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CondominiumResidential
$738,454$423 / 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 95How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $749,822 on Sep 29, 2023

403 SEMILLON LN

SANTA ROSA, CA 95403
3
Beds
3 / 1
Baths
1,746 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.
1,746 ft²
Lot SizeThe size of the land the home sits on, from county records.
2022
Year BuiltThe year the home was originally built, according to county records.
3
StoriesHow many floors the home has above ground.
7
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

$738K
$701K low$776K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$749,822 · Sep 29, 2023

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,532 (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.$754,009 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$229,500
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$524,509
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$754,009

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.21
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
79
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.
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
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.2023
Lot (acres)The size of the land the home sits on, from county records.0.04
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached

Transaction History(2)

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
Hidden Valley Elementary SchoolA-
Elementary · Grades KG–6 · 1.4 mi
H
Santa Rosa High SchoolB-
High · Grades 9–12 · 1.9 mi
M
Santa Rosa Middle SchoolD-
Middle · Grades 7–8 · 2.5 mi

District: Santa Rosa Elementary School District

Neighborhood · ZIP 95403These 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.104
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.86
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.511

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.19%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.4%
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.43,826
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,997 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$96,508
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$119,029
Average tempThe average temperature here across a full year.58°F
Annual precipHow much rain and melted snow falls here in a typical year.37 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.78%

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

403 Semillon Ln 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 80% of homes in Fountaingrove
  • Costs less per square foot than 79% of homes in Fountaingrove
  • Smaller than 83% of homes in Fountaingrove
  • Has a smaller lot than 92% of homes in Sonoma County
  • Among the newest homes in Sonoma County

What homes are worth in Santa Rosa 95403

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

This home
$305K$2M

This home is worth more than 57% of homes in Santa Rosa 95403.

How it measures up in Santa Rosa 95403

The dot is this home. The mark in the middle is the typical home in Santa Rosa 95403.

Estimated value$738,454
CheaperTypical $710,098Pricier

Pricier than 57% of homes nearby

Price per ft²$423
CheaperTypical $437Pricier

Pricier than 41% of homes nearby

Living area1,746 ft²
SmallerTypical 1,630 ft²Bigger

Bigger than 58% of homes nearby

Lot size1,746 ft²
SmallerTypical 0.15 acBigger

Bigger than 12% of homes nearby

Year built2022
OlderTypical 1989Newer

Newer than almost all homes nearby

How 403 Semillon Ln ranks against every home in each area.
MeasureThis homeFountaingroveSanta Rosa 95403Sonoma County
Estimated valuepricier than$738,45420% of homes57% of homes45% of homes
Price per ft²pricier than$42321% of homes41% of homes27% of homes
Living areabigger than1,746 ft²17% of homes58% of homes60% of homes
Lot sizebigger than1,746 ft²10% of homes12% of homes8% of homes
Year builtnewer than202298% of homesalmost all homesalmost all homes

About 403 Semillon Ln

How much is 403 Semillon Ln, Santa Rosa, CA worth?

The TopHap Estimate for 403 Semillon Ln, Santa Rosa, CA is $738,454 as of Jul 14, 2026. The likely range is $700,562 to $776,346. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 403 Semillon Ln, Santa Rosa, CA last sell?

403 Semillon Ln, Santa Rosa, CA last sold on Sep 29, 2023 for $749,822, according to the county's recorded deed.

How big is 403 Semillon Ln, Santa Rosa, CA?

403 Semillon Ln, Santa Rosa, CA has 3 bedrooms, 3 bathrooms, 1,746 square feet of living space and a 0.04-acre lot.

When was 403 Semillon Ln, Santa Rosa, CA built?

403 Semillon Ln, Santa Rosa, CA was built in 2022, making it 4 years old. The building has 3 stories.

What schools serve 403 Semillon Ln, Santa Rosa, CA?

403 Semillon Ln, Santa Rosa, CA is assigned to Hidden Valley Elementary School (elementary), rated A-; Santa Rosa High School (high), rated B-; Santa Rosa Middle School (middle), rated D-. All sit in Santa Rosa Elementary School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 403 Semillon Ln, Santa Rosa, CA compare to other homes in Santa Rosa 95403?

Among the 12,533 homes in Santa Rosa 95403, it is worth more than 57% of them ($738,454 against a typical $710,098), its price per square foot is higher than 41% of them ($423 against a typical $437), it is bigger than 58% of them (1,746 ft² against a typical 1,630 ft²), its lot is bigger than 12% of them (1,746 ft² against a typical 0.15 ac) and it is newer than almost all of them (2022 against a typical 1989). Measured against all of Sonoma County, it is worth more than 45% 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 403 Semillon Ln, Santa Rosa, CA?

The 2025 property tax bill for 403 Semillon Ln, Santa Rosa, CA was $8,532. The county assessed it at $754,009.

More homes on Semillon Ln

Closest homes

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Assigned schools

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