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Single Family ResidenceResidential
$496,600$776 / 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 Aug 30, 2026
Last sold for $542,000 on Nov 18, 2020

405 MELLUS ST

MARTINEZ, CA 94553
2
Beds
1
Baths
640 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.
2,100 ft²
Lot SizeThe size of the land the home sits on, from county records.
1930
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.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$497K
$468K low$525K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$542,000 · Nov 18, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,733 (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.$602,122 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$441,631
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$160,491
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$590,317

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.47
67
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
77
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.35 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Bungalow
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.1950
Lot (acres)The size of the land the home sits on, from county records.0.05
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Floor/Wall Furnace
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck

Transaction History(9)

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(2)

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 · 0.3 mi
H
Alhambra High SchoolA-
High · Grades 9–12 · 0.8 mi
E
John Muir Elementary SchoolB
Elementary · Grades KG–5 · 1.3 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

405 Mellus 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 less than 87% of homes in Martinez 94553
  • Among the highest price per square foot in Martinez 94553
  • Among the smallest homes in Martinez 94553
  • Has a smaller lot than 89% of homes in Contra Costa County
  • Older than 97% 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
$359K$1.6M

This home is worth more than 13% 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$496,600
CheaperTypical $717,547Pricier

Pricier than 13% of homes nearby

Price per ft²$776
CheaperTypical $462Pricier

Pricier than almost all homes nearby

Living area640 ft²
SmallerTypical 1,544 ft²Bigger

Smaller than almost all homes nearby

Lot size2,100 ft²
SmallerTypical 0.14 acBigger

Bigger than 13% of homes nearby

Year built1930
OlderTypical 1973Newer

Newer than 8% of homes nearby

How 405 Mellus St ranks against every home in each area.
MeasureThis homeMartinez 94553Contra Costa County
Estimated valuepricier than$496,60013% of homes17% of homes
Price per ft²pricier than$776almost all homes90% of homes
Living areabigger than640 ft²almost no homesalmost no homes
Lot sizebigger than2,100 ft²13% of homes11% of homes
Year builtnewer than19308% of homes3% of homes

About 405 Mellus St

How much is 405 Mellus St, Martinez, CA worth?

The TopHap Estimate for 405 Mellus St, Martinez, CA is $496,600 as of Aug 30, 2026. The likely range is $467,762 to $525,438. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 405 Mellus St, Martinez, CA last sell?

405 Mellus St, Martinez, CA last sold on Nov 18, 2020 for $542,000, according to the county's recorded deed. TopHap holds 6 recorded sales for this parcel.

How big is 405 Mellus St, Martinez, CA?

405 Mellus St, Martinez, CA has 2 bedrooms, 1 bathrooms, 640 square feet of living space and a 0.05-acre lot.

When was 405 Mellus St, Martinez, CA built?

405 Mellus St, Martinez, CA was built in 1930, making it 96 years old. It is a bungalow home. The building has 1 story.

What schools serve 405 Mellus St, Martinez, CA?

405 Mellus St, Martinez, CA is assigned to Martinez Junior High School (middle), rated B; Alhambra High School (high), rated A-; 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 405 Mellus St, Martinez, CA compare to other homes in Martinez 94553?

Among the 16,279 homes in Martinez 94553, it is worth more than 13% of them ($496,600 against a typical $717,547), its price per square foot is higher than almost all of them ($776 against a typical $462), it is bigger than almost none of them (640 ft² against a typical 1,544 ft²), its lot is bigger than 13% of them (2,100 ft² against a typical 0.14 ac) and it is newer than 8% of them (1930 against a typical 1973). Measured against all of Contra Costa County, it is worth more than 17% 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 405 Mellus St, Martinez, CA?

The 2025 property tax bill for 405 Mellus St, Martinez, CA was $7,733. The county assessed it at $602,122.

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