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Single Family ResidenceResidential
$949,449$511 / 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 90How 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 $950,000 on Nov 27, 2024

509 SAPPHIRE ST

PETALUMA, CA 94952
3
Beds
2.5
Baths
1,857 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.
2,998 ft²
Lot SizeThe size of the land the home sits on, from county records.
2024
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
6
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

$949K
$852K low$1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$950,000 · Nov 27, 2024

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$12,545 (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.$968,989 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$387,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$581,389
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$949,990

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.22
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
76
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
36
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.0.07
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
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(1)

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
Grant Elementary SchoolA
Elementary · Grades KG–6 · 0.8 mi
H
Petaluma High SchoolB
High · Grades 9–12 · 1.6 mi
M
Petaluma Junior High SchoolB-
Middle · Grades 7–8 · 2.3 mi

District: Petaluma City Elementary School District

Neighborhood · ZIP 94952These 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.92
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 100.359

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.30%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.35,634
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.160 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$113,828
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$154,802
Average tempThe average temperature here across a full year.57°F
Annual precipHow much rain and melted snow falls here in a typical year.39 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

509 Sapphire 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 more than 71% of homes in Sonoma County
  • Costs less per square foot than 79% of homes in Petaluma 94952
  • Bigger than 66% of homes in Sonoma County
  • Has a smaller lot than 91% of homes in Western
  • Among the newest homes in Western

What homes are worth in Petaluma 94952

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

This home
$523K$2.3M

This home is worth more than 42% of homes in Petaluma 94952.

How it measures up in Petaluma 94952

The dot is this home. The mark in the middle is the typical home in Petaluma 94952.

Estimated value$949,449
CheaperTypical $1,016,002Pricier

Pricier than 42% of homes nearby

Price per ft²$511
CheaperTypical $597Pricier

Pricier than 21% of homes nearby

Living area1,857 ft²
SmallerTypical 1,694 ft²Bigger

Bigger than 58% of homes nearby

Lot size2,998 ft²
SmallerTypical 0.18 acBigger

Bigger than 9% of homes nearby

Year built2024
OlderTypical 1964Newer

Newer than almost all homes nearby

How 509 Sapphire St ranks against every home in each area.
MeasureThis homeWesternPetaluma 94952Sonoma County
Estimated valuepricier than$949,44934% of homes42% of homes71% of homes
Price per ft²pricier than$51123% of homes21% of homes58% of homes
Living areabigger than1,857 ft²50% of homes58% of homes66% of homes
Lot sizebigger than2,998 ft²9% of homes9% of homes11% of homes
Year builtnewer than2024almost all homesalmost all homesalmost all homes

About 509 Sapphire St

How much is 509 Sapphire St, Petaluma, CA worth?

The TopHap Estimate for 509 Sapphire St, Petaluma, CA is $949,449 as of Sep 24, 2026. The likely range is $851,864 to $1,047,034. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 509 Sapphire St, Petaluma, CA last sell?

509 Sapphire St, Petaluma, CA last sold on Nov 27, 2024 for $950,000, according to the county's recorded deed.

How big is 509 Sapphire St, Petaluma, CA?

509 Sapphire St, Petaluma, CA has 3 bedrooms, 2.5 bathrooms, 1,857 square feet of living space and a 0.07-acre lot.

When was 509 Sapphire St, Petaluma, CA built?

509 Sapphire St, Petaluma, CA was built in 2024, making it 2 years old. The building has 2 stories.

What schools serve 509 Sapphire St, Petaluma, CA?

509 Sapphire St, Petaluma, CA is assigned to Grant Elementary School (elementary), rated A; Petaluma High School (high), rated B; Petaluma Junior High School (middle), rated B-. All sit in Petaluma City Elementary School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 509 Sapphire St, Petaluma, CA compare to other homes in Petaluma 94952?

Among the 10,074 homes in Petaluma 94952, it is worth more than 42% of them ($949,449 against a typical $1,016,002), its price per square foot is higher than 21% of them ($511 against a typical $597), it is bigger than 58% of them (1,857 ft² against a typical 1,694 ft²), its lot is bigger than 9% of them (2,998 ft² against a typical 0.18 ac) and it is newer than almost all of them (2024 against a typical 1964). Measured against all of Sonoma County, it is worth more than 71% 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 509 Sapphire St, Petaluma, CA?

The 2025 property tax bill for 509 Sapphire St, Petaluma, CA was $12,545. The county assessed it at $968,989.

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