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Single Family ResidenceResidential
$5,402,098$2,164 / 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 85How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $5,300,000 on Apr 15, 2025

186 PROSPECT AVE

ROSS, CA 94957
4
Beds
3.5
Baths
2,496 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.
0.33 ac
Lot SizeThe size of the land the home sits on, from county records.
1913
Year BuiltThe year the home was originally built, according to county records.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$5.4M
$4.6M low$6.2M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$5,300,000 · Apr 15, 2025
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$2,202,098
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$1,761,678
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.60%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$3,200,000
WELLS FARGO BANK NA · recorded Apr 15, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$48,393 (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.$5,400,900 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$2,040,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$3,360,900
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$3,817,035

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
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.2010
Lot (acres)The size of the land the home sits on, from county records.0.33
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 · 173 ft²Patio · 173 ft²

Transaction History(12)

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
Ross SchoolA+
Elementary · Grades KG–8 · 0.6 mi
H
Redwood High SchoolA+
High · Grades 9–12 · 2.9 mi

District: Tamalpais Union High School District

Neighborhood · ZIP 94957These 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.58
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.83
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.370

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.90%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.42%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.1%
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.2,366
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,440 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$259,576
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$395,275
Average tempThe average temperature here across a full year.58°F
Annual precipHow much rain and melted snow falls here in a typical year.44 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.78%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Absentee owner
Company ownedWhether the owner is a company or trust rather than a person.Yes

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

186 Prospect 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 San Anselmo
  • Among the highest price per square foot in San Anselmo
  • Bigger than 82% of homes in San Anselmo
  • Has a bigger lot than 86% of homes in San Anselmo
  • Older than 95% of homes in Marin County

What homes are worth in Ross 94957

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

This home
$1.5M$8.5M

This home is worth more than 77% of homes in Ross 94957.

How it measures up in Ross 94957

The dot is this home. The mark in the middle is the typical home in Ross 94957.

Estimated value$5,402,098
CheaperTypical $3,829,447Pricier

Pricier than 77% of homes nearby

Price per ft²$2164
CheaperTypical $1521Pricier

Pricier than 94% of homes nearby

Living area2,496 ft²
SmallerTypical 2,773 ft²Bigger

Bigger than 40% of homes nearby

Lot size0.33 ac
SmallerTypical 0.39 acBigger

Bigger than 43% of homes nearby

Year built1913
OlderTypical 1938Newer

Newer than 21% of homes nearby

How 186 Prospect Ave ranks against every home in each area.
MeasureThis homeSan AnselmoRoss 94957Marin County
Estimated valuepricier than$5,402,098almost all homes77% of homes98% of homes
Price per ft²pricier than$2164almost all homes94% of homesalmost all homes
Living areabigger than2,496 ft²82% of homes40% of homes76% of homes
Lot sizebigger than0.33 ac86% of homes43% of homes78% of homes
Year builtnewer than191311% of homes21% of homes5% of homes

About 186 Prospect Ave

How much is 186 Prospect Ave, Ross, CA worth?

The TopHap Estimate for 186 Prospect Ave, Ross, CA is $5,402,098 as of Jul 14, 2026. The likely range is $4,604,094 to $6,200,102. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 186 Prospect Ave, Ross, CA last sell?

186 Prospect Ave, Ross, CA last sold on Apr 15, 2025 for $5,300,000, according to the county's recorded deed. TopHap holds 6 recorded sales for this parcel.

How big is 186 Prospect Ave, Ross, CA?

186 Prospect Ave, Ross, CA has 4 bedrooms, 3.5 bathrooms, 2,496 square feet of living space and a 0.33-acre lot.

When was 186 Prospect Ave, Ross, CA built?

186 Prospect Ave, Ross, CA was built in 1913, making it 113 years old. It is a contemporary home.

What schools serve 186 Prospect Ave, Ross, CA?

186 Prospect Ave, Ross, CA is assigned to Ross School (elementary), rated A+; Redwood High School (high), rated A+. All sit in Tamalpais Union High School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 186 Prospect Ave, Ross, CA compare to other homes in Ross 94957?

Among the 817 homes in Ross 94957, it is worth more than 77% of them ($5,402,098 against a typical $3,829,447), its price per square foot is higher than 94% of them ($2164 against a typical $1521), it is bigger than 40% of them (2,496 ft² against a typical 2,773 ft²), its lot is bigger than 43% of them (0.33 ac against a typical 0.39 ac) and it is newer than 21% of them (1913 against a typical 1938). Measured against all of Marin County, it is worth more than 98% 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 186 Prospect Ave, Ross, CA?

The 2025 property tax bill for 186 Prospect Ave, Ross, CA was $48,393. The county assessed it at $5,400,900.

More homes on Prospect Ave

Closest homes

More homes in Ross 94957

Assigned schools

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