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Single Family ResidenceResidential
$943,346$907 / 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 51How 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
Last sold for $1,450,000 on May 5, 2023

640 BUTTE ST

SAUSALITO, CA 94965
3
Beds
1
Baths
1,040 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.
0.14 ac
Lot SizeThe size of the land the home sits on, from county records.
1950
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

$943K
$478K low$1.4M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,450,000 · May 5, 2023

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$20,193 (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.$1,538,740 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$923,244
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$615,496
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,508,580

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.4 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
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.minimal

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.Contemporary
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)
HeatingThe type of heating system in the home.Floor/Wall Furnace
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 · 108 ft²Patio · 108 ft²

Transaction History(4)

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(4)

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Dr. Martin Luther King Jr. AcademyB
Elementary · Grades KG–8 · 0.3 mi
H
Tamalpais High SchoolA
High · Grades 9–12 · 2.2 mi

District: Sausalito Elementary School District

Neighborhood · ZIP 94965These 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.149
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.85
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.458

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.91%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.32%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.11,048
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.525 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$138,294
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$185,477
Average tempThe average temperature here across a full year.57°F
Annual precipHow much rain and melted snow falls here in a typical year.47 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

640 Butte 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 77% of homes in Marin County
  • Costs more per square foot than 91% of homes in Nevada Street Valley
  • Smaller than 91% of homes in Marin County
  • Has a bigger lot than 73% of homes in Nevada Street Valley
  • Older than 96% of homes in Nevada Street Valley

What homes are worth in Sausalito 94965

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

This home
$513K$5.6M

This home is worth more than 26% of homes in Sausalito 94965.

How it measures up in Sausalito 94965

The dot is this home. The mark in the middle is the typical home in Sausalito 94965.

Estimated value$943,346
CheaperTypical $1,441,740Pricier

Pricier than 26% of homes nearby

Price per ft²$907
CheaperTypical $955Pricier

Pricier than 45% of homes nearby

Living area1,040 ft²
SmallerTypical 1,651 ft²Bigger

Bigger than 16% of homes nearby

Lot size0.14 ac
SmallerTypical 4,182 ft²Bigger

Bigger than 63% of homes nearby

Year built1950
OlderTypical 1966Newer

Newer than 26% of homes nearby

How 640 Butte St ranks against every home in each area.
MeasureThis homeNevada Street ValleySausalito 94965Marin County
Estimated valuepricier than$943,34651% of homes26% of homes23% of homes
Price per ft²pricier than$90791% of homes45% of homes64% of homes
Living areabigger than1,040 ft²30% of homes16% of homes9% of homes
Lot sizebigger than0.14 ac73% of homes63% of homes28% of homes
Year builtnewer than19504% of homes26% of homes23% of homes

About 640 Butte St

How much is 640 Butte St, Sausalito, CA worth?

The TopHap Estimate for 640 Butte St, Sausalito, CA is $943,346 as of Sep 24, 2026. The likely range is $478,394 to $1,408,298. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 640 Butte St, Sausalito, CA last sell?

640 Butte St, Sausalito, CA last sold on May 5, 2023 for $1,450,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 640 Butte St, Sausalito, CA?

640 Butte St, Sausalito, CA has 3 bedrooms, 1 bathrooms, 1,040 square feet of living space and a 0.14-acre lot.

When was 640 Butte St, Sausalito, CA built?

640 Butte St, Sausalito, CA was built in 1950, making it 76 years old. It is a contemporary home. The building has 1 story.

What schools serve 640 Butte St, Sausalito, CA?

640 Butte St, Sausalito, CA is assigned to Dr. Martin Luther King Jr. Academy (elementary), rated B; Tamalpais High School (high), rated A. All sit in Sausalito Elementary School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 640 Butte St, Sausalito, CA compare to other homes in Sausalito 94965?

Among the 3,820 homes in Sausalito 94965, it is worth more than 26% of them ($943,346 against a typical $1,441,740), its price per square foot is higher than 45% of them ($907 against a typical $955), it is bigger than 16% of them (1,040 ft² against a typical 1,651 ft²), its lot is bigger than 63% of them (0.14 ac against a typical 4,182 ft²) and it is newer than 26% of them (1950 against a typical 1966). Measured against all of Marin County, it is worth more than 23% 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 640 Butte St, Sausalito, CA?

The 2025 property tax bill for 640 Butte St, Sausalito, CA was $20,193. The county assessed it at $1,538,740.

More homes on Butte St

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