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Single Family ResidenceResidential
$1,191,713$690 / 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 96How 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 $735,000 on Aug 31, 2005

623 WALNUT ST

PETALUMA, CA 94952
3
Beds
2.5
Baths
1,728 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.
0.17 ac
Lot SizeThe size of the land the home sits on, from county records.
1900
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

$1.2M
$1.1M low$1.2M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$735,000 · Aug 31, 2005

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$12,674 (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.$1,129,592 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$696,950
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$432,642
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,107,444

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
StyleThe architectural style of the home, such as ranch or colonial.Custom Design
CountySONOMA
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.1950
Lot (acres)The size of the land the home sits on, from county records.0.17
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.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(4)

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.

M
Petaluma Junior High SchoolB-
Middle · Grades 7–8 · 0.7 mi
H
Petaluma High SchoolB
High · Grades 9–12 · 0.9 mi
E
McKinley Elementary SchoolB
Elementary · Grades KG–6 · 0.9 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

623 Walnut 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 84% of homes in Sonoma County
  • Costs more per square foot than 86% of homes in Sonoma County
  • Among the oldest homes in Sonoma County

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
$527K$2.3M

This home is worth more than 68% 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$1,191,713
CheaperTypical $1,015,313Pricier

Pricier than 68% of homes nearby

Price per ft²$690
CheaperTypical $597Pricier

Pricier than 72% of homes nearby

Living area1,728 ft²
SmallerTypical 1,690 ft²Bigger

Bigger than 52% of homes nearby

Lot size0.17 ac
SmallerTypical 0.18 acBigger

Bigger than 46% of homes nearby

Year built1900
OlderTypical 1964Newer

Newer than 7% of homes nearby

How 623 Walnut St ranks against every home in each area.
MeasureThis homeOakhill BrewsterPetaluma 94952Sonoma County
Estimated valuepricier than$1,191,71378% of homes68% of homes84% of homes
Price per ft²pricier than$69082% of homes72% of homes86% of homes
Living areabigger than1,728 ft²55% of homes52% of homes59% of homes
Lot sizebigger than0.17 ac54% of homes46% of homes52% of homes
Year builtnewer than190011% of homes7% of homesalmost no homes

About 623 Walnut St

How much is 623 Walnut St, Petaluma, CA worth?

The TopHap Estimate for 623 Walnut St, Petaluma, CA is $1,191,713 as of Sep 24, 2026. The likely range is $1,148,846 to $1,234,580. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 623 Walnut St, Petaluma, CA last sell?

623 Walnut St, Petaluma, CA last sold on Aug 31, 2005 for $735,000, according to the county's recorded deed.

How big is 623 Walnut St, Petaluma, CA?

623 Walnut St, Petaluma, CA has 3 bedrooms, 2.5 bathrooms, 1,728 square feet of living space and a 0.17-acre lot.

When was 623 Walnut St, Petaluma, CA built?

623 Walnut St, Petaluma, CA was built in 1900, making it 126 years old. It is a custom design home. The building has 2 stories.

What schools serve 623 Walnut St, Petaluma, CA?

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

How does 623 Walnut St, Petaluma, CA compare to other homes in Petaluma 94952?

Among the 10,074 homes in Petaluma 94952, it is worth more than 68% of them ($1,191,713 against a typical $1,015,313), its price per square foot is higher than 72% of them ($690 against a typical $597), it is bigger than 52% of them (1,728 ft² against a typical 1,690 ft²), its lot is bigger than 46% of them (0.17 ac against a typical 0.18 ac) and it is newer than 7% of them (1900 against a typical 1964). Measured against all of Sonoma County, it is worth more than 84% 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 623 Walnut St, Petaluma, CA?

The 2025 property tax bill for 623 Walnut St, Petaluma, CA was $12,674. The county assessed it at $1,129,592.

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