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Duplex (2 Units, Any Combination)Residential

402 ASH ST

MILL VALLEY, CA 94941
4
Beds
2
Baths
0.14 ac
Lot SizeThe size of the land the home sits on, from county records.
1925
Year BuiltThe year the home was originally built, according to county records.
8
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$13,818 (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.$388,363 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$159,297
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$229,066
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$380,749

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.10 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.0.2 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.Duplex (2 Units, Any Combination)
StyleThe architectural style of the home, such as ranch or colonial.Duplex Single
CountyMARIN
Lot (acres)The size of the land the home sits on, from county records.0.14
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Roll Tar & Gravel
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(2)

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
Tamalpais Valley Elementary SchoolA+
Elementary · Grades KG–5 · 0.6 mi
H
Tamalpais High SchoolA
High · Grades 9–12 · 0.9 mi
M
Mill Valley Middle SchoolA+
Middle · Grades 6–8 · 1.3 mi

District: Mill Valley Elementary School District

Neighborhood · ZIP 94941These 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.91
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 100.439

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.93%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.37%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.3%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.30,767
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,462 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$194,124
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$248,795
Average tempThe average temperature here across a full year.57°F
Annual precipHow much rain and melted snow falls here in a typical year.42 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

402 Ash 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.

  • Has a smaller lot than 75% of homes in Mill Valley 94941
  • Older than 91% of homes in Marin County

How it measures up in Mill Valley 94941

The dot is this home. The mark in the middle is the typical home in Mill Valley 94941.

Lot size0.14 ac
SmallerTypical 0.19 acBigger

Bigger than 25% of homes nearby

Year built1925
OlderTypical 1959Newer

Newer than 12% of homes nearby

How 402 Ash St ranks against every home in each area.
MeasureThis homeMill Valley 94941Marin County
Lot sizebigger than0.14 ac25% of homes28% of homes
Year builtnewer than192512% of homes9% of homes

About 402 Ash St

When did 402 Ash St, Mill Valley, CA last sell?

402 Ash St, Mill Valley, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 402 Ash St, Mill Valley, CA?

402 Ash St, Mill Valley, CA has 4 bedrooms, 2 bathrooms and a 0.14-acre lot.

When was 402 Ash St, Mill Valley, CA built?

402 Ash St, Mill Valley, CA was built in 1925, making it 101 years old. It is a duplex single home.

What schools serve 402 Ash St, Mill Valley, CA?

402 Ash St, Mill Valley, CA is assigned to Tamalpais Valley Elementary School (elementary), rated A+; Tamalpais High School (high), rated A; Mill Valley Middle School (middle), rated A+. All sit in Mill Valley Elementary School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 402 Ash St, Mill Valley, CA compare to other homes in Mill Valley 94941?

Among the 10,555 homes in Mill Valley 94941, its lot is bigger than 25% of them (0.14 ac against a typical 0.19 ac) and it is newer than 12% of them (1925 against a typical 1959). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 402 Ash St, Mill Valley, CA?

The 2025 property tax bill for 402 Ash St, Mill Valley, CA was $13,818. The county assessed it at $388,363.

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