Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$2,458,436$790 / 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 91How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026

309 RICHARDSON CT

MILL VALLEY, CA 94941
4
Beds
3
Baths
3,111 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.
0.34 ac
Lot SizeThe size of the land the home sits on, from county records.
1964
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

$2.5M
$2.2M low$2.7M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$11,091 (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.$587,075 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$172,647
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$414,428
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$575,566

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.147 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.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
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.1981
Lot (acres)The size of the land the home sits on, from county records.0.34
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 · 36 ft²Patio · 36 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
Tamalpais Valley Elementary SchoolA+
Elementary · Grades KG–5 · 0.3 mi
H
Tamalpais High SchoolA+
High · Grades 9–12 · 1.0 mi
M
Mill Valley Middle SchoolA
Middle · Grades 6–8 · 1.4 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%

Owner Tools

Do you own this home?
Claim this home

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

309 Richardson Ct 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 more than 82% of homes in Marin County
  • Costs less per square foot than 93% of homes in Mill Valley 94941
  • Bigger than 88% of homes in Marin County
  • Has a bigger lot than 80% of homes in Mill Valley 94941

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
$762K$5.6M

This home is worth more than 65% 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$2,458,436
CheaperTypical $2,067,423Pricier

Pricier than 65% of homes nearby

Price per ft²$790
CheaperTypical $1049Pricier

Pricier than 7% of homes nearby

Living area3,111 ft²
SmallerTypical 1,965 ft²Bigger

Bigger than 86% of homes nearby

Lot size0.34 ac
SmallerTypical 0.19 acBigger

Bigger than 80% of homes nearby

Year built1964
OlderTypical 1959Newer

Newer than 61% of homes nearby

How 309 Richardson Ct ranks against every home in each area.
MeasureThis homeMill Valley 94941Marin County
Estimated valuepricier than$2,458,43665% of homes82% of homes
Price per ft²pricier than$7907% of homes52% of homes
Living areabigger than3,111 ft²86% of homes88% of homes
Lot sizebigger than0.34 ac80% of homes79% of homes
Year builtnewer than196461% of homes55% of homes

About 309 Richardson Ct

How much is 309 Richardson Ct, Mill Valley, CA worth?

The TopHap Estimate for 309 Richardson Ct, Mill Valley, CA is $2,458,436 as of Aug 30, 2026. The likely range is $2,239,004 to $2,677,867. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 309 Richardson Ct, Mill Valley, CA last sell?

309 Richardson Ct, Mill Valley, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 309 Richardson Ct, Mill Valley, CA?

309 Richardson Ct, Mill Valley, CA has 4 bedrooms, 3 bathrooms, 3,111 square feet of living space and a 0.34-acre lot.

When was 309 Richardson Ct, Mill Valley, CA built?

309 Richardson Ct, Mill Valley, CA was built in 1964, making it 62 years old. It is a contemporary home.

What schools serve 309 Richardson Ct, Mill Valley, CA?

309 Richardson Ct, 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 309 Richardson Ct, Mill Valley, CA compare to other homes in Mill Valley 94941?

Among the 10,554 homes in Mill Valley 94941, it is worth more than 65% of them ($2,458,436 against a typical $2,067,423), its price per square foot is higher than 7% of them ($790 against a typical $1049), it is bigger than 86% of them (3,111 ft² against a typical 1,965 ft²), its lot is bigger than 80% of them (0.34 ac against a typical 0.19 ac) and it is newer than 61% of them (1964 against a typical 1959). Measured against all of Marin County, it is worth more than 82% 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 309 Richardson Ct, Mill Valley, CA?

The 2025 property tax bill for 309 Richardson Ct, Mill Valley, CA was $11,091. The county assessed it at $587,075.

More homes on Richardson Ct

Closest homes

More homes in Mill Valley 94941

Assigned schools

Explore the area

See this home in context

Open 309 Richardson Ct on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map