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CondominiumResidential

3840 Martina Ave

SANTA ROSA, CA 95407
1 ft²
Lot SizeThe size of the land the home sits on, from county records.
2006
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
Built 20062 floors12 units972–1,013 ft²
$4.8M
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.
$394K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$395
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

-16.7%vs the Santa Rosa ZIP median sale $/ft² ($474)

Sales Performance

—
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.
0
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
0.0%
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.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
-26.3%per yeartypical hold 2.9 yrsfrom 21 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
20062007201020112015201720232025
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
20062007201020112015201720232025

33 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.

Every unit: size vs estimated valueEvery unit in the building as one dot: across is its size, up is our current value estimate, and color is its bedroom count. Vertical columns of dots are recurring floor plans; the height spread within a column shows how much floor, view and condition move prices for the same layout.
$377K$400K$424K$447K972 ft²980 ft²988 ft²997 ft²1,005 ft²1,013 ft²
2 bd
2 bed
12 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 · 3 ba · 1,013 ft²
8 units
2 bd · 2 ba · 972 ft²
4 units

Value DistributionHow the building's units spread across value ranges by our current estimates. A wide spread usually means big differences in size, floor or view.

$377K–$385K
3 units
$389K–$394K
3 units
$395K–$398K
2 units
$422K–$428K
3 units
$447K–$447K
1 unit

Value by Floor & LineAverage estimated price per square foot by floor range, using unit numbers to infer floors. Higher floors usually price higher — the gap shows how much the view is worth here.

Floor 1
$397/ft²
Floor 2
$406/ft²

Ownership & Financing

Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.25%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.33%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.14.8 yrs
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.50%
Avg. loan-to-valueAverage current loan balance against unit value across the building. Low numbers mean owners hold lots of equity — a sign of financial stability.17%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$396,770
Median tax billThe middle annual property tax bill among the building's units.$2,209
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.

Unit 208May 19, 2025$421,822Unit 104Dec 11, 2023$375,000Unit 207Oct 29, 2020$334,822Unit 206May 16, 2017$295,000Unit 101Jul 30, 2015$210,000Unit 202Jun 15, 2012$120,000Unit 208Jun 8, 2012$140,000Unit 205Apr 1, 2011$125,000Unit 102Dec 20, 2010$125,000Unit 201Oct 6, 2010$140,000

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

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
56
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
60
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.19 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.Condominium
StyleThe architectural style of the home, such as ranch or colonial.Custom Design
CountySONOMA
HeatingThe type of heating system in the home.Central
PoolWhether the property has a pool, and what kind, such as in-ground.No

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

E
Wright CharterD
Elementary · Grades KG–8 · 0.7 mi
H
Elsie Allen High SchoolD
High · Grades 9–12 · 2.1 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%

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.

3840 Martina Ave # 101
2 bd · 2 ba · 972 ft²
$398K
3840 Martina Ave # 102
2 bd · 2 ba · 972 ft²
$377K
3840 Martina Ave # 103
2 bd · 2 ba · 972 ft²
$389K
3840 Martina Ave # 104
2 bd · 2 ba · 972 ft²
$379K
3840 Martina Ave # 201
2 bd · 2.5 ba · 1,013 ft²
$427K
3840 Martina Ave # 202
2 bd · 2.5 ba · 1,013 ft²
$385K
3840 Martina Ave # 203
2 bd · 2.5 ba · 1,013 ft²
$392K
3840 Martina Ave # 204
2 bd · 2.5 ba · 1,013 ft²
$447K
3840 Martina Ave # 205
2 bd · 2.5 ba · 1,013 ft²
$428K
3840 Martina Ave # 206
2 bd · 2.5 ba · 1,013 ft²
$394K
3840 Martina Ave # 207
2 bd · 2.5 ba · 1,013 ft²
$395K
3840 Martina Ave # 208
2 bd · 2.5 ba · 1,013 ft²
$422K

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

About 3840 Martina Ave

How many units are in 3840 Martina Ave, Santa Rosa, CA?

3840 Martina Ave, Santa Rosa, CA has 12 residential units across 2 floors, built in 2006, according to county assessor records.

What is a unit at 3840 Martina Ave, Santa Rosa, CA worth?

The median TopHap Estimate across the 12 units at 3840 Martina Ave, Santa Rosa, CA is $394,123. That works out to $395 per square foot. Units run from 972 to 1,013 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 3840 Martina Ave, Santa Rosa, CA expensive for Santa Rosa?

Units at 3840 Martina Ave, Santa Rosa, CA carry a median of $395 per square foot, 17% below the Santa Rosa median of $474 per square foot.

How often do units sell at 3840 Martina Ave, Santa Rosa, CA?

0 units at 3840 Martina Ave, Santa Rosa, CA sold in the last 12 months, out of 33 recorded arms-length sales all time. That is a turnover rate of 0.0% of the building per year.

Have units at 3840 Martina Ave, Santa Rosa, CA appreciated?

Across 21 repeat sales of the same unit, 3840 Martina Ave, Santa Rosa, CA returned a median -26.3% per year. Because each pair is the same unit bought and sold, the figure is not distorted by which units traded. The median owner held for 2.9 years.

What floor plans does 3840 Martina Ave, Santa Rosa, CA have?

The most common plan at 3840 Martina Ave, Santa Rosa, CA is a 2-bedroom of 1,013 square feet, repeated 8 times, with a median estimate of $408,186. TopHap identifies 2 recurring plans in the building.

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