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Single Family ResidenceResidential
$410,283$459 / 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 93How 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

4255 VALLEY AVE

MARTINEZ, CA 94553
2
Beds
1
Baths
894 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.
0.11 ac
Lot SizeThe size of the land the home sits on, from county records.
1942
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$410K
$381K low$440K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,982 (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.$162,287 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$57,684
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$104,603
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$159,105

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.18
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.
40
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
36
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.Single Family Residence
CountyCONTRA COSTA
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1945
Lot (acres)The size of the land the home sits on, from county records.0.12
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
Las Juntas Elementary SchoolC+
Elementary · Grades KG–5 · 0.6 mi
M
Martinez Junior High SchoolB
Middle · Grades 6–8 · 2.4 mi
H
Alhambra High SchoolA-
High · Grades 9–12 · 2.7 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

4255 Valley 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 less than 95% of homes in Martinez 94553
  • Smaller than 95% of homes in Martinez 94553
  • Has a smaller lot than 73% of homes in Contra Costa County
  • Older than 93% of homes in Contra Costa County

What homes are worth in Martinez 94553

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

This home
$356K$1.5M

This home is worth more than 5% of homes in Martinez 94553.

How it measures up in Martinez 94553

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

Estimated value$410,283
CheaperTypical $712,029Pricier

Pricier than 5% of homes nearby

Price per ft²$459
CheaperTypical $459Pricier

Pricier than 50% of homes nearby

Living area894 ft²
SmallerTypical 1,545 ft²Bigger

Bigger than 5% of homes nearby

Lot size0.11 ac
SmallerTypical 0.15 acBigger

Bigger than 32% of homes nearby

Year built1942
OlderTypical 1973Newer

Newer than 14% of homes nearby

How 4255 Valley Ave ranks against every home in each area.
MeasureThis homeMartinez 94553Contra Costa County
Estimated valuepricier than$410,2835% of homes8% of homes
Price per ft²pricier than$45950% of homes51% of homes
Living areabigger than894 ft²5% of homes5% of homes
Lot sizebigger than0.11 ac32% of homes27% of homes
Year builtnewer than194214% of homes7% of homes

About 4255 Valley Ave

How much is 4255 Valley Ave, Martinez, CA worth?

The TopHap Estimate for 4255 Valley Ave, Martinez, CA is $410,283 as of Sep 24, 2026. The likely range is $380,601 to $439,965. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4255 Valley Ave, Martinez, CA last sell?

4255 Valley Ave, Martinez, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 4255 Valley Ave, Martinez, CA?

4255 Valley Ave, Martinez, CA has 2 bedrooms, 1 bathrooms, 894 square feet of living space and a 0.12-acre lot.

When was 4255 Valley Ave, Martinez, CA built?

4255 Valley Ave, Martinez, CA was built in 1942, making it 84 years old. The building has 1 story.

What schools serve 4255 Valley Ave, Martinez, CA?

4255 Valley Ave, Martinez, CA is assigned to Las Juntas Elementary School (elementary), rated C+; Martinez Junior High School (middle), rated B; Alhambra High School (high), rated A-. All sit in Martinez Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4255 Valley Ave, Martinez, CA compare to other homes in Martinez 94553?

Among the 16,279 homes in Martinez 94553, it is worth more than 5% of them ($410,283 against a typical $712,029), its price per square foot is higher than 50% of them ($459 against a typical $459), it is bigger than 5% of them (894 ft² against a typical 1,545 ft²), its lot is bigger than 32% of them (0.11 ac against a typical 0.15 ac) and it is newer than 14% of them (1942 against a typical 1973). Measured against all of Contra Costa County, it is worth more than 8% 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 4255 Valley Ave, Martinez, CA?

The 2025 property tax bill for 4255 Valley Ave, Martinez, CA was $2,982. The county assessed it at $162,287.

More homes on Valley Ave

Closest homes

More homes in Martinez 94553

Assigned schools

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