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Duplex (2 Units, Any Combination)Residential
Last sold for $400,000 on Nov 19, 2009

109 MAIN ST

MARTINEZ, CA 94553
3
Beds
2
Baths
2,502 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.
1935
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
10
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

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$400,000 · Nov 19, 2009

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,133 (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.$526,636 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$263,318
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$263,318
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$516,310

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.34
1
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.

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
Lot (acres)The size of the land the home sits on, from county records.0.13
HeatingThe type of heating system in the home.Central
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(7)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Foreclosure Filings(1)

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

M
Martinez Junior High SchoolB+
Middle · Grades 6–8 · 0.6 mi
H
Alhambra High SchoolB
High · Grades 9–12 · 1.0 mi
E
John Muir Elementary SchoolB
Elementary · Grades KG–5 · 1.5 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

109 Main 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.

  • Bigger than 91% of homes in Martinez 94553
  • Older than 97% 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 area2,502 ft²
SmallerTypical 1,542 ft²Bigger

Bigger than 91% of homes nearby

Lot size0.13 ac
SmallerTypical 0.15 acBigger

Bigger than 42% of homes nearby

Year built1935
OlderTypical 1973Newer

Newer than 9% of homes nearby

How 109 Main St ranks against every home in each area.
MeasureThis homeMartinez 94553Contra Costa County
Living areabigger than2,502 ft²91% of homes78% of homes
Lot sizebigger than0.13 ac42% of homes38% of homes
Year builtnewer than19359% of homes3% of homes

About 109 Main St

When did 109 Main St, Martinez, CA last sell?

109 Main St, Martinez, CA last sold on Nov 19, 2009 for $400,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 109 Main St, Martinez, CA?

109 Main St, Martinez, CA has 3 bedrooms, 2 bathrooms, 2,502 square feet of living space and a 0.13-acre lot.

When was 109 Main St, Martinez, CA built?

109 Main St, Martinez, CA was built in 1935, making it 91 years old. It is a duplex single home. The building has 1 story.

What schools serve 109 Main St, Martinez, CA?

109 Main St, Martinez, CA is assigned to Martinez Junior High School (middle), rated B+; Alhambra High School (high), 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 109 Main St, Martinez, CA compare to other homes in Martinez 94553?

Among the 16,278 homes in Martinez 94553, it is bigger than 91% of them (2,502 ft² against a typical 1,542 ft²), its lot is bigger than 42% of them (0.13 ac against a typical 0.15 ac) and it is newer than 9% of them (1935 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 109 Main St, Martinez, CA?

The 2025 property tax bill for 109 Main St, Martinez, CA was $7,133. The county assessed it at $526,636.

More homes on Main St

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Assigned schools

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