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Mobile HomeResidential
Last sold for $3,874,000 on Dec 23, 2025

3309 SANTA ROSA AVE

SANTA ROSA, CA 95407
4.09 ac
Lot SizeThe size of the land the home sits on, from county records.
1977
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
Built 197736 units800–800 ft²
—
All units combinedThe sum of our current value estimates for every unit in the building — roughly what the whole building's homes are worth together.
—
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
—
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

Sales Performance

$3.9M
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
—
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
1
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
2.8%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.

1 arms-length sales on record for this building.

Unit Mix & Floor PlansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.

Studio
2 units
2 bed
34 units
Recurring floor plansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.
2 bd · 1 ba · 800 ft²
34 units
One-off layouts
2 units

Ownership & Financing

Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.94%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.6%
Cash purchases (5 yrs)The share of purchases in the last 5 years with no mortgage recorded. High cash share is common in second-home and investor buildings.0%
Median tax billThe middle annual property tax bill among the building's units.$253
Pre-foreclosure noticesUnits with an active pre-foreclosure or foreclosure notice on file.0

Recent SalesThe latest recorded arms-length sales in the building, newest first.

BuildingDec 23, 2025$3,874,000

Values are TopHap estimates, not appraisals. Sales, ownership and tax figures come from recorded county documents via ATTOM and can lag by several weeks.

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$80,414 (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.$1,325,358 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$600,512
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$724,846
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,299,372

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.28
49
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
65
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.13 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.Mobile Home
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.1988
Lot (acres)The size of the land the home sits on, from county records.4.09
HeatingThe type of heating system in the home.None
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(8)

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
Taylor Mountain Elementary SchoolD-
Elementary · Grades PK–6 · 0.4 mi
H
Elsie Allen High SchoolD
High · Grades 9–12 · 1.3 mi
M
Hilliard Comstock Middle SchoolF
Middle · Grades 7–8 · 4.5 mi

District: Santa Rosa High School District

Neighborhood · ZIP 95407These 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.89
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 100.460

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.13%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.14%
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.44,580
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,957 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$74,343
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$96,028
Average tempThe average temperature here across a full year.58°F
Annual precipHow much rain and melted snow falls here in a typical year.35 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.78%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Absentee owner
Company ownedWhether the owner is a company or trust rather than a person.Yes

All UnitsEvery property record the county has at this street address, such as the units in a condo building. Prices shown are our estimates, not asking prices.

3309 Santa Rosa Ave
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 5
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 7
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 8
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 9
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 13
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 14
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 15
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 16
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 17
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 18
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 22
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 23
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 25
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 30
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 31
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 35
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 36
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 37
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 40
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 43
3309 Santa Rosa Ave Spc 44
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 45
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 47
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 48
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 49
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 50
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 51
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 52
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 54
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 55
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 56
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 57
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 59
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 60
800 ft²
3309 Santa Rosa Ave Spc 61
2 bd · 1 ba · 800 ft²
3309 Santa Rosa Ave Spc 63
2 bd · 1 ba · 800 ft²

Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

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