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CondominiumResidential
$588,082
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 86How 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 $675,500 on Sep 27, 2024

647 SEMILLON LN

SANTA ROSA, CA 95403
0
Baths
1,746 ft²
Lot SizeThe size of the land the home sits on, from county records.

Valuation

$588K
$509K low$668K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$675,500 · Sep 27, 2024

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,717 (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.$688,897 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$204,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$484,897
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$675,390

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.
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.
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.Condo/Apartment
CountySONOMA
Lot (acres)The size of the land the home sits on, from county records.0.04
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(1)

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 · 1.8 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%

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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

647 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 92% of homes in Fountaingrove
  • Has a smaller lot than 92% of 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
$300K$1.9M

This home is worth more than 23% 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$588,082
CheaperTypical $710,073Pricier

Pricier than 23% of homes nearby

Lot size1,746 ft²
SmallerTypical 0.15 acBigger

Bigger than 12% of homes nearby

How 647 Semillon Ln ranks against every home in each area.
MeasureThis homeFountaingroveSanta Rosa 95403Sonoma County
Estimated valuepricier than$588,0828% of homes23% of homes20% of homes
Lot sizebigger than1,746 ft²13% of homes12% of homes8% of homes

About 647 Semillon Ln

How much is 647 Semillon Ln, Santa Rosa, CA worth?

The TopHap Estimate for 647 Semillon Ln, Santa Rosa, CA is $588,082 as of Jul 14, 2026. The likely range is $508,663 to $667,501. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 647 Semillon Ln, Santa Rosa, CA last sell?

647 Semillon Ln, Santa Rosa, CA last sold on Sep 27, 2024 for $675,500, according to the county's recorded deed.

What schools serve 647 Semillon Ln, Santa Rosa, CA?

647 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 647 Semillon Ln, Santa Rosa, CA compare to other homes in Santa Rosa 95403?

Among the 12,653 homes in Santa Rosa 95403, it is worth more than 23% of them ($588,082 against a typical $710,073) and its lot is bigger than 12% of them (1,746 ft² against a typical 0.15 ac). Measured against all of Sonoma County, it is worth more than 20% 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 647 Semillon Ln, Santa Rosa, CA?

The 2025 property tax bill for 647 Semillon Ln, Santa Rosa, CA was $7,717. The county assessed it at $688,897.

More homes on Semillon Ln

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Assigned schools

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