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Single Family ResidenceResidential
$8,302,840$2,575 / 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 Oct 21, 2026
Last sold for $6,000,000 on Jun 19, 2018

51 CORNELIA AVE

MILL VALLEY, CA 94941
4
Beds
4
Baths
3,225 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.
0.37 ac
Lot SizeThe size of the land the home sits on, from county records.
2018
Year BuiltThe year the home was originally built, according to county records.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$8.3M
$7.7M low$8.9M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$6,000,000 · Jun 19, 2018

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$84,617 (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.$7,275,480 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$2,611,260
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$4,664,220
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$7,132,859

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyMARIN
Lot (acres)The size of the land the home sits on, from county records.0.37
HeatingThe type of heating system in the home.Central
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 · 849 ft²Patio · 849 ft²

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.

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 · 0.2 mi
M
Mill Valley Middle SchoolA+
Middle · Grades 6–8 · 1.6 mi
H
Tamalpais High SchoolA
High · Grades 9–12 · 1.8 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

51 Cornelia 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.

  • Among the most valuable homes in Mill Valley 94941
  • Among the highest price per square foot in Mill Valley 94941
  • Bigger than 90% of homes in Marin County
  • Has a bigger lot than 82% of homes in Mill Valley 94941
  • Among the newest 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
$788K$6M

This home is worth more than almost all 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$8,302,840
CheaperTypical $2,128,689Pricier

Pricier than almost all homes nearby

Price per ft²$2575
CheaperTypical $1082Pricier

Pricier than almost all homes nearby

Living area3,225 ft²
SmallerTypical 1,968 ft²Bigger

Bigger than 88% of homes nearby

Lot size0.37 ac
SmallerTypical 0.19 acBigger

Bigger than 82% of homes nearby

Year built2018
OlderTypical 1959Newer

Newer than almost all homes nearby

How 51 Cornelia Ave ranks against every home in each area.
MeasureThis homeCascade CanyonMill Valley 94941Marin County
Estimated valuepricier than$8,302,84097% of homesalmost all homesalmost all homes
Price per ft²pricier than$2575almost all homesalmost all homesalmost all homes
Living areabigger than3,225 ft²72% of homes88% of homes90% of homes
Lot sizebigger than0.37 ac46% of homes82% of homes81% of homes
Year builtnewer than2018almost all homesalmost all homesalmost all homes

About 51 Cornelia Ave

How much is 51 Cornelia Ave, Mill Valley, CA worth?

The TopHap Estimate for 51 Cornelia Ave, Mill Valley, CA is $8,302,840 as of Oct 21, 2026. The likely range is $7,741,864 to $8,863,816. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 51 Cornelia Ave, Mill Valley, CA last sell?

51 Cornelia Ave, Mill Valley, CA last sold on Jun 19, 2018 for $6,000,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 51 Cornelia Ave, Mill Valley, CA?

51 Cornelia Ave, Mill Valley, CA has 4 bedrooms, 4 bathrooms, 3,225 square feet of living space and a 0.37-acre lot.

When was 51 Cornelia Ave, Mill Valley, CA built?

51 Cornelia Ave, Mill Valley, CA was built in 2018, making it 8 years old.

What schools serve 51 Cornelia Ave, Mill Valley, CA?

51 Cornelia Ave, 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 51 Cornelia Ave, 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 almost all of them ($8,302,840 against a typical $2,128,689), its price per square foot is higher than almost all of them ($2575 against a typical $1082), it is bigger than 88% of them (3,225 ft² against a typical 1,968 ft²), its lot is bigger than 82% of them (0.37 ac against a typical 0.19 ac) and it is newer than almost all of them (2018 against a typical 1959). Measured against all of Marin County, it is worth more than almost all 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 51 Cornelia Ave, Mill Valley, CA?

The 2025 property tax bill for 51 Cornelia Ave, Mill Valley, CA was $84,617. The county assessed it at $7,275,480.

More homes on Cornelia Ave

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