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Single Family ResidenceResidential
$856,505$461 / 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 92How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $660,000 on Jun 13, 2016

18101 FIELD WAY

UNINCORP COUNTY, CA
3
Beds
3
Baths
1,856 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.
0.2 ac
Lot SizeThe size of the land the home sits on, from county records.
1939
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
5
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

$857K
$791K low$922K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$660,000 · Jun 13, 2016

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,429 (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.$807,965 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$211,305
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$596,660
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$792,123

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.41
100
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.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.197 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.Single Family Residence
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.2005
Lot (acres)The size of the land the home sits on, from county records.0.20
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.Central
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(11)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Foreclosure Filings(2)

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

E
Monte Rio Elementary SchoolB
Elementary · Grades KG–8 · 0.6 mi
H
Analy High SchoolA-
High · Grades 9–12 · 10.7 mi

District: West Sonoma County Union High School District

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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

18101 Field Way 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.

  • Bigger than 66% of homes in Sonoma County
  • Older than 92% of homes in Sonoma County

How it measures up in Sonoma County

The dot is this home. The mark in the middle is the typical home in Sonoma County.

Estimated value$856,505
CheaperTypical $773,115Pricier

Pricier than 61% of homes nearby

Price per ft²$461
CheaperTypical $488Pricier

Pricier than 40% of homes nearby

Living area1,856 ft²
SmallerTypical 1,560 ft²Bigger

Bigger than 66% of homes nearby

Lot size0.2 ac
SmallerTypical 0.16 acBigger

Bigger than 61% of homes nearby

Year built1939
OlderTypical 1978Newer

Newer than 8% of homes nearby

How 18101 Field Way ranks against every home in each area.
MeasureThis homeSonoma County
Estimated valuepricier than$856,50561% of homes
Price per ft²pricier than$46140% of homes
Living areabigger than1,856 ft²66% of homes
Lot sizebigger than0.2 ac61% of homes
Year builtnewer than19398% of homes

About 18101 Field Way

How much is 18101 Field Way, Unincorp County, CA worth?

The TopHap Estimate for 18101 Field Way, Unincorp County, CA is $856,505 as of Aug 30, 2026. The likely range is $790,915 to $922,095. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18101 Field Way, Unincorp County, CA last sell?

18101 Field Way, Unincorp County, CA last sold on Jun 13, 2016 for $660,000, according to the county's recorded deed. TopHap holds 6 recorded sales for this parcel.

How big is 18101 Field Way, Unincorp County, CA?

18101 Field Way, Unincorp County, CA has 3 bedrooms, 3 bathrooms, 1,856 square feet of living space and a 0.20-acre lot.

When was 18101 Field Way, Unincorp County, CA built?

18101 Field Way, Unincorp County, CA was built in 1939, making it 87 years old. The building has 2 stories.

What schools serve 18101 Field Way, Unincorp County, CA?

18101 Field Way, Unincorp County, CA is assigned to Monte Rio Elementary School (elementary), rated B; Analy High School (high), rated A-. All sit in West Sonoma County Union High School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 18101 Field Way, Unincorp County, CA compare to other homes in Sonoma County?

Among the 155,409 homes in Sonoma County, it is worth more than 61% of them ($856,505 against a typical $773,115), its price per square foot is higher than 40% of them ($461 against a typical $488), it is bigger than 66% of them (1,856 ft² against a typical 1,560 ft²), its lot is bigger than 61% of them (0.2 ac against a typical 0.16 ac) and it is newer than 8% of them (1939 against a typical 1978). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 18101 Field Way, Unincorp County, CA?

The 2025 property tax bill for 18101 Field Way, Unincorp County, CA was $9,429. The county assessed it at $807,965.

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