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Single Family ResidenceResidential
$1,140,019$488 / 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 83How 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 $620,000 on Mar 23, 2010

1840 CASTLE DR

PETALUMA, CA 94954
4
Beds
2
Baths
2,337 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.
0.27 ac
Lot SizeThe size of the land the home sits on, from county records.
1992
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
4
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
3
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.1M
$949K low$1.3M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$620,000 · Mar 23, 2010

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,169 (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.$816,300 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$219,869
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$596,431
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$800,295

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.32
55
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
72
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.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.18 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.Custom Design
CountySONOMA
Lot (acres)The size of the land the home sits on, from county records.0.27
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
HeatingThe type of heating system 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(14)

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(2)

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

E
Sonoma Mountain Elementary Charter SchoolA
Elementary · Grades KG–6 · 0.3 mi
M
Kenilworth Junior High SchoolB
Middle · Grades 7–8 · 1.1 mi
H
Casa Grande High SchoolB+
High · Grades 9–12 · 2.1 mi

District: Old Adobe Union Elementary School District

Neighborhood · ZIP 94954These 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.61
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 100.420

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.24%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.4%
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.38,369
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.556 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$117,220
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$141,939
Average tempThe average temperature here across a full year.58°F
Annual precipHow much rain and melted snow falls here in a typical year.30 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

1840 Castle Dr 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 92% of homes in Petaluma 94954
  • Bigger than 87% of homes in Petaluma 94954
  • Has a bigger lot than 94% of homes in College
  • Newer than 76% of homes in Sonoma County

What homes are worth in Petaluma 94954

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

This home
$539K$1.5M

This home is worth more than 92% of homes in Petaluma 94954.

How it measures up in Petaluma 94954

The dot is this home. The mark in the middle is the typical home in Petaluma 94954.

Estimated value$1,140,019
CheaperTypical $799,872Pricier

Pricier than 92% of homes nearby

Price per ft²$488
CheaperTypical $477Pricier

Pricier than 56% of homes nearby

Living area2,337 ft²
SmallerTypical 1,669 ft²Bigger

Bigger than 87% of homes nearby

Lot size0.27 ac
SmallerTypical 0.14 acBigger

Bigger than 92% of homes nearby

Year built1992
OlderTypical 1984Newer

Newer than 72% of homes nearby

How 1840 Castle Dr ranks against every home in each area.
MeasureThis homeCollegePetaluma 94954Sonoma County
Estimated valuepricier than$1,140,01990% of homes92% of homes82% of homes
Price per ft²pricier than$48855% of homes56% of homes50% of homes
Living areabigger than2,337 ft²83% of homes87% of homes84% of homes
Lot sizebigger than0.27 ac94% of homes92% of homes69% of homes
Year builtnewer than199252% of homes72% of homes76% of homes

About 1840 Castle Dr

How much is 1840 Castle Dr, Petaluma, CA worth?

The TopHap Estimate for 1840 Castle Dr, Petaluma, CA is $1,140,019 as of Sep 24, 2026. The likely range is $949,433 to $1,330,605. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 1840 Castle Dr, Petaluma, CA last sell?

1840 Castle Dr, Petaluma, CA last sold on Mar 23, 2010 for $620,000, according to the county's recorded deed. TopHap holds 5 recorded sales for this parcel.

How big is 1840 Castle Dr, Petaluma, CA?

1840 Castle Dr, Petaluma, CA has 4 bedrooms, 2 bathrooms, 2,337 square feet of living space and a 0.27-acre lot.

When was 1840 Castle Dr, Petaluma, CA built?

1840 Castle Dr, Petaluma, CA was built in 1992, making it 34 years old. It is a custom design home. The building has 1 story.

What schools serve 1840 Castle Dr, Petaluma, CA?

1840 Castle Dr, Petaluma, CA is assigned to Sonoma Mountain Elementary Charter School (elementary), rated A; Kenilworth Junior High School (middle), rated B; Casa Grande High School (high), rated B+. All sit in Old Adobe Union Elementary School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 1840 Castle Dr, Petaluma, CA compare to other homes in Petaluma 94954?

Among the 11,797 homes in Petaluma 94954, it is worth more than 92% of them ($1,140,019 against a typical $799,872), its price per square foot is higher than 56% of them ($488 against a typical $477), it is bigger than 87% of them (2,337 ft² against a typical 1,669 ft²), its lot is bigger than 92% of them (0.27 ac against a typical 0.14 ac) and it is newer than 72% of them (1992 against a typical 1984). Measured against all of Sonoma 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 1840 Castle Dr, Petaluma, CA?

The 2025 property tax bill for 1840 Castle Dr, Petaluma, CA was $9,169. The county assessed it at $816,300.

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