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Single Family ResidenceResidential
$1,953,364$1,109 / 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 Oct 21, 2026

6 LOWER ALCATRAZ PL

MILL VALLEY, CA 94941
2
Beds
1
Baths
1,762 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.
1915
Year BuiltThe year the home was originally built, according to county records.

Valuation

$2M
$1.8M low$2.1M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,239 (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.$583,444 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$291,250
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$292,194
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$572,006

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.Contemporary
CountyMARIN
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
FireplaceWhether the home has a fireplace, and what kind.Yes
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 · 160 ft²Patio · 160 ft²

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
Old Mill Elementary SchoolA+
Elementary · Grades KG–5 · 0.3 mi
M
Mill Valley Middle SchoolA+
Middle · Grades 6–8 · 1.4 mi
H
Tamalpais High SchoolA
High · Grades 9–12 · 1.6 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

6 Lower Alcatraz Pl 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 81% of homes in Blithedale Canyon
  • Costs more per square foot than 79% of homes in Marin County
  • Smaller than 75% of homes in Blithedale Canyon
  • Has a smaller lot than 90% of homes in Blithedale Canyon
  • Older than 95% of homes in Marin County

What homes are worth in Mill Valley 94941

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

This home
$799K$6M

This home is worth more than 43% of homes in Mill Valley 94941.

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.

Estimated value$1,953,364
CheaperTypical $2,117,648Pricier

Pricier than 43% of homes nearby

Price per ft²$1109
CheaperTypical $1081Pricier

Pricier than 54% of homes nearby

Living area1,762 ft²
SmallerTypical 1,960 ft²Bigger

Bigger than 40% of homes nearby

Lot size0.13 ac
SmallerTypical 0.19 acBigger

Bigger than 22% of homes nearby

Year built1915
OlderTypical 1959Newer

Newer than 7% of homes nearby

How 6 Lower Alcatraz Pl ranks against every home in each area.
MeasureThis homeBlithedale CanyonMill Valley 94941Marin County
Estimated valuepricier than$1,953,36419% of homes43% of homes70% of homes
Price per ft²pricier than$110934% of homes54% of homes79% of homes
Living areabigger than1,762 ft²25% of homes40% of homes47% of homes
Lot sizebigger than0.13 ac10% of homes22% of homes27% of homes
Year builtnewer than191520% of homes7% of homes5% of homes

About 6 Lower Alcatraz Pl

How much is 6 Lower Alcatraz Pl, Mill Valley, CA worth?

The TopHap Estimate for 6 Lower Alcatraz Pl, Mill Valley, CA is $1,953,364 as of Oct 21, 2026. The likely range is $1,829,170 to $2,077,558. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 6 Lower Alcatraz Pl, Mill Valley, CA last sell?

6 Lower Alcatraz Pl, Mill Valley, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 6 Lower Alcatraz Pl, Mill Valley, CA?

6 Lower Alcatraz Pl, Mill Valley, CA has 2 bedrooms, 1 bathrooms, 1,762 square feet of living space and a 0.13-acre lot.

When was 6 Lower Alcatraz Pl, Mill Valley, CA built?

6 Lower Alcatraz Pl, Mill Valley, CA was built in 1915, making it 111 years old. It is a contemporary home.

What schools serve 6 Lower Alcatraz Pl, Mill Valley, CA?

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

How does 6 Lower Alcatraz Pl, Mill Valley, CA compare to other homes in Mill Valley 94941?

Among the 10,555 homes in Mill Valley 94941, it is worth more than 43% of them ($1,953,364 against a typical $2,117,648), its price per square foot is higher than 54% of them ($1109 against a typical $1081), it is bigger than 40% of them (1,762 ft² against a typical 1,960 ft²), its lot is bigger than 22% of them (0.13 ac against a typical 0.19 ac) and it is newer than 7% of them (1915 against a typical 1959). Measured against all of Marin County, it is worth more than 70% 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 6 Lower Alcatraz Pl, Mill Valley, CA?

The 2025 property tax bill for 6 Lower Alcatraz Pl, Mill Valley, CA was $8,239. The county assessed it at $583,444.

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