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CondominiumResidential
$376,802$444 / 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 94How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026
Last sold for $299,500 on Dec 23, 2004

21 ARBOR CT

COTATI, CA 94931
2
Beds
1
Baths
848 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.
1 ft²
Lot SizeThe size of the land the home sits on, from county records.
1984
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
2
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$377K
$355K low$399K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$299,500 · Dec 23, 2004

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,889 (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.$408,000 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$122,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$286,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$395,000

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.38
88
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
78
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
27
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.33 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
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.1 percent flood zone

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
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.1985
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.Carport (Unspecified)
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
John Reed Elementary SchoolD-
Elementary · Grades KG–5 · 0.5 mi
M
Technology Middle SchoolD-
Middle · Grades 6–8 · 0.6 mi
H
Rancho Cortate High SchoolC-
High · Grades 9–12 · 1.4 mi

District: Cotati-Rohnert Park Unified School District

Neighborhood · ZIP 94931These 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.117
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.87
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.390

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.22%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.10%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.11,713
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,520 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$89,956
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$112,536
Average tempThe average temperature here across a full year.58°F
Annual precipHow much rain and melted snow falls here in a typical year.36 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

21 Arbor 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 less than 96% of homes in Sonoma County
  • Costs less per square foot than 67% of homes in Cotati 94931
  • Smaller than 94% of homes in Sonoma County
  • Has a smaller lot than 95% of homes in Sonoma County

What homes are worth in Cotati 94931

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

This home
$344K$1.5M

This home is worth more than 5% of homes in Cotati 94931.

How it measures up in Cotati 94931

The dot is this home. The mark in the middle is the typical home in Cotati 94931.

Estimated value$376,802
CheaperTypical $705,145Pricier

Pricier than 5% of homes nearby

Price per ft²$444
CheaperTypical $472Pricier

Pricier than 33% of homes nearby

Living area848 ft²
SmallerTypical 1,432 ft²Bigger

Bigger than 9% of homes nearby

Lot size1 ft²
SmallerTypical 0.15 acBigger

Bigger than 9% of homes nearby

Year built1984
OlderTypical 1985Newer

Newer than 48% of homes nearby

How 21 Arbor Ct ranks against every home in each area.
MeasureThis homeCotati 94931Sonoma County
Estimated valuepricier than$376,8025% of homes4% of homes
Price per ft²pricier than$44433% of homes35% of homes
Living areabigger than848 ft²9% of homes6% of homes
Lot sizebigger than1 ft²9% of homes5% of homes
Year builtnewer than198448% of homes61% of homes

About 21 Arbor Ct

How much is 21 Arbor Ct, Cotati, CA worth?

The TopHap Estimate for 21 Arbor Ct, Cotati, CA is $376,802 as of Oct 21, 2026. The likely range is $354,729 to $398,875. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Arbor Ct, Cotati, CA last sell?

21 Arbor Ct, Cotati, CA last sold on Dec 23, 2004 for $299,500, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 21 Arbor Ct, Cotati, CA?

21 Arbor Ct, Cotati, CA has 2 bedrooms, 1 bathrooms and 848 square feet of living space.

When was 21 Arbor Ct, Cotati, CA built?

21 Arbor Ct, Cotati, CA was built in 1984, making it 42 years old. The building has 2 stories.

What schools serve 21 Arbor Ct, Cotati, CA?

21 Arbor Ct, Cotati, CA is assigned to John Reed Elementary School (elementary), rated D-; Technology Middle School (middle), rated D-; Rancho Cortate High School (high), rated C-. All sit in Cotati-Rohnert Park Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Arbor Ct, Cotati, CA compare to other homes in Cotati 94931?

Among the 2,961 homes in Cotati 94931, it is worth more than 5% of them ($376,802 against a typical $705,145), its price per square foot is higher than 33% of them ($444 against a typical $472), it is bigger than 9% of them (848 ft² against a typical 1,432 ft²), its lot is bigger than 9% of them (1 ft² against a typical 0.15 ac) and it is newer than 48% of them (1984 against a typical 1985). Measured against all of Sonoma County, it is worth more than 4% 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 21 Arbor Ct, Cotati, CA?

The 2025 property tax bill for 21 Arbor Ct, Cotati, CA was $4,889. The county assessed it at $408,000.

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