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Single Family ResidenceResidential
$888,454$680 / 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 87How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026
Last sold for $455,000 on Dec 5, 2012

4840 HIGHWAY 1

UNINCORP COUNTY, CA
2
Beds
1
Baths
1,306 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.
0.22 ac
Lot SizeThe size of the land the home sits on, from county records.
1957
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
4
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

$888K
$777K low$1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$455,000 · Dec 5, 2012

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,414 (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.$571,495 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$251,207
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$320,288
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$560,290

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
99
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
76
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
30
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.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.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
StyleThe architectural style of the home, such as ranch or colonial.Custom Design
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.1969
Lot (acres)The size of the land the home sits on, from county records.0.22
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.None
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(6)

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
Bodega Bay Elementary SchoolA
Elementary · Grades KG–5 · 3.1 mi
M
Tomales Elementary SchoolB
Middle · Grades KG–8 · 12.9 mi
H
Tomales High SchoolD
High · Grades 9–12 · 13.1 mi

District: Shoreline Unified 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

4840 Highway 1 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 more than 65% of homes in Sonoma County
  • Costs more per square foot than 86% of homes in Sonoma County
  • Smaller than 68% of homes in Sonoma County
  • Older than 79% 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$888,454
CheaperTypical $771,340Pricier

Pricier than 65% of homes nearby

Price per ft²$680
CheaperTypical $486Pricier

Pricier than 86% of homes nearby

Living area1,306 ft²
SmallerTypical 1,564 ft²Bigger

Bigger than 32% of homes nearby

Lot size0.22 ac
SmallerTypical 0.17 acBigger

Bigger than 64% of homes nearby

Year built1957
OlderTypical 1978Newer

Newer than 21% of homes nearby

How 4840 Highway 1 ranks against every home in each area.
MeasureThis homeSonoma County
Estimated valuepricier than$888,45465% of homes
Price per ft²pricier than$68086% of homes
Living areabigger than1,306 ft²32% of homes
Lot sizebigger than0.22 ac64% of homes
Year builtnewer than195721% of homes

About 4840 Highway 1

How much is 4840 Highway 1, Unincorp County, CA worth?

The TopHap Estimate for 4840 Highway 1, Unincorp County, CA is $888,454 as of Sep 24, 2026. The likely range is $776,673 to $1,000,235. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4840 Highway 1, Unincorp County, CA last sell?

4840 Highway 1, Unincorp County, CA last sold on Dec 5, 2012 for $455,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 4840 Highway 1, Unincorp County, CA?

4840 Highway 1, Unincorp County, CA has 2 bedrooms, 1 bathrooms, 1,306 square feet of living space and a 0.22-acre lot.

When was 4840 Highway 1, Unincorp County, CA built?

4840 Highway 1, Unincorp County, CA was built in 1957, making it 69 years old. It is a custom design home. The building has 1 story.

What schools serve 4840 Highway 1, Unincorp County, CA?

4840 Highway 1, Unincorp County, CA is assigned to Bodega Bay Elementary School (elementary), rated A; Tomales Elementary School (middle), rated B; Tomales High School (high), rated D. All sit in Shoreline Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4840 Highway 1, Unincorp County, CA compare to other homes in Sonoma County?

Among the 155,413 homes in Sonoma County, it is worth more than 65% of them ($888,454 against a typical $771,340), its price per square foot is higher than 86% of them ($680 against a typical $486), it is bigger than 32% of them (1,306 ft² against a typical 1,564 ft²), its lot is bigger than 64% of them (0.22 ac against a typical 0.17 ac) and it is newer than 21% of them (1957 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 4840 Highway 1, Unincorp County, CA?

The 2025 property tax bill for 4840 Highway 1, Unincorp County, CA was $6,414. The county assessed it at $571,495.

More homes on Highway 1

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Assigned schools

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