez, CA?

775 Shell Ave, Martinez, CA has 4 bedrooms, 3.5 bathrooms and 5,290 square feet of living space.

When was 775 Shell Ave, Martinez, CA built?

775 Shell Ave, Martinez, CA was built in 1956, making it 70 years old. It is a duplex single home. The building has 1 story.

What schools serve 775 Shell Ave, Martinez, CA?

775 Shell Ave, Martinez, CA is assigned to Alhambra High School (high), rated B; Martinez Junior High School (middle), rated B+; John Muir Elementary School (elementary), rated B. All sit in Martinez Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 775 Shell Ave, Martinez, CA compare to other homes in Martinez 94553?

Among the 16,278 homes in Martinez 94553, it is bigger than almost all of them (5,290 ft² against a typical 1,547 ft²), its lot is bigger than 97% of them (2.07 ac against a typical 0.15 ac) and it is newer than 28% of them (1956 against a typical 1973). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 775 Shell Ave, Martinez, CA?

The 2025 property tax bill for 775 Shell Ave, Martinez, CA was $16,827. The county assessed it at $1,326,510.

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