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Single Family ResidenceResidential
$1,539,683$695 / 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 87How 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
Last sold for $1,500,000 on Oct 9, 2024

309 TOP MAST CLOSE

THE SEA RANCH, CA 95497
3
Beds
2
Baths
2,215 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.
0.49 ac
Lot SizeThe size of the land the home sits on, from county records.
1991
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
3
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.5M
$1.3M low$1.7M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,500,000 · Oct 9, 2024

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$16,519 (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.$1,530,000 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$612,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$918,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,500,000

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.20
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
71
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
30
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
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
CountySONOMA
Lot (acres)The size of the land the home sits on, from county records.0.49
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
HeatingThe type of heating system in the home.None
CoolingThe type of cooling or air conditioning in the home.None
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(5)

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
Horicon Elementary SchoolD+
Elementary · Grades KG–8 · 3.7 mi
H
Point Arena High SchoolD+
High · Grades 9–12 · 20.9 mi

District: Point Arena Joint Union High School District

Neighborhood · ZIP 95497These 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.196
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 100.454

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.45%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.15%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.7%
PopulationHow many people live in this area.38
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.17 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$90,867
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$122,988
Average tempThe average temperature here across a full year.54°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

309 Top Mast Close 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 91% of homes in Sonoma County
  • Costs more per square foot than 85% of homes in Sonoma County
  • Bigger than 81% of homes in Sonoma County
  • Has a bigger lot than 77% of homes in Sonoma County
  • Newer than 75% of homes in Sonoma County

What homes are worth in The Sea Ranch 95497

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

This home
$715K$2.9M

This home is worth more than 62% of homes in The Sea Ranch 95497.

How it measures up in The Sea Ranch 95497

The dot is this home. The mark in the middle is the typical home in The Sea Ranch 95497.

Estimated value$1,539,683
CheaperTypical $1,398,287Pricier

Pricier than 62% of homes nearby

Price per ft²$695
CheaperTypical $787Pricier

Pricier than 21% of homes nearby

Living area2,215 ft²
SmallerTypical 1,780 ft²Bigger

Bigger than 78% of homes nearby

Lot size0.49 ac
SmallerTypical 0.44 acBigger

Bigger than 62% of homes nearby

Year built1991
OlderTypical 1989Newer

Newer than 59% of homes nearby

How 309 Top Mast Close ranks against every home in each area.
MeasureThis homeThe Sea Ranch 95497Sonoma County
Estimated valuepricier than$1,539,68362% of homes91% of homes
Price per ft²pricier than$69521% of homes85% of homes
Living areabigger than2,215 ft²78% of homes81% of homes
Lot sizebigger than0.49 ac62% of homes77% of homes
Year builtnewer than199159% of homes75% of homes

About 309 Top Mast Close

How much is 309 Top Mast Close, The Sea Ranch, CA worth?

The TopHap Estimate for 309 Top Mast Close, The Sea Ranch, CA is $1,539,683 as of Aug 30, 2026. The likely range is $1,342,050 to $1,737,316. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 309 Top Mast Close, The Sea Ranch, CA last sell?

309 Top Mast Close, The Sea Ranch, CA last sold on Oct 9, 2024 for $1,500,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 309 Top Mast Close, The Sea Ranch, CA?

309 Top Mast Close, The Sea Ranch, CA has 3 bedrooms, 2 bathrooms, 2,215 square feet of living space and a 0.49-acre lot.

When was 309 Top Mast Close, The Sea Ranch, CA built?

309 Top Mast Close, The Sea Ranch, CA was built in 1991, making it 35 years old. The building has 2 stories.

What schools serve 309 Top Mast Close, The Sea Ranch, CA?

309 Top Mast Close, The Sea Ranch, CA is assigned to Horicon Elementary School (elementary), rated D+; Point Arena High School (high), rated D+. All sit in Point Arena Joint Union High School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 309 Top Mast Close, The Sea Ranch, CA compare to other homes in The Sea Ranch 95497?

Among the 1,702 homes in The Sea Ranch 95497, it is worth more than 62% of them ($1,539,683 against a typical $1,398,287), its price per square foot is higher than 21% of them ($695 against a typical $787), it is bigger than 78% of them (2,215 ft² against a typical 1,780 ft²), its lot is bigger than 62% of them (0.49 ac against a typical 0.44 ac) and it is newer than 59% of them (1991 against a typical 1989). Measured against all of Sonoma County, it is worth more than 91% 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 Top Mast Close, The Sea Ranch, CA?

The 2025 property tax bill for 309 Top Mast Close, The Sea Ranch, CA was $16,519. The county assessed it at $1,530,000.

More homes on Top Mast Close

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Assigned schools

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